More test reorg.

3 files changed, 1370 insertions, 1344 deletions

diff --git a/tests/numerics/t_amount.cc b/tests/numerics/t_amount.cc
index 94e32c01..67ea1781 100644
--- a/tests/numerics/t_amount.cc
+++ b/tests/numerics/t_amount.cc
@@ -2,9 +2,9 @@
 
 #define internalAmount(x) amount_t::exact(x)
 
-CPPUNIT_TEST_SUITE_NAMED_REGISTRATION(BasicAmountTestCase, "numerics");
+CPPUNIT_TEST_SUITE_NAMED_REGISTRATION(AmountTestCase, "numerics");
 
-void BasicAmountTestCase::setUp()
+void AmountTestCase::setUp()
 {
   ledger::set_session_context(&session);
 
@@ -14,14 +14,14 @@ void BasicAmountTestCase::setUp()
   amount_t::stream_fullstrings = true; // makes error reports from UnitTests accurate
 }
 
-void BasicAmountTestCase::tearDown()
+void AmountTestCase::tearDown()
 {
   amount_t::stream_fullstrings = false;
 
   ledger::set_session_context();
 }
 
-void BasicAmountTestCase::testConstructors()
+void AmountTestCase::testConstructors()
 {
   amount_t x0;
   amount_t x1(123456L);
@@ -47,624 +47,20 @@ void BasicAmountTestCase::testConstructors()
   assertEqual(x10, x3);
   assertEqual(x10, x9);
 
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-  CPPUNIT_ASSERT(x3.valid());
-  CPPUNIT_ASSERT(x5.valid());
-  CPPUNIT_ASSERT(x6.valid());
-  CPPUNIT_ASSERT(x7.valid());
-  CPPUNIT_ASSERT(x8.valid());
-  CPPUNIT_ASSERT(x9.valid());
-  CPPUNIT_ASSERT(x10.valid());
-  CPPUNIT_ASSERT(x11.valid());
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+  assertTrue(x3.valid());
+  assertTrue(x5.valid());
+  assertTrue(x6.valid());
+  assertTrue(x7.valid());
+  assertTrue(x8.valid());
+  assertTrue(x9.valid());
+  assertTrue(x10.valid());
+  assertTrue(x11.valid());
 }
 
-void BasicAmountTestCase::testAssignment()
-{
-  amount_t x0;
-  amount_t x1  = 123456L;
-  amount_t x2  = 123456UL;
-  amount_t x3  = 123.456;
-  amount_t x5  = "123456";
-  amount_t x6  = "123.456";
-  amount_t x7  = string("123456");
-  amount_t x8  = string("123.456");
-  amount_t x9  = x3;
-  amount_t x10 = amount_t(x6);
-
-  assertEqual(amount_t(0L), x0);
-  assertEqual(x2, x1);
-  assertEqual(x5, x1);
-  assertEqual(x7, x1);
-  assertEqual(x6, x3);
-  assertEqual(x8, x3);
-  assertEqual(x10, x3);
-  assertEqual(x10, x9);
-
-  x0  = amount_t();
-  x1  = 123456L;
-  x2  = 123456UL;
-  x3  = 123.456;
-  x5  = "123456";
-  x6  = "123.456";
-  x7  = string("123456");
-  x8  = string("123.456");
-  x9  = x3;
-  x10 = amount_t(x6);
-
-  assertEqual(amount_t(0L), x0);
-  assertEqual(x2, x1);
-  assertEqual(x5, x1);
-  assertEqual(x7, x1);
-  assertEqual(x6, x3);
-  assertEqual(x8, x3);
-  assertEqual(x10, x3);
-  assertEqual(x10, x9);
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-  CPPUNIT_ASSERT(x3.valid());
-  CPPUNIT_ASSERT(x5.valid());
-  CPPUNIT_ASSERT(x6.valid());
-  CPPUNIT_ASSERT(x7.valid());
-  CPPUNIT_ASSERT(x8.valid());
-  CPPUNIT_ASSERT(x9.valid());
-  CPPUNIT_ASSERT(x10.valid());
-}
-
-void BasicAmountTestCase::testEquality()
-{
-  amount_t x1(123456L);
-  amount_t x2(456789L);
-  amount_t x3(333333L);
-  amount_t x4(123456.0);
-  amount_t x5("123456.0");
-  amount_t x6(123456.0F);
-
-  CPPUNIT_ASSERT(x1 == 123456L);
-  CPPUNIT_ASSERT(x1 != x2);
-  CPPUNIT_ASSERT(x1 == (x2 - x3));
-  CPPUNIT_ASSERT(x1 == x4);
-  CPPUNIT_ASSERT(x4 == x5);
-  CPPUNIT_ASSERT(x4 == x6);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-  CPPUNIT_ASSERT(x3.valid());
-  CPPUNIT_ASSERT(x4.valid());
-  CPPUNIT_ASSERT(x5.valid());
-  CPPUNIT_ASSERT(x6.valid());
-}
-
-void BasicAmountTestCase::testComparisons()
-{
-  amount_t x0;
-  amount_t x1(-123L);
-  amount_t x2(123L);
-  amount_t x3(-123.45);
-  amount_t x4(123.45);
-  amount_t x5("-123.45");
-  amount_t x6("123.45");
-
-  CPPUNIT_ASSERT(x0 > x1);
-  CPPUNIT_ASSERT(x0 < x2);
-  CPPUNIT_ASSERT(x0 > x3);
-  CPPUNIT_ASSERT(x0 < x4);
-  CPPUNIT_ASSERT(x0 > x5);
-  CPPUNIT_ASSERT(x0 < x6);
-
-  CPPUNIT_ASSERT(x1 > x3);
-  CPPUNIT_ASSERT(x3 <= x5);
-  CPPUNIT_ASSERT(x3 >= x5);
-  CPPUNIT_ASSERT(x3 < x1);
-  CPPUNIT_ASSERT(x3 < x4);
-
-  CPPUNIT_ASSERT(x1 < 100L);
-  CPPUNIT_ASSERT(x1 < 100UL);
-  CPPUNIT_ASSERT(x1 < 100.0);
-  CPPUNIT_ASSERT(100L > x1);
-  CPPUNIT_ASSERT(100UL > x1);
-  CPPUNIT_ASSERT(100.0 > x1);
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-  CPPUNIT_ASSERT(x3.valid());
-  CPPUNIT_ASSERT(x4.valid());
-  CPPUNIT_ASSERT(x5.valid());
-  CPPUNIT_ASSERT(x6.valid());
-}
-
-void BasicAmountTestCase::testIntegerAddition()
-{
-  amount_t x1(123L);
-  amount_t y1(456L);
-
-  assertEqual(amount_t(579L), x1 + y1);
-  assertEqual(amount_t(579L), x1 + 456L);
-  assertEqual(amount_t(579L), 456L + x1);
-
-  x1 += amount_t(456L);
-  assertEqual(amount_t(579L), x1);
-  x1 += 456L;
-  assertEqual(amount_t(1035L), x1);
-
-  amount_t x4("123456789123456789123456789");
-
-  assertEqual(amount_t("246913578246913578246913578"), x4 + x4);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x4.valid());
-}
-
-void BasicAmountTestCase::testFractionalAddition()
-{
-  amount_t x1(123.123);
-  amount_t y1(456.456);
-
-  assertEqual(amount_t(579.579), x1 + y1);
-  assertEqual(amount_t(579.579), x1 + 456.456);
-  assertEqual(amount_t(579.579), 456.456 + x1);
-
-  x1 += amount_t(456.456);
-  assertEqual(amount_t(579.579), x1);
-  x1 += 456.456;
-  assertEqual(amount_t(1036.035), x1);
-  x1 += 456L;
-  assertEqual(amount_t(1492.035), x1);
-
-  amount_t x2("123456789123456789.123456789123456789");
-
-  assertEqual(amount_t("246913578246913578.246913578246913578"), x2 + x2);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-}
-
-void BasicAmountTestCase::testIntegerSubtraction()
-{
-  amount_t x1(123L);
-  amount_t y1(456L);
-
-  assertEqual(amount_t(333L), y1 - x1);
-  assertEqual(amount_t(-333L), x1 - y1);
-  assertEqual(amount_t(23L), x1 - 100L);
-  assertEqual(amount_t(-23L), 100L - x1);
-
-  x1 -= amount_t(456L);
-  assertEqual(amount_t(-333L), x1);
-  x1 -= 456L;
-  assertEqual(amount_t(-789L), x1);
-
-  amount_t x4("123456789123456789123456789");
-  amount_t y4("8238725986235986");
-
-  assertEqual(amount_t("123456789115218063137220803"), x4 - y4);
-  assertEqual(amount_t("-123456789115218063137220803"), y4 - x4);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x4.valid());
-  CPPUNIT_ASSERT(y4.valid());
-}
-
-void BasicAmountTestCase::testFractionalSubtraction()
-{
-  amount_t x1(123.123);
-  amount_t y1(456.456);
-
-  assertEqual(amount_t(-333.333), x1 - y1);
-  assertEqual(amount_t(333.333), y1 - x1);
-
-  x1 -= amount_t(456.456);
-  assertEqual(amount_t(-333.333), x1);
-  x1 -= 456.456;
-  assertEqual(amount_t(-789.789), x1);
-  x1 -= 456L;
-  assertEqual(amount_t(-1245.789), x1);
-
-  amount_t x2("123456789123456789.123456789123456789");
-  amount_t y2("9872345982459.248974239578");
-
-  assertEqual(amount_t("123446916777474329.874482549545456789"), x2 - y2);
-  assertEqual(amount_t("-123446916777474329.874482549545456789"), y2 - x2);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-  CPPUNIT_ASSERT(y2.valid());
-}
-
-void BasicAmountTestCase::testIntegerMultiplication()
-{
-  amount_t x1(123L);
-  amount_t y1(456L);
-
-  assertEqual(amount_t(0L), x1 * 0L);
-  assertEqual(amount_t(0L), amount_t(0L) * x1);
-  assertEqual(amount_t(0L), 0L * x1);
-  assertEqual(x1, x1 * 1L);
-  assertEqual(x1, amount_t(1L) * x1);
-  assertEqual(x1, 1L * x1);
-  assertEqual(- x1, x1 * -1L);
-  assertEqual(- x1, amount_t(-1L) * x1);
-  assertEqual(- x1, -1L * x1);
-  assertEqual(amount_t(56088L), x1 * y1);
-  assertEqual(amount_t(56088L), y1 * x1);
-  assertEqual(amount_t(56088L), x1 * 456L);
-  assertEqual(amount_t(56088L), amount_t(456L) * x1);
-  assertEqual(amount_t(56088L), 456L * x1);
-
-  x1 *= amount_t(123L);
-  assertEqual(amount_t(15129L), x1);
-  x1 *= 123L;
-  assertEqual(amount_t(1860867L), x1);
-
-  amount_t x4("123456789123456789123456789");
-
-  assertEqual(amount_t("15241578780673678546105778281054720515622620750190521"),
-	      x4 * x4);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x4.valid());
-}
-
-void BasicAmountTestCase::testFractionalMultiplication()
-{
-  amount_t x1(123.123);
-  amount_t y1(456.456);
-
-  assertEqual(amount_t(0L), x1 * 0L);
-  assertEqual(amount_t(0L), amount_t(0L) * x1);
-  assertEqual(amount_t(0L), 0L * x1);
-  assertEqual(x1, x1 * 1L);
-  assertEqual(x1, amount_t(1L) * x1);
-  assertEqual(x1, 1L * x1);
-  assertEqual(- x1, x1 * -1L);
-  assertEqual(- x1, amount_t(-1L) * x1);
-  assertEqual(- x1, -1L * x1);
-  assertEqual(amount_t("56200.232088"), x1 * y1);
-  assertEqual(amount_t("56200.232088"), y1 * x1);
-  assertEqual(amount_t("56200.232088"), x1 * 456.456);
-  assertEqual(amount_t("56200.232088"), amount_t(456.456) * x1);
-  assertEqual(amount_t("56200.232088"), 456.456 * x1);
-
-  x1 *= amount_t(123.123);
-  assertEqual(amount_t("15159.273129"), x1);
-  x1 *= 123.123;
-  assertEqual(amount_t("1866455.185461867"), x1);
-  x1 *= 123L;
-  assertEqual(amount_t("229573987.811809641"), x1);
-
-  amount_t x2("123456789123456789.123456789123456789");
-
-  assertEqual(amount_t("15241578780673678546105778311537878.046486820281054720515622620750190521"),
-	      x2 * x2);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-}
-
-void BasicAmountTestCase::testIntegerDivision()
-{
-  amount_t x1(123L);
-  amount_t y1(456L);
-
-  assertThrow(x1 / 0L, amount_error);
-  assertEqual(amount_t(0L), amount_t(0L) / x1);
-  assertEqual(amount_t(0L), 0L / x1);
-  assertEqual(x1, x1 / 1L);
-  assertEqual(amount_t("0.008130"), amount_t(1L) / x1);
-  assertEqual(amount_t("0.008130"), 1L / x1);
-  assertEqual(- x1, x1 / -1L);
-  assertEqual(- amount_t("0.008130"), amount_t(-1L) / x1);
-  assertEqual(- amount_t("0.008130"), -1L / x1);
-  assertEqual(amount_t("0.269737"), x1 / y1);
-  assertEqual(amount_t("3.707317"), y1 / x1);
-  assertEqual(amount_t("0.269737"), x1 / 456L);
-  assertEqual(amount_t("3.707317"), amount_t(456L) / x1);
-  assertEqual(amount_t("3.707317"), 456L / x1);
-
-  x1 /= amount_t(456L);
-  assertEqual(amount_t("0.269737"), x1);
-  x1 /= 456L;
-  assertEqual(amount_t("0.00059152850877193"), x1);
-
-  amount_t x4("123456789123456789123456789");
-  amount_t y4("56");
-
-  assertEqual(amount_t(1L), x4 / x4);
-  assertEqual(amount_t("2204585520061728377204585.517857"), x4 / y4);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x4.valid());
-  CPPUNIT_ASSERT(y4.valid());
-}
-
-void BasicAmountTestCase::testFractionalDivision()
-{
-  amount_t x1(123.123);
-  amount_t y1(456.456);
-
-  assertThrow(x1 / 0L, amount_error);
-  assertEqual(amount_t("0.008121959"), amount_t(1.0) / x1);
-  assertEqual(amount_t("0.008121959"), 1.0 / x1);
-  assertEqual(x1, x1 / 1.0);
-  assertEqual(amount_t("0.008121959"), amount_t(1.0) / x1);
-  assertEqual(amount_t("0.008121959"), 1.0 / x1);
-  assertEqual(- x1, x1 / -1.0);
-  assertEqual(- amount_t("0.008121959"), amount_t(-1.0) / x1);
-  assertEqual(- amount_t("0.008121959"), -1.0 / x1);
-  assertEqual(amount_t("0.269736842105263"), x1 / y1);
-  assertEqual(amount_t("3.707317073170732"), y1 / x1);
-  assertEqual(amount_t("0.269736842105263"), x1 / 456.456);
-  assertEqual(amount_t("3.707317073170732"), amount_t(456.456) / x1);
-  assertEqual(amount_t("3.707317073170732"), 456.456 / x1);
-
-  x1 /= amount_t(456.456);
-  assertEqual(amount_t("0.269736842105263"), x1);
-  x1 /= 456.456;
-  assertEqual(amount_t("0.000590937225286255411255411255411255411"), x1);
-  x1 /= 456L;
-  assertEqual(amount_t("0.000001295914967733016252753094858358016252192982456140350877192982456140350877192982"), x1);
-
-  amount_t x4("1234567891234567.89123456789");
-  amount_t y4("56.789");
-
-  assertEqual(amount_t(1.0), x4 / x4);
-  assertEqual(amount_t("21739560323910.7554497273748437197344556164046"), x4 / y4);
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(y1.valid());
-  CPPUNIT_ASSERT(x4.valid());
-  CPPUNIT_ASSERT(y4.valid());
-}
-
-void BasicAmountTestCase::testNegation()
-{
-  amount_t x0;
-  amount_t x1(-123456L);
-  amount_t x3(-123.456);
-  amount_t x5("-123456");
-  amount_t x6("-123.456");
-  amount_t x7(string("-123456"));
-  amount_t x8(string("-123.456"));
-  amount_t x9(- x3);
-
-  assertEqual(amount_t(0L), x0);
-  assertEqual(x5, x1);
-  assertEqual(x7, x1);
-  assertEqual(x6, x3);
-  assertEqual(x8, x3);
-  assertEqual(- x6, x9);
-  assertEqual(x3.negate(), x9);
-
-  amount_t x10(x9.negate());
-
-  assertEqual(x3, x10);
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x3.valid());
-  CPPUNIT_ASSERT(x5.valid());
-  CPPUNIT_ASSERT(x6.valid());
-  CPPUNIT_ASSERT(x7.valid());
-  CPPUNIT_ASSERT(x8.valid());
-  CPPUNIT_ASSERT(x9.valid());
-  CPPUNIT_ASSERT(x10.valid());
-}
-
-void BasicAmountTestCase::testAbs()
-{
-  amount_t x0;
-  amount_t x1(-1234L);
-  amount_t x2(1234L);
-
-  assertEqual(amount_t(), x0.abs());
-  assertEqual(amount_t(1234L), x1.abs());
-  assertEqual(amount_t(1234L), x2.abs());
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-}
-
-void BasicAmountTestCase::testFractionalRound()
-{
-  amount_t x1("1234.567890");
-
-  assertEqual(amount_t("1234.56789"), x1.round(6));
-  assertEqual(amount_t("1234.56789"), x1.round(5));
-  assertEqual(amount_t("1234.5679"), x1.round(4));
-  assertEqual(amount_t("1234.568"), x1.round(3));
-  assertEqual(amount_t("1234.57"), x1.round(2));
-  assertEqual(amount_t("1234.6"), x1.round(1));
-  assertEqual(amount_t("1235"), x1.round(0));
-
-  amount_t x2("9876.543210");
-
-  assertEqual(amount_t("9876.543210"), x2.round(6));
-  assertEqual(amount_t("9876.54321"), x2.round(5));
-  assertEqual(amount_t("9876.5432"), x2.round(4));
-  assertEqual(amount_t("9876.543"), x2.round(3));
-  assertEqual(amount_t("9876.54"), x2.round(2));
-  assertEqual(amount_t("9876.5"), x2.round(1));
-  assertEqual(amount_t("9877"), x2.round(0));
-
-  amount_t x3("-1234.567890");
-
-  assertEqual(amount_t("-1234.56789"), x3.round(6));
-  assertEqual(amount_t("-1234.56789"), x3.round(5));
-  assertEqual(amount_t("-1234.5679"), x3.round(4));
-  assertEqual(amount_t("-1234.568"), x3.round(3));
-  assertEqual(amount_t("-1234.57"), x3.round(2));
-  assertEqual(amount_t("-1234.6"), x3.round(1));
-  assertEqual(amount_t("-1235"), x3.round(0));
-
-  amount_t x4("-9876.543210");
-
-  assertEqual(amount_t("-9876.543210"), x4.round(6));
-  assertEqual(amount_t("-9876.54321"), x4.round(5));
-  assertEqual(amount_t("-9876.5432"), x4.round(4));
-  assertEqual(amount_t("-9876.543"), x4.round(3));
-  assertEqual(amount_t("-9876.54"), x4.round(2));
-  assertEqual(amount_t("-9876.5"), x4.round(1));
-  assertEqual(amount_t("-9877"), x4.round(0));
-
-  amount_t x5("0.0000000000000000000000000000000000001");
-
-  assertEqual(amount_t("0.0000000000000000000000000000000000001"),
-	      x5.round(37));
-  assertEqual(amount_t(), x5.round(36));
-
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-  CPPUNIT_ASSERT(x3.valid());
-  CPPUNIT_ASSERT(x4.valid());
-}
-
-void BasicAmountTestCase::testReduction()
-{
-  amount_t x1("60s");
-  amount_t x2("600s");
-  amount_t x3("6000s");
-  amount_t x4("360000s");
-  amount_t x5("10m");		// 600s
-  amount_t x6("100m");		// 6000s
-  amount_t x7("1000m");		// 60000s
-  amount_t x8("10000m");	// 600000s
-  amount_t x9("10h");		// 36000s
-  amount_t x10("100h");		// 360000s
-  amount_t x11("1000h");	// 3600000s
-  amount_t x12("10000h");	// 36000000s
-
-  assertEqual(x2, x5);
-  assertEqual(x3, x6);
-  assertEqual(x4, x10);
-}
-
-void BasicAmountTestCase::testSign()
-{
-  amount_t x0;
-  amount_t x1("0.0000000000000000000000000000000000001");
-  amount_t x2("-0.0000000000000000000000000000000000001");
-  amount_t x3("1");
-  amount_t x4("-1");
-
-  CPPUNIT_ASSERT(! x0.sign());
-  CPPUNIT_ASSERT(x1.sign() > 0);
-  CPPUNIT_ASSERT(x2.sign() < 0);
-  CPPUNIT_ASSERT(x3.sign() > 0);
-  CPPUNIT_ASSERT(x4.sign() < 0);
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-  CPPUNIT_ASSERT(x3.valid());
-  CPPUNIT_ASSERT(x4.valid());
-}
-
-void BasicAmountTestCase::testTruth()
-{
-  amount_t x0;
-  amount_t x1("1234");
-  amount_t x2("1234.56");
-
-  if (x0)
-    CPPUNIT_ASSERT(false);
-  else
-    CPPUNIT_ASSERT(true);
-
-  if (x1)
-    CPPUNIT_ASSERT(true);
-  else
-    CPPUNIT_ASSERT(false);
-
-  if (x2)
-    CPPUNIT_ASSERT(true);
-  else
-    CPPUNIT_ASSERT(false);
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-  CPPUNIT_ASSERT(x2.valid());
-}
-
-void BasicAmountTestCase::testForZero()
-{
-  amount_t x0;
-  amount_t x1("0.000000000000000000001");
-
-  CPPUNIT_ASSERT(! x0);
-  CPPUNIT_ASSERT(x1);
-  CPPUNIT_ASSERT(x0.is_zero());
-  CPPUNIT_ASSERT(x0.is_realzero());
-  CPPUNIT_ASSERT(! x1.is_zero());
-  CPPUNIT_ASSERT(! x1.is_realzero());
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-}
-
-void BasicAmountTestCase::testIntegerConversion()
-{
-  amount_t x1(123456L);
-
-  assertEqual(true, bool(x1));
-  assertEqual(123456L, x1.to_long());
-  assertEqual(123456.0, x1.to_double());
-  assertEqual(string("123456"), x1.to_string());
-  assertEqual(string("123456"), x1.quantity_string());
-
-  CPPUNIT_ASSERT(x1.valid());
-}
-
-void BasicAmountTestCase::testFractionalConversion()
-{
-  amount_t x1(1234.56);
-
-  assertEqual(true, bool(x1));
-  assertThrow(x1.to_long(), amount_error); // loses precision
-  assertEqual(1234L, x1.to_long(true));
-  assertEqual(1234.56, x1.to_double());
-  assertEqual(string("1234.56"), x1.to_string());
-  assertEqual(string("1234.56"), x1.quantity_string());
-
-  CPPUNIT_ASSERT(x1.valid());
-}
-
-void BasicAmountTestCase::testPrinting()
-{
-  amount_t x0;
-  amount_t x1("982340823.380238098235098235098235098");
-
-  {
-    std::ostringstream bufstr;
-    bufstr << x0;
-
-    assertEqual(std::string("0"), bufstr.str());
-  }
-
-  {
-    std::ostringstream bufstr;
-    bufstr << x1;
-
-    assertEqual(std::string("982340823.380238098235098235098235098"),
-		bufstr.str());
-  }
-
-  CPPUNIT_ASSERT(x0.valid());
-  CPPUNIT_ASSERT(x1.valid());
-}
-
-void BasicAmountTestCase::testCommodityConstructors()
+void AmountTestCase::testCommodityConstructors()
 {
   amount_t x1("$123.45");
   amount_t x2("-$123.45");
@@ -711,62 +107,61 @@ void BasicAmountTestCase::testCommodityConstructors()
   assertValid(x10);
 }
 
-void BasicAmountTestCase::testCommodityNegation()
+void AmountTestCase::testAssignment()
 {
-  amount_t x1("$123.45");
-  amount_t x2("-$123.45");
-  amount_t x3("$-123.45");
-  amount_t x4("DM 123.45");
-  amount_t x5("-DM 123.45");
-  amount_t x6("DM -123.45");
-  amount_t x7("123.45 euro");
-  amount_t x8("-123.45 euro");
-  amount_t x9("123.45€");
-  amount_t x10("-123.45€");
-
-  assertEqual(amount_t("$-123.45"), - x1);
-  assertEqual(amount_t("$123.45"), - x2);
-  assertEqual(amount_t("$123.45"), - x3);
-  assertEqual(amount_t("DM -123.45"), - x4);
-  assertEqual(amount_t("DM 123.45"), - x5);
-  assertEqual(amount_t("DM 123.45"), - x6);
-  assertEqual(amount_t("-123.45 euro"), - x7);
-  assertEqual(amount_t("123.45 euro"), - x8);
-  assertEqual(amount_t("-123.45€"), - x9);
-  assertEqual(amount_t("123.45€"), - x10);
+  amount_t x0;
+  amount_t x1  = 123456L;
+  amount_t x2  = 123456UL;
+  amount_t x3  = 123.456;
+  amount_t x5  = "123456";
+  amount_t x6  = "123.456";
+  amount_t x7  = string("123456");
+  amount_t x8  = string("123.456");
+  amount_t x9  = x3;
+  amount_t x10 = amount_t(x6);
 
-  assertEqual(amount_t("$-123.45"), x1.negate());
-  assertEqual(amount_t("$123.45"), x2.negate());
-  assertEqual(amount_t("$123.45"), x3.negate());
+  assertEqual(amount_t(0L), x0);
+  assertEqual(x2, x1);
+  assertEqual(x5, x1);
+  assertEqual(x7, x1);
+  assertEqual(x6, x3);
+  assertEqual(x8, x3);
+  assertEqual(x10, x3);
+  assertEqual(x10, x9);
 
-  assertEqual(string("$-123.45"), (- x1).to_string());
-  assertEqual(string("$123.45"), (- x2).to_string());
-  assertEqual(string("$123.45"), (- x3).to_string());
-  assertEqual(string("DM -123.45"), (- x4).to_string());
-  assertEqual(string("DM 123.45"), (- x5).to_string());
-  assertEqual(string("DM 123.45"), (- x6).to_string());
-  assertEqual(string("-123.45 euro"), (- x7).to_string());
-  assertEqual(string("123.45 euro"), (- x8).to_string());
-  assertEqual(string("-123.45€"), (- x9).to_string());
-  assertEqual(string("123.45€"), (- x10).to_string());
+  x0  = amount_t();
+  x1  = 123456L;
+  x2  = 123456UL;
+  x3  = 123.456;
+  x5  = "123456";
+  x6  = "123.456";
+  x7  = string("123456");
+  x8  = string("123.456");
+  x9  = x3;
+  x10 = amount_t(x6);
 
-  assertEqual(amount_t("$-123.45"), x1.negate());
-  assertEqual(amount_t("$123.45"), x2.negate());
-  assertEqual(amount_t("$123.45"), x3.negate());
+  assertEqual(amount_t(0L), x0);
+  assertEqual(x2, x1);
+  assertEqual(x5, x1);
+  assertEqual(x7, x1);
+  assertEqual(x6, x3);
+  assertEqual(x8, x3);
+  assertEqual(x10, x3);
+  assertEqual(x10, x9);
 
-  assertValid(x1);
-  assertValid(x2);
-  assertValid(x3);
-  assertValid(x4);
-  assertValid(x5);
-  assertValid(x6);
-  assertValid(x7);
-  assertValid(x8);
-  assertValid(x9);
-  assertValid(x10);
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+  assertTrue(x3.valid());
+  assertTrue(x5.valid());
+  assertTrue(x6.valid());
+  assertTrue(x7.valid());
+  assertTrue(x8.valid());
+  assertTrue(x9.valid());
+  assertTrue(x10.valid());
 }
 
-void BasicAmountTestCase::testCommodityAssignment()
+void AmountTestCase::testCommodityAssignment()
 {
   amount_t x1  = "$123.45";
   amount_t x2  = "-$123.45";
@@ -813,7 +208,31 @@ void BasicAmountTestCase::testCommodityAssignment()
   assertValid(x10);
 }
 
-void BasicAmountTestCase::testCommodityEquality()
+void AmountTestCase::testEquality()
+{
+  amount_t x1(123456L);
+  amount_t x2(456789L);
+  amount_t x3(333333L);
+  amount_t x4(123456.0);
+  amount_t x5("123456.0");
+  amount_t x6(123456.0F);
+
+  assertTrue(x1 == 123456L);
+  assertTrue(x1 != x2);
+  assertTrue(x1 == (x2 - x3));
+  assertTrue(x1 == x4);
+  assertTrue(x4 == x5);
+  assertTrue(x4 == x6);
+
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+  assertTrue(x3.valid());
+  assertTrue(x4.valid());
+  assertTrue(x5.valid());
+  assertTrue(x6.valid());
+}
+
+void AmountTestCase::testCommodityEquality()
 {
   amount_t x0;
   amount_t x1  = "$123.45";
@@ -858,7 +277,128 @@ void BasicAmountTestCase::testCommodityEquality()
   assertValid(x10);
 }
 
-void BasicAmountTestCase::testCommodityAddition()
+void AmountTestCase::testComparisons()
+{
+  amount_t x0;
+  amount_t x1(-123L);
+  amount_t x2(123L);
+  amount_t x3(-123.45);
+  amount_t x4(123.45);
+  amount_t x5("-123.45");
+  amount_t x6("123.45");
+
+  assertTrue(x0 > x1);
+  assertTrue(x0 < x2);
+  assertTrue(x0 > x3);
+  assertTrue(x0 < x4);
+  assertTrue(x0 > x5);
+  assertTrue(x0 < x6);
+
+  assertTrue(x1 > x3);
+  assertTrue(x3 <= x5);
+  assertTrue(x3 >= x5);
+  assertTrue(x3 < x1);
+  assertTrue(x3 < x4);
+
+  assertTrue(x1 < 100L);
+  assertTrue(x1 < 100UL);
+  assertTrue(x1 < 100.0);
+  assertTrue(100L > x1);
+  assertTrue(100UL > x1);
+  assertTrue(100.0 > x1);
+
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+  assertTrue(x3.valid());
+  assertTrue(x4.valid());
+  assertTrue(x5.valid());
+  assertTrue(x6.valid());
+}
+
+void AmountTestCase::testCommodityComparisons()
+{
+  amount_t x0;
+  amount_t x1("$-123");
+  amount_t x2("$123.00");
+  amount_t x3(internalAmount("$-123.4544"));
+  amount_t x4(internalAmount("$123.4544"));
+  amount_t x5("$-123.45");
+  amount_t x6("$123.45");
+
+  assertTrue(x0 > x1);
+  assertTrue(x0 < x2);
+  assertTrue(x0 > x3);
+  assertTrue(x0 < x4);
+  assertTrue(x0 > x5);
+  assertTrue(x0 < x6);
+
+  assertTrue(x1 > x3);
+  assertTrue(x3 <= x5);
+  assertTrue(x3 < x5);
+  assertTrue(x3 <= x5);
+  assertFalse(x3 == x5);
+  assertTrue(x3 < x1);
+  assertTrue(x3 < x4);
+
+  assertValid(x0);
+  assertValid(x1);
+  assertValid(x2);
+  assertValid(x3);
+  assertValid(x4);
+  assertValid(x5);
+  assertValid(x6);
+}
+
+void AmountTestCase::testIntegerAddition()
+{
+  amount_t x1(123L);
+  amount_t y1(456L);
+
+  assertEqual(amount_t(579L), x1 + y1);
+  assertEqual(amount_t(579L), x1 + 456L);
+  assertEqual(amount_t(579L), 456L + x1);
+
+  x1 += amount_t(456L);
+  assertEqual(amount_t(579L), x1);
+  x1 += 456L;
+  assertEqual(amount_t(1035L), x1);
+
+  amount_t x4("123456789123456789123456789");
+
+  assertEqual(amount_t("246913578246913578246913578"), x4 + x4);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x4.valid());
+}
+
+void AmountTestCase::testFractionalAddition()
+{
+  amount_t x1(123.123);
+  amount_t y1(456.456);
+
+  assertEqual(amount_t(579.579), x1 + y1);
+  assertEqual(amount_t(579.579), x1 + 456.456);
+  assertEqual(amount_t(579.579), 456.456 + x1);
+
+  x1 += amount_t(456.456);
+  assertEqual(amount_t(579.579), x1);
+  x1 += 456.456;
+  assertEqual(amount_t(1036.035), x1);
+  x1 += 456L;
+  assertEqual(amount_t(1492.035), x1);
+
+  amount_t x2("123456789123456789.123456789123456789");
+
+  assertEqual(amount_t("246913578246913578.246913578246913578"), x2 + x2);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x2.valid());
+}
+
+void AmountTestCase::testCommodityAddition()
 {
   amount_t x0;
   amount_t x1("$123.45");
@@ -912,7 +452,61 @@ void BasicAmountTestCase::testCommodityAddition()
   assertValid(x7);
 }
 
-void BasicAmountTestCase::testCommoditySubtraction()
+void AmountTestCase::testIntegerSubtraction()
+{
+  amount_t x1(123L);
+  amount_t y1(456L);
+
+  assertEqual(amount_t(333L), y1 - x1);
+  assertEqual(amount_t(-333L), x1 - y1);
+  assertEqual(amount_t(23L), x1 - 100L);
+  assertEqual(amount_t(-23L), 100L - x1);
+
+  x1 -= amount_t(456L);
+  assertEqual(amount_t(-333L), x1);
+  x1 -= 456L;
+  assertEqual(amount_t(-789L), x1);
+
+  amount_t x4("123456789123456789123456789");
+  amount_t y4("8238725986235986");
+
+  assertEqual(amount_t("123456789115218063137220803"), x4 - y4);
+  assertEqual(amount_t("-123456789115218063137220803"), y4 - x4);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x4.valid());
+  assertTrue(y4.valid());
+}
+
+void AmountTestCase::testFractionalSubtraction()
+{
+  amount_t x1(123.123);
+  amount_t y1(456.456);
+
+  assertEqual(amount_t(-333.333), x1 - y1);
+  assertEqual(amount_t(333.333), y1 - x1);
+
+  x1 -= amount_t(456.456);
+  assertEqual(amount_t(-333.333), x1);
+  x1 -= 456.456;
+  assertEqual(amount_t(-789.789), x1);
+  x1 -= 456L;
+  assertEqual(amount_t(-1245.789), x1);
+
+  amount_t x2("123456789123456789.123456789123456789");
+  amount_t y2("9872345982459.248974239578");
+
+  assertEqual(amount_t("123446916777474329.874482549545456789"), x2 - y2);
+  assertEqual(amount_t("-123446916777474329.874482549545456789"), y2 - x2);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x2.valid());
+  assertTrue(y2.valid());
+}
+
+void AmountTestCase::testCommoditySubtraction()
 {
   amount_t x0;
   amount_t x1("$123.45");
@@ -991,7 +585,79 @@ void BasicAmountTestCase::testCommoditySubtraction()
   assertValid(x8);
 }
 
-void BasicAmountTestCase::testCommodityMultiplication()
+void AmountTestCase::testIntegerMultiplication()
+{
+  amount_t x1(123L);
+  amount_t y1(456L);
+
+  assertEqual(amount_t(0L), x1 * 0L);
+  assertEqual(amount_t(0L), amount_t(0L) * x1);
+  assertEqual(amount_t(0L), 0L * x1);
+  assertEqual(x1, x1 * 1L);
+  assertEqual(x1, amount_t(1L) * x1);
+  assertEqual(x1, 1L * x1);
+  assertEqual(- x1, x1 * -1L);
+  assertEqual(- x1, amount_t(-1L) * x1);
+  assertEqual(- x1, -1L * x1);
+  assertEqual(amount_t(56088L), x1 * y1);
+  assertEqual(amount_t(56088L), y1 * x1);
+  assertEqual(amount_t(56088L), x1 * 456L);
+  assertEqual(amount_t(56088L), amount_t(456L) * x1);
+  assertEqual(amount_t(56088L), 456L * x1);
+
+  x1 *= amount_t(123L);
+  assertEqual(amount_t(15129L), x1);
+  x1 *= 123L;
+  assertEqual(amount_t(1860867L), x1);
+
+  amount_t x4("123456789123456789123456789");
+
+  assertEqual(amount_t("15241578780673678546105778281054720515622620750190521"),
+	      x4 * x4);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x4.valid());
+}
+
+void AmountTestCase::testFractionalMultiplication()
+{
+  amount_t x1(123.123);
+  amount_t y1(456.456);
+
+  assertEqual(amount_t(0L), x1 * 0L);
+  assertEqual(amount_t(0L), amount_t(0L) * x1);
+  assertEqual(amount_t(0L), 0L * x1);
+  assertEqual(x1, x1 * 1L);
+  assertEqual(x1, amount_t(1L) * x1);
+  assertEqual(x1, 1L * x1);
+  assertEqual(- x1, x1 * -1L);
+  assertEqual(- x1, amount_t(-1L) * x1);
+  assertEqual(- x1, -1L * x1);
+  assertEqual(amount_t("56200.232088"), x1 * y1);
+  assertEqual(amount_t("56200.232088"), y1 * x1);
+  assertEqual(amount_t("56200.232088"), x1 * 456.456);
+  assertEqual(amount_t("56200.232088"), amount_t(456.456) * x1);
+  assertEqual(amount_t("56200.232088"), 456.456 * x1);
+
+  x1 *= amount_t(123.123);
+  assertEqual(amount_t("15159.273129"), x1);
+  x1 *= 123.123;
+  assertEqual(amount_t("1866455.185461867"), x1);
+  x1 *= 123L;
+  assertEqual(amount_t("229573987.811809641"), x1);
+
+  amount_t x2("123456789123456789.123456789123456789");
+
+  assertEqual(amount_t("15241578780673678546105778311537878.046486820281054720515622620750190521"),
+	      x2 * x2);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x2.valid());
+}
+
+void AmountTestCase::testCommodityMultiplication()
 {
   amount_t x1("$123.12");
   amount_t y1("$456.45");
@@ -1045,7 +711,83 @@ void BasicAmountTestCase::testCommodityMultiplication()
   assertValid(x7);
 }
 
-void BasicAmountTestCase::testCommodityDivision()
+void AmountTestCase::testIntegerDivision()
+{
+  amount_t x1(123L);
+  amount_t y1(456L);
+
+  assertThrow(x1 / 0L, amount_error);
+  assertEqual(amount_t(0L), amount_t(0L) / x1);
+  assertEqual(amount_t(0L), 0L / x1);
+  assertEqual(x1, x1 / 1L);
+  assertEqual(amount_t("0.008130"), amount_t(1L) / x1);
+  assertEqual(amount_t("0.008130"), 1L / x1);
+  assertEqual(- x1, x1 / -1L);
+  assertEqual(- amount_t("0.008130"), amount_t(-1L) / x1);
+  assertEqual(- amount_t("0.008130"), -1L / x1);
+  assertEqual(amount_t("0.269737"), x1 / y1);
+  assertEqual(amount_t("3.707317"), y1 / x1);
+  assertEqual(amount_t("0.269737"), x1 / 456L);
+  assertEqual(amount_t("3.707317"), amount_t(456L) / x1);
+  assertEqual(amount_t("3.707317"), 456L / x1);
+
+  x1 /= amount_t(456L);
+  assertEqual(amount_t("0.269737"), x1);
+  x1 /= 456L;
+  assertEqual(amount_t("0.00059152850877193"), x1);
+
+  amount_t x4("123456789123456789123456789");
+  amount_t y4("56");
+
+  assertEqual(amount_t(1L), x4 / x4);
+  assertEqual(amount_t("2204585520061728377204585.517857"), x4 / y4);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x4.valid());
+  assertTrue(y4.valid());
+}
+
+void AmountTestCase::testFractionalDivision()
+{
+  amount_t x1(123.123);
+  amount_t y1(456.456);
+
+  assertThrow(x1 / 0L, amount_error);
+  assertEqual(amount_t("0.008121959"), amount_t(1.0) / x1);
+  assertEqual(amount_t("0.008121959"), 1.0 / x1);
+  assertEqual(x1, x1 / 1.0);
+  assertEqual(amount_t("0.008121959"), amount_t(1.0) / x1);
+  assertEqual(amount_t("0.008121959"), 1.0 / x1);
+  assertEqual(- x1, x1 / -1.0);
+  assertEqual(- amount_t("0.008121959"), amount_t(-1.0) / x1);
+  assertEqual(- amount_t("0.008121959"), -1.0 / x1);
+  assertEqual(amount_t("0.269736842105263"), x1 / y1);
+  assertEqual(amount_t("3.707317073170732"), y1 / x1);
+  assertEqual(amount_t("0.269736842105263"), x1 / 456.456);
+  assertEqual(amount_t("3.707317073170732"), amount_t(456.456) / x1);
+  assertEqual(amount_t("3.707317073170732"), 456.456 / x1);
+
+  x1 /= amount_t(456.456);
+  assertEqual(amount_t("0.269736842105263"), x1);
+  x1 /= 456.456;
+  assertEqual(amount_t("0.000590937225286255411255411255411255411"), x1);
+  x1 /= 456L;
+  assertEqual(amount_t("0.000001295914967733016252753094858358016252192982456140350877192982456140350877192982"), x1);
+
+  amount_t x4("1234567891234567.89123456789");
+  amount_t y4("56.789");
+
+  assertEqual(amount_t(1.0), x4 / x4);
+  assertEqual(amount_t("21739560323910.7554497273748437197344556164046"), x4 / y4);
+
+  assertTrue(x1.valid());
+  assertTrue(y1.valid());
+  assertTrue(x4.valid());
+  assertTrue(y4.valid());
+}
+
+void AmountTestCase::testCommodityDivision()
 {
   amount_t x1("$123.12");
   amount_t y1("$456.45");
@@ -1104,21 +846,181 @@ void BasicAmountTestCase::testCommodityDivision()
   assertValid(x7);
 }
 
-void BasicAmountTestCase::testCommodityConversion()
+void AmountTestCase::testNegation()
 {
-  amount_t x1("$1234.56");
+  amount_t x0;
+  amount_t x1(-123456L);
+  amount_t x3(-123.456);
+  amount_t x5("-123456");
+  amount_t x6("-123.456");
+  amount_t x7(string("-123456"));
+  amount_t x8(string("-123.456"));
+  amount_t x9(- x3);
 
-  assertEqual(true, bool(x1));
-  assertThrow(x1.to_long(), amount_error); // loses precision
-  assertEqual(1234L, x1.to_long(true));
-  assertEqual(1234.56, x1.to_double());
-  assertEqual(string("$1234.56"), x1.to_string());
-  assertEqual(string("1234.56"), x1.quantity_string());
+  assertEqual(amount_t(0L), x0);
+  assertEqual(x5, x1);
+  assertEqual(x7, x1);
+  assertEqual(x6, x3);
+  assertEqual(x8, x3);
+  assertEqual(- x6, x9);
+  assertEqual(x3.negate(), x9);
+
+  amount_t x10(x9.negate());
+
+  assertEqual(x3, x10);
+
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+  assertTrue(x3.valid());
+  assertTrue(x5.valid());
+  assertTrue(x6.valid());
+  assertTrue(x7.valid());
+  assertTrue(x8.valid());
+  assertTrue(x9.valid());
+  assertTrue(x10.valid());
+}
+
+void AmountTestCase::testCommodityNegation()
+{
+  amount_t x1("$123.45");
+  amount_t x2("-$123.45");
+  amount_t x3("$-123.45");
+  amount_t x4("DM 123.45");
+  amount_t x5("-DM 123.45");
+  amount_t x6("DM -123.45");
+  amount_t x7("123.45 euro");
+  amount_t x8("-123.45 euro");
+  amount_t x9("123.45€");
+  amount_t x10("-123.45€");
+
+  assertEqual(amount_t("$-123.45"), - x1);
+  assertEqual(amount_t("$123.45"), - x2);
+  assertEqual(amount_t("$123.45"), - x3);
+  assertEqual(amount_t("DM -123.45"), - x4);
+  assertEqual(amount_t("DM 123.45"), - x5);
+  assertEqual(amount_t("DM 123.45"), - x6);
+  assertEqual(amount_t("-123.45 euro"), - x7);
+  assertEqual(amount_t("123.45 euro"), - x8);
+  assertEqual(amount_t("-123.45€"), - x9);
+  assertEqual(amount_t("123.45€"), - x10);
+
+  assertEqual(amount_t("$-123.45"), x1.negate());
+  assertEqual(amount_t("$123.45"), x2.negate());
+  assertEqual(amount_t("$123.45"), x3.negate());
+
+  assertEqual(string("$-123.45"), (- x1).to_string());
+  assertEqual(string("$123.45"), (- x2).to_string());
+  assertEqual(string("$123.45"), (- x3).to_string());
+  assertEqual(string("DM -123.45"), (- x4).to_string());
+  assertEqual(string("DM 123.45"), (- x5).to_string());
+  assertEqual(string("DM 123.45"), (- x6).to_string());
+  assertEqual(string("-123.45 euro"), (- x7).to_string());
+  assertEqual(string("123.45 euro"), (- x8).to_string());
+  assertEqual(string("-123.45€"), (- x9).to_string());
+  assertEqual(string("123.45€"), (- x10).to_string());
+
+  assertEqual(amount_t("$-123.45"), x1.negate());
+  assertEqual(amount_t("$123.45"), x2.negate());
+  assertEqual(amount_t("$123.45"), x3.negate());
 
   assertValid(x1);
+  assertValid(x2);
+  assertValid(x3);
+  assertValid(x4);
+  assertValid(x5);
+  assertValid(x6);
+  assertValid(x7);
+  assertValid(x8);
+  assertValid(x9);
+  assertValid(x10);
 }
 
-void BasicAmountTestCase::testCommodityRound()
+void AmountTestCase::testAbs()
+{
+  amount_t x0;
+  amount_t x1(-1234L);
+  amount_t x2(1234L);
+
+  assertEqual(amount_t(), x0.abs());
+  assertEqual(amount_t(1234L), x1.abs());
+  assertEqual(amount_t(1234L), x2.abs());
+
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+}
+
+void AmountTestCase::testCommodityAbs()
+{
+  amount_t x0;
+  amount_t x1("$-1234.56");
+  amount_t x2("$1234.56");
+
+  assertEqual(amount_t(), x0.abs());
+  assertEqual(amount_t("$1234.56"), x1.abs());
+  assertEqual(amount_t("$1234.56"), x2.abs());
+
+  assertValid(x0);
+  assertValid(x1);
+  assertValid(x2);
+}
+
+void AmountTestCase::testFractionalRound()
+{
+  amount_t x1("1234.567890");
+
+  assertEqual(amount_t("1234.56789"), x1.round(6));
+  assertEqual(amount_t("1234.56789"), x1.round(5));
+  assertEqual(amount_t("1234.5679"), x1.round(4));
+  assertEqual(amount_t("1234.568"), x1.round(3));
+  assertEqual(amount_t("1234.57"), x1.round(2));
+  assertEqual(amount_t("1234.6"), x1.round(1));
+  assertEqual(amount_t("1235"), x1.round(0));
+
+  amount_t x2("9876.543210");
+
+  assertEqual(amount_t("9876.543210"), x2.round(6));
+  assertEqual(amount_t("9876.54321"), x2.round(5));
+  assertEqual(amount_t("9876.5432"), x2.round(4));
+  assertEqual(amount_t("9876.543"), x2.round(3));
+  assertEqual(amount_t("9876.54"), x2.round(2));
+  assertEqual(amount_t("9876.5"), x2.round(1));
+  assertEqual(amount_t("9877"), x2.round(0));
+
+  amount_t x3("-1234.567890");
+
+  assertEqual(amount_t("-1234.56789"), x3.round(6));
+  assertEqual(amount_t("-1234.56789"), x3.round(5));
+  assertEqual(amount_t("-1234.5679"), x3.round(4));
+  assertEqual(amount_t("-1234.568"), x3.round(3));
+  assertEqual(amount_t("-1234.57"), x3.round(2));
+  assertEqual(amount_t("-1234.6"), x3.round(1));
+  assertEqual(amount_t("-1235"), x3.round(0));
+
+  amount_t x4("-9876.543210");
+
+  assertEqual(amount_t("-9876.543210"), x4.round(6));
+  assertEqual(amount_t("-9876.54321"), x4.round(5));
+  assertEqual(amount_t("-9876.5432"), x4.round(4));
+  assertEqual(amount_t("-9876.543"), x4.round(3));
+  assertEqual(amount_t("-9876.54"), x4.round(2));
+  assertEqual(amount_t("-9876.5"), x4.round(1));
+  assertEqual(amount_t("-9877"), x4.round(0));
+
+  amount_t x5("0.0000000000000000000000000000000000001");
+
+  assertEqual(amount_t("0.0000000000000000000000000000000000001"),
+	      x5.round(37));
+  assertEqual(amount_t(), x5.round(36));
+
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+  assertTrue(x3.valid());
+  assertTrue(x4.valid());
+  assertTrue(x5.valid());
+}
+
+void AmountTestCase::testCommodityRound()
 {
   amount_t x1(internalAmount("$1234.567890"));
 
@@ -1176,7 +1078,7 @@ void BasicAmountTestCase::testCommodityRound()
   assertValid(x5);
 }
 
-void BasicAmountTestCase::testCommodityDisplayRound()
+void AmountTestCase::testCommodityDisplayRound()
 {
   amount_t x1("$0.85");
   amount_t x2("$0.1");
@@ -1198,26 +1100,123 @@ void BasicAmountTestCase::testCommodityDisplayRound()
   assertEqual(string("$1.13"), x1.to_string());
 }
 
-void BasicAmountTestCase::testCommodityTruth()
+void AmountTestCase::testReduction()
+{
+  amount_t x1("60s");
+  amount_t x2("600s");
+  amount_t x3("6000s");
+  amount_t x4("360000s");
+  amount_t x5("10m");		// 600s
+  amount_t x6("100m");		// 6000s
+  amount_t x7("1000m");		// 60000s
+  amount_t x8("10000m");	// 600000s
+  amount_t x9("10h");		// 36000s
+  amount_t x10("100h");		// 360000s
+  amount_t x11("1000h");	// 3600000s
+  amount_t x12("10000h");	// 36000000s
+
+  assertEqual(x2, x5);
+  assertEqual(x3, x6);
+  assertEqual(x4, x10);
+}
+
+void AmountTestCase::testSign()
+{
+  amount_t x0;
+  amount_t x1("0.0000000000000000000000000000000000001");
+  amount_t x2("-0.0000000000000000000000000000000000001");
+  amount_t x3("1");
+  amount_t x4("-1");
+
+  assertEqual(x0.sign(), 0);
+  assertTrue(x1.sign() > 0);
+  assertTrue(x2.sign() < 0);
+  assertTrue(x3.sign() > 0);
+  assertTrue(x4.sign() < 0);
+
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+  assertTrue(x3.valid());
+  assertTrue(x4.valid());
+}
+
+void AmountTestCase::testCommoditySign()
+{
+  amount_t x0;
+  amount_t x1(internalAmount("$0.0000000000000000000000000000000000001"));
+  amount_t x2(internalAmount("$-0.0000000000000000000000000000000000001"));
+  amount_t x3("$1");
+  amount_t x4("$-1");
+
+  assertFalse(x0.sign());
+  assertTrue(x1.sign() != 0);
+  assertTrue(x2.sign() != 0);
+  assertTrue(x3.sign() > 0);
+  assertTrue(x4.sign() < 0);
+
+  assertValid(x0);
+  assertValid(x1);
+  assertValid(x2);
+  assertValid(x3);
+  assertValid(x4);
+}
+
+void AmountTestCase::testTruth()
+{
+  amount_t x0;
+  amount_t x1("1234");
+  amount_t x2("1234.56");
+
+  if (x0)
+    assertTrue(false);
+  else
+    assertTrue(true);
+
+  assertTrue(x1);
+  assertTrue(x2);
+
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+  assertTrue(x2.valid());
+}
+
+void AmountTestCase::testCommodityTruth()
 {
   amount_t x1("$1234");
   amount_t x2("$1234.56");
 
   if (x1)
-    CPPUNIT_ASSERT(true);
+    assertTrue(true);
   else
-    CPPUNIT_ASSERT(false);
+    assertTrue(false);
 
   if (x2)
-    CPPUNIT_ASSERT(true);
+    assertTrue(true);
   else
-    CPPUNIT_ASSERT(false);
+    assertTrue(false);
 
   assertValid(x1);
   assertValid(x2);
 }
 
-void BasicAmountTestCase::testCommodityForZero()
+void AmountTestCase::testForZero()
+{
+  amount_t x0;
+  amount_t x1("0.000000000000000000001");
+
+  assertFalse(x0);
+  assertTrue(x1);
+  assertTrue(x0.is_zero());
+  assertTrue(x0.is_realzero());
+  assertFalse(x1.is_zero());
+  assertFalse(x1.is_realzero());
+
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
+}
+
+void AmountTestCase::testCommodityForZero()
 {
   amount_t x1(internalAmount("$0.000000000000000000001"));
 
@@ -1228,77 +1227,69 @@ void BasicAmountTestCase::testCommodityForZero()
   assertValid(x1);
 }
 
-void BasicAmountTestCase::testCommodityComparisons()
+void AmountTestCase::testIntegerConversion()
 {
-  amount_t x0;
-  amount_t x1("$-123");
-  amount_t x2("$123.00");
-  amount_t x3(internalAmount("$-123.4544"));
-  amount_t x4(internalAmount("$123.4544"));
-  amount_t x5("$-123.45");
-  amount_t x6("$123.45");
+  amount_t x1(123456L);
 
-  assertTrue(x0 > x1);
-  assertTrue(x0 < x2);
-  assertTrue(x0 > x3);
-  assertTrue(x0 < x4);
-  assertTrue(x0 > x5);
-  assertTrue(x0 < x6);
+  assertEqual(123456L, x1.to_long());
+  assertEqual(123456.0, x1.to_double());
+  assertEqual(string("123456"), x1.to_string());
+  assertEqual(string("123456"), x1.quantity_string());
 
-  assertTrue(x1 > x3);
-  assertTrue(x3 <= x5);
-  assertTrue(x3 < x5);
-  assertTrue(x3 <= x5);
-  assertFalse(x3 == x5);
-  assertTrue(x3 < x1);
-  assertTrue(x3 < x4);
+  assertTrue(x1.valid());
+}
 
-  assertValid(x0);
-  assertValid(x1);
-  assertValid(x2);
-  assertValid(x3);
-  assertValid(x4);
-  assertValid(x5);
-  assertValid(x6);
+void AmountTestCase::testFractionalConversion()
+{
+  amount_t x1(1234.56);
+
+  assertThrow(x1.to_long(), amount_error); // loses precision
+  assertEqual(1234L, x1.to_long(true));
+  assertEqual(1234.56, x1.to_double());
+  assertEqual(string("1234.56"), x1.to_string());
+  assertEqual(string("1234.56"), x1.quantity_string());
+
+  assertTrue(x1.valid());
 }
 
-void BasicAmountTestCase::testCommoditySign()
+void AmountTestCase::testCommodityConversion()
 {
-  amount_t x0;
-  amount_t x1(internalAmount("$0.0000000000000000000000000000000000001"));
-  amount_t x2(internalAmount("$-0.0000000000000000000000000000000000001"));
-  amount_t x3("$1");
-  amount_t x4("$-1");
+  amount_t x1("$1234.56");
 
-  assertFalse(x0.sign());
-  assertTrue(x1.sign() != 0);
-  assertTrue(x2.sign() != 0);
-  assertTrue(x3.sign() > 0);
-  assertTrue(x4.sign() < 0);
+  assertThrow(x1.to_long(), amount_error); // loses precision
+  assertEqual(1234L, x1.to_long(true));
+  assertEqual(1234.56, x1.to_double());
+  assertEqual(string("$1234.56"), x1.to_string());
+  assertEqual(string("1234.56"), x1.quantity_string());
 
-  assertValid(x0);
   assertValid(x1);
-  assertValid(x2);
-  assertValid(x3);
-  assertValid(x4);
 }
 
-void BasicAmountTestCase::testCommodityAbs()
+void AmountTestCase::testPrinting()
 {
   amount_t x0;
-  amount_t x1("$-1234.56");
-  amount_t x2("$1234.56");
+  amount_t x1("982340823.380238098235098235098235098");
 
-  assertEqual(amount_t(), x0.abs());
-  assertEqual(amount_t("$1234.56"), x1.abs());
-  assertEqual(amount_t("$1234.56"), x2.abs());
+  {
+    std::ostringstream bufstr;
+    bufstr << x0;
 
-  assertValid(x0);
-  assertValid(x1);
-  assertValid(x2);
+    assertEqual(std::string("0"), bufstr.str());
+  }
+
+  {
+    std::ostringstream bufstr;
+    bufstr << x1;
+
+    assertEqual(std::string("982340823.380238098235098235098235098"),
+		bufstr.str());
+  }
+
+  assertTrue(x0.valid());
+  assertTrue(x1.valid());
 }
 
-void BasicAmountTestCase::testCommodityPrinting()
+void AmountTestCase::testCommodityPrinting()
 {
   amount_t x0;
   amount_t x1(internalAmount("$982340823.386238098235098235098235098"));
diff --git a/tests/numerics/t_amount.h b/tests/numerics/t_amount.h
index ee227a5c..0bf0017f 100644
--- a/tests/numerics/t_amount.h
+++ b/tests/numerics/t_amount.h
@@ -3,48 +3,48 @@
 
 #include "UnitTests.h"
 
-class BasicAmountTestCase : public CPPUNIT_NS::TestCase
+class AmountTestCase : public CPPUNIT_NS::TestCase
 {
-  CPPUNIT_TEST_SUITE(BasicAmountTestCase);
+  CPPUNIT_TEST_SUITE(AmountTestCase);
 
   CPPUNIT_TEST(testConstructors);
+  CPPUNIT_TEST(testCommodityConstructors);
   CPPUNIT_TEST(testAssignment);
+  CPPUNIT_TEST(testCommodityAssignment);
   CPPUNIT_TEST(testEquality);
+  CPPUNIT_TEST(testCommodityEquality);
   CPPUNIT_TEST(testComparisons);
+  CPPUNIT_TEST(testCommodityComparisons);
   CPPUNIT_TEST(testIntegerAddition);
   CPPUNIT_TEST(testFractionalAddition);
+  CPPUNIT_TEST(testCommodityAddition);
   CPPUNIT_TEST(testIntegerSubtraction);
   CPPUNIT_TEST(testFractionalSubtraction);
+  CPPUNIT_TEST(testCommoditySubtraction);
   CPPUNIT_TEST(testIntegerMultiplication);
   CPPUNIT_TEST(testFractionalMultiplication);
+  CPPUNIT_TEST(testCommodityMultiplication);
   CPPUNIT_TEST(testIntegerDivision);
   CPPUNIT_TEST(testFractionalDivision);
+  CPPUNIT_TEST(testCommodityDivision);
   CPPUNIT_TEST(testNegation);
+  CPPUNIT_TEST(testCommodityNegation);
   CPPUNIT_TEST(testAbs);
+  CPPUNIT_TEST(testCommodityAbs);
   CPPUNIT_TEST(testFractionalRound);
+  CPPUNIT_TEST(testCommodityRound);
+  CPPUNIT_TEST(testCommodityDisplayRound);
   CPPUNIT_TEST(testReduction);
   CPPUNIT_TEST(testSign);
+  CPPUNIT_TEST(testCommoditySign);
   CPPUNIT_TEST(testTruth);
+  CPPUNIT_TEST(testCommodityTruth);
   CPPUNIT_TEST(testForZero);
+  CPPUNIT_TEST(testCommodityForZero);
   CPPUNIT_TEST(testIntegerConversion);
   CPPUNIT_TEST(testFractionalConversion);
-  CPPUNIT_TEST(testPrinting);
-  CPPUNIT_TEST(testCommodityConstructors);
-  CPPUNIT_TEST(testCommodityNegation);
-  CPPUNIT_TEST(testCommodityAssignment);
-  CPPUNIT_TEST(testCommodityEquality);
-  CPPUNIT_TEST(testCommodityAddition);
-  CPPUNIT_TEST(testCommoditySubtraction);
-  CPPUNIT_TEST(testCommodityMultiplication);
-  CPPUNIT_TEST(testCommodityDivision);
   CPPUNIT_TEST(testCommodityConversion);
-  CPPUNIT_TEST(testCommodityRound);
-  CPPUNIT_TEST(testCommodityDisplayRound);
-  CPPUNIT_TEST(testCommodityTruth);
-  CPPUNIT_TEST(testCommodityForZero);
-  CPPUNIT_TEST(testCommodityComparisons);
-  CPPUNIT_TEST(testCommoditySign);
-  CPPUNIT_TEST(testCommodityAbs);
+  CPPUNIT_TEST(testPrinting);
   CPPUNIT_TEST(testCommodityPrinting);
 
   CPPUNIT_TEST_SUITE_END();
@@ -52,55 +52,55 @@ class BasicAmountTestCase : public CPPUNIT_NS::TestCase
 public:
   ledger::session_t session;
 
-  BasicAmountTestCase() {}
-  virtual ~BasicAmountTestCase() {}
+  AmountTestCase() {}
+  virtual ~AmountTestCase() {}
 
   virtual void setUp();
   virtual void tearDown();
 
   void testConstructors();
+  void testCommodityConstructors();
   void testAssignment();
+  void testCommodityAssignment();
   void testEquality();
+  void testCommodityEquality();
   void testComparisons();
+  void testCommodityComparisons();
   void testIntegerAddition();
   void testFractionalAddition();
+  void testCommodityAddition();
   void testIntegerSubtraction();
   void testFractionalSubtraction();
+  void testCommoditySubtraction();
   void testIntegerMultiplication();
   void testFractionalMultiplication();
+  void testCommodityMultiplication();
   void testIntegerDivision();
   void testFractionalDivision();
+  void testCommodityDivision();
   void testNegation();
+  void testCommodityNegation();
   void testAbs();
+  void testCommodityAbs();
   void testFractionalRound();
+  void testCommodityRound();
+  void testCommodityDisplayRound();
   void testReduction();
   void testSign();
+  void testCommoditySign();
   void testTruth();
+  void testCommodityTruth();
   void testForZero();
+  void testCommodityForZero();
   void testIntegerConversion();
   void testFractionalConversion();
-  void testPrinting();
-  void testCommodityConstructors();
-  void testCommodityNegation();
-  void testCommodityAssignment();
-  void testCommodityEquality();
-  void testCommodityAddition();
-  void testCommoditySubtraction();
-  void testCommodityMultiplication();
-  void testCommodityDivision();
   void testCommodityConversion();
-  void testCommodityRound();
-  void testCommodityDisplayRound();
-  void testCommodityTruth();
-  void testCommodityForZero();
-  void testCommodityComparisons();
-  void testCommoditySign();
-  void testCommodityAbs();
+  void testPrinting();
   void testCommodityPrinting();
 
 private:
-  BasicAmountTestCase(const BasicAmountTestCase &copy);
-  void operator=(const BasicAmountTestCase &copy);
+  AmountTestCase(const AmountTestCase &copy);
+  void operator=(const AmountTestCase &copy);
 };
 
 #endif // _T_AMOUNT_H
diff --git a/tests/python/numerics/t_amount.py b/tests/python/numerics/t_amount.py
index 70ac0852..dd87b2cd 100644
--- a/tests/python/numerics/t_amount.py
+++ b/tests/python/numerics/t_amount.py
@@ -10,7 +10,6 @@ from ledger import amount
 
 internalAmount = amount.exact
 
-
 class AmountTestCase(unittest.TestCase):
     def setUp(self):
         # Cause the display precision for dollars to be initialized to 2.
@@ -35,6 +34,9 @@ class AmountTestCase(unittest.TestCase):
         x10 = amount(x6)
 
         self.assertEqual(amount(0), x0)
+        self.assertEqual(amount(), x0)
+        self.assertEqual(amount("0"), x0)
+        self.assertEqual(amount("0.0"), x0)
         self.assertEqual(x2, x1)
         self.assertEqual(x5, x1)
         self.assertEqual(x6, x3)
@@ -50,29 +52,48 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(x9)
         self.assertValid(x10)
 
-    def testNegation(self):
-        x0 = amount()
-        x1 = amount(-123456)
-        x3 = amount(-123.456)
-        x5 = amount("-123456")
-        x6 = amount("-123.456")
-        x9 = amount(- x3)
-
-        self.assertEqual(amount(0), x0)
-        self.assertEqual(x5, x1)
-        self.assertEqual(x6, x3)
-        self.assertEqual(- x6, x9)
-        self.assertEqual(x3.negate(), x9)
+    def testCommodityConstructors(self):
+        x1  = amount("$123.45")
+        x2  = amount("-$123.45")
+        x3  = amount("$-123.45")
+        x4  = amount("DM 123.45")
+        x5  = amount("-DM 123.45")
+        x6  = amount("DM -123.45")
+        x7  = amount("123.45 euro")
+        x8  = amount("-123.45 euro")
+        x9  = amount("123.45€")
+        x10 = amount("-123.45€")
 
-        x10 = amount(x9.negate())
+        self.assertEqual(amount("$123.45"), x1)
+        self.assertEqual(amount("-$123.45"), x2)
+        self.assertEqual(amount("$-123.45"), x3)
+        self.assertEqual(amount("DM 123.45"), x4)
+        self.assertEqual(amount("-DM 123.45"), x5)
+        self.assertEqual(amount("DM -123.45"), x6)
+        self.assertEqual(amount("123.45 euro"), x7)
+        self.assertEqual(amount("-123.45 euro"), x8)
+        self.assertEqual(amount("123.45€"), x9)
+        self.assertEqual(amount("-123.45€"), x10)
 
-        self.assertEqual(x3, x10)
+        self.assertEqual("$123.45", x1.to_string())
+        self.assertEqual("$-123.45", x2.to_string())
+        self.assertEqual("$-123.45", x3.to_string())
+        self.assertEqual("DM 123.45", x4.to_string())
+        self.assertEqual("DM -123.45", x5.to_string())
+        self.assertEqual("DM -123.45", x6.to_string())
+        self.assertEqual("123.45 euro", x7.to_string())
+        self.assertEqual("-123.45 euro", x8.to_string())
+        self.assertEqual("123.45€", x9.to_string())
+        self.assertEqual("-123.45€", x10.to_string())
 
-        self.assertValid(x0)
         self.assertValid(x1)
+        self.assertValid(x2)
         self.assertValid(x3)
+        self.assertValid(x4)
         self.assertValid(x5)
         self.assertValid(x6)
+        self.assertValid(x7)
+        self.assertValid(x8)
         self.assertValid(x9)
         self.assertValid(x10)
 
@@ -118,6 +139,51 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(x9)
         self.assertValid(x10)
 
+    def testCommodityAssignment(self):
+        x1 = amount("$123.45")
+        x2 = amount("-$123.45")
+        x3 = amount("$-123.45")
+        x4 = amount("DM 123.45")
+        x5 = amount("-DM 123.45")
+        x6 = amount("DM -123.45")
+        x7 = amount("123.45 euro")
+        x8 = amount("-123.45 euro")
+        x9 = amount("123.45€")
+        x10 = amount("-123.45€")
+
+        self.assertEqual(amount("$123.45"), x1)
+        self.assertEqual(amount("-$123.45"), x2)
+        self.assertEqual(amount("$-123.45"), x3)
+        self.assertEqual(amount("DM 123.45"), x4)
+        self.assertEqual(amount("-DM 123.45"), x5)
+        self.assertEqual(amount("DM -123.45"), x6)
+        self.assertEqual(amount("123.45 euro"), x7)
+        self.assertEqual(amount("-123.45 euro"), x8)
+        self.assertEqual(amount("123.45€"), x9)
+        self.assertEqual(amount("-123.45€"), x10)
+
+        self.assertEqual("$123.45", x1.to_string())
+        self.assertEqual("$-123.45", x2.to_string())
+        self.assertEqual("$-123.45", x3.to_string())
+        self.assertEqual("DM 123.45", x4.to_string())
+        self.assertEqual("DM -123.45", x5.to_string())
+        self.assertEqual("DM -123.45", x6.to_string())
+        self.assertEqual("123.45 euro", x7.to_string())
+        self.assertEqual("-123.45 euro", x8.to_string())
+        self.assertEqual("123.45€", x9.to_string())
+        self.assertEqual("-123.45€", x10.to_string())
+
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+        self.assertValid(x5)
+        self.assertValid(x6)
+        self.assertValid(x7)
+        self.assertValid(x8)
+        self.assertValid(x9)
+        self.assertValid(x10)
+
     def testEquality(self):
         x1 = amount(123456)
         x2 = amount(456789)
@@ -137,6 +203,118 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(x4)
         self.assertValid(x5)
 
+    def testCommodityEquality(self):
+        x0 = amount()
+        x1 = amount("$123.45")
+        x2 = amount("-$123.45")
+        x3 = amount("$-123.45")
+        x4 = amount("DM 123.45")
+        x5 = amount("-DM 123.45")
+        x6 = amount("DM -123.45")
+        x7 = amount("123.45 euro")
+        x8 = amount("-123.45 euro")
+        x9 = amount("123.45€")
+        x10 = amount("-123.45€")
+
+        self.assertTrue(x0.is_null())
+        self.assertTrue(x0.is_zero())
+        self.assertTrue(x0.is_realzero())
+        self.assertTrue(x0.sign() == 0)
+        self.assertTrue(x0.compare(x1) < 0)
+        self.assertTrue(x0.compare(x2) > 0)
+        self.assertTrue(x0.compare(x0) == 0)
+
+        self.assertTrue(x1 != x2)
+        self.assertTrue(x1 != x4)
+        self.assertTrue(x1 != x7)
+        self.assertTrue(x1 != x9)
+        self.assertTrue(x2 == x3)
+        self.assertTrue(x4 != x5)
+        self.assertTrue(x5 == x6)
+        self.assertTrue(x7 == - x8)
+        self.assertTrue(x9 == - x10)
+
+        self.assertValid(x0)
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+        self.assertValid(x5)
+        self.assertValid(x6)
+        self.assertValid(x7)
+        self.assertValid(x8)
+        self.assertValid(x9)
+        self.assertValid(x10)
+
+    def testComparisons(self):
+        x0 = amount()
+        x1 = amount(-123)
+        x2 = amount(123)
+        x3 = amount(-123.45)
+        x4 = amount(123.45)
+        x5 = amount("-123.45")
+        x6 = amount("123.45")
+
+        self.assertTrue(x0 > x1)
+        self.assertTrue(x0 < x2)
+        self.assertTrue(x0 > x3)
+        self.assertTrue(x0 < x4)
+        self.assertTrue(x0 > x5)
+        self.assertTrue(x0 < x6)
+
+        self.assertTrue(x1 > x3)
+        self.assertTrue(x3 <= x5)
+        self.assertTrue(x3 >= x5)
+        self.assertTrue(x3 < x1)
+        self.assertTrue(x3 < x4)
+
+        self.assertTrue(x1 < 100)
+        self.assertTrue(x1 < 100L)
+        self.assertTrue(x1 < 100.0)
+        self.assertTrue(100 > x1)
+        self.assertTrue(100L > x1)
+        self.assertTrue(100.0 > x1)
+
+        self.assertValid(x0)
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+        self.assertValid(x5)
+        self.assertValid(x6)
+
+    def testCommodityComparisons(self):
+        x0 = amount()
+        x1 = amount("$-123")
+        x2 = amount("$123.00")
+        x3 = amount(internalAmount("$-123.4544"))
+        x4 = amount(internalAmount("$123.4544"))
+        x5 = amount("$-123.45")
+        x6 = amount("$123.45")
+
+        self.assertTrue(x0 > x1)
+        self.assertTrue(x0 < x2)
+        self.assertTrue(x0 > x3)
+        self.assertTrue(x0 < x4)
+        self.assertTrue(x0 > x5)
+        self.assertTrue(x0 < x6)
+
+        self.assertTrue(x1 > x3)
+        self.assertTrue(x3 <= x5)
+        self.assertTrue(x3 < x5)
+        self.assertTrue(x3 <= x5)
+        self.assertFalse(x3 == x5)
+        self.assertTrue(x3 < x1)
+        self.assertTrue(x3 < x4)
+
+        self.assertValid(x0)
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+        self.assertValid(x5)
+        self.assertValid(x6)
+
     def testIntegerAddition(self):
         x1 = amount(123)
         y1 = amount(456)
@@ -181,6 +359,58 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(y1)
         self.assertValid(x2)
 
+    def testCommodityAddition(self):
+        x0 = amount()
+        x1 = amount("$123.45")
+        x2 = amount(internalAmount("$123.456789"))
+        x3 = amount("DM 123.45")
+        x4 = amount("123.45 euro")
+        x5 = amount("123.45€")
+        x6 = amount("123.45")
+
+        self.assertEqual(amount("$246.90"), x1 + x1)
+        self.assertNotEqual(amount("$246.91"), x1 + x2)
+        self.assertEqual(internalAmount("$246.906789"), x1 + x2)
+
+        # Converting to string drops internal precision
+        self.assertEqual("$246.90", (x1 + x1).to_string())
+        self.assertEqual("$246.91", (x1 + x2).to_string())
+
+        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x0)
+        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x3)
+        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x4)
+        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x5)
+        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x6)
+        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, 123.45)
+        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, 123)
+
+        self.assertEqual(amount("DM 246.90"), x3 + x3)
+        self.assertEqual(amount("246.90 euro"), x4 + x4)
+        self.assertEqual(amount("246.90€"), x5 + x5)
+
+        self.assertEqual("DM 246.90", (x3 + x3).to_string())
+        self.assertEqual("246.90 euro", (x4 + x4).to_string())
+        self.assertEqual("246.90€", (x5 + x5).to_string())
+
+        x1 += amount("$456.45")
+        self.assertEqual(amount("$579.90"), x1)
+        x1 += amount("$456.45")
+        self.assertEqual(amount("$1036.35"), x1)
+        x1 += amount("$456")
+        self.assertEqual(amount("$1492.35"), x1)
+
+        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
+
+        self.assertEqual(internalAmount("$246913578246913578.246913578246913578"), x7 + x7)
+
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+        self.assertValid(x5)
+        self.assertValid(x6)
+        self.assertValid(x7)
+
     def testIntegerSubtraction(self):
         x1 = amount(123)
         y1 = amount(456)
@@ -231,6 +461,83 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(x2)
         self.assertValid(y2)
 
+    def testCommoditySubtraction(self):
+        x0 = amount()
+        x1 = amount("$123.45")
+        x2 = amount(internalAmount("$123.456789"))
+        x3 = amount("DM 123.45")
+        x4 = amount("123.45 euro")
+        x5 = amount("123.45€")
+        x6 = amount("123.45")
+
+        self.assertNotEqual(amount(), x1 - x1)
+        self.assertEqual(amount("$0"), x1 - x1)
+        self.assertEqual(amount("$23.45"), x1 - amount("$100.00"))
+        self.assertEqual(amount("$-23.45"), amount("$100.00") - x1)
+        self.assertNotEqual(amount("$-0.01"), x1 - x2)
+        self.assertEqual(internalAmount("$-0.006789"), x1 - x2)
+
+        # Converting to string drops internal precision.  If an amount is
+        # zero, it drops the commodity as well.
+        self.assertEqual("$0.00", (x1 - x1).to_string())
+        self.assertEqual("$-0.01", (x1 - x2).to_string())
+
+        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x0)
+        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x3)
+        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x4)
+        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x5)
+        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x6)
+        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, 123.45)
+        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, 123)
+
+        self.assertEqual(amount("DM 0.00"), x3 - x3)
+        self.assertEqual(amount("DM 23.45"), x3 - amount("DM 100.00"))
+        self.assertEqual(amount("DM -23.45"), amount("DM 100.00") - x3)
+        self.assertEqual(amount("0.00 euro"), x4 - x4)
+        self.assertEqual(amount("23.45 euro"), x4 - amount("100.00 euro"))
+        self.assertEqual(amount("-23.45 euro"), amount("100.00 euro") - x4)
+        self.assertEqual(amount("0.00€"), x5 - x5)
+        self.assertEqual(amount("23.45€"), x5 - amount("100.00€"))
+        self.assertEqual(amount("-23.45€"), amount("100.00€") - x5)
+
+        self.assertEqual("DM 0.00", (x3 - x3).to_string())
+        self.assertEqual("DM 23.45", (x3 - amount("DM 100.00")).to_string())
+        self.assertEqual("DM -23.45", (amount("DM 100.00") - x3).to_string())
+        self.assertEqual("0.00 euro", (x4 - x4).to_string())
+        self.assertEqual("23.45 euro", (x4 - amount("100.00 euro")).to_string())
+        self.assertEqual("-23.45 euro", (amount("100.00 euro") - x4).to_string())
+        self.assertEqual("0.00€", (x5 - x5).to_string())
+        self.assertEqual("23.45€", (x5 - amount("100.00€")).to_string())
+        self.assertEqual("-23.45€", (amount("100.00€") - x5).to_string())
+
+        x1 -= amount("$456.45")
+        self.assertEqual(amount("$-333.00"), x1)
+        x1 -= amount("$456.45")
+        self.assertEqual(amount("$-789.45"), x1)
+        x1 -= amount("$456")
+        self.assertEqual(amount("$-1245.45"), x1)
+
+        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
+        x8 = amount(internalAmount("$2354974984698.98459845984598"))
+
+        self.assertEqual(internalAmount("$123454434148472090.138858329277476789"), x7 - x8)
+        self.assertEqual("$123454434148472090.138858329277476789", (x7 - x8).to_string())
+        self.assertEqual("$123454434148472090.14",
+	      (amount("$1.00") * (x7 - x8)).to_string())
+        self.assertEqual(internalAmount("$-123454434148472090.138858329277476789"), x8 - x7)
+        self.assertEqual("$-123454434148472090.138858329277476789", (x8 - x7).to_string())
+        self.assertEqual("$-123454434148472090.14",
+	      (amount("$1.00") * (x8 - x7)).to_string())
+
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+        self.assertValid(x5)
+        self.assertValid(x6)
+        self.assertValid(x7)
+        self.assertValid(x8)
+
     def testIntegerMultiplication(self):
         x1 = amount(123)
         y1 = amount(456)
@@ -299,6 +606,58 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(y1)
         self.assertValid(x2)
 
+    def testCommodityMultiplication(self):
+        x1 = amount("$123.12")
+        y1 = amount("$456.45")
+        x2 = amount(internalAmount("$123.456789"))
+        x3 = amount("DM 123.45")
+        x4 = amount("123.45 euro")
+        x5 = amount("123.45€")
+
+        self.assertEqual(amount("$0.00"), x1 * 0)
+        self.assertEqual(amount("$0.00"), 0 * x1)
+        self.assertEqual(x1, x1 * 1)
+        self.assertEqual(x1, 1 * x1)
+        self.assertEqual(- x1, x1 * -1)
+        self.assertEqual(- x1, -1 * x1)
+        self.assertEqual(internalAmount("$56198.124"), x1 * y1)
+        self.assertEqual("$56198.12", (x1 * y1).to_string())
+        self.assertEqual(internalAmount("$56198.124"), y1 * x1)
+        self.assertEqual("$56198.12", (y1 * x1).to_string())
+
+        # Internal amounts retain their precision, even when being
+        # converted to strings
+        self.assertEqual(internalAmount("$15199.99986168"), x1 * x2)
+        self.assertEqual(internalAmount("$15199.99986168"), x2 * x1)
+        self.assertEqual("$15200.00", (x1 * x2).to_string())
+        self.assertEqual("$15199.99986168", (x2 * x1).to_string())
+
+        self.assertRaises(exceptions.ArithmeticError, operator.mul, x1, x3)
+        self.assertRaises(exceptions.ArithmeticError, operator.mul, x1, x4)
+        self.assertRaises(exceptions.ArithmeticError, operator.mul, x1, x5)
+
+        x1 *= amount("123.12")
+        self.assertEqual(internalAmount("$15158.5344"), x1)
+        self.assertEqual("$15158.53", x1.to_string())
+        x1 *= 123.12
+        self.assertEqual(internalAmount("$1866318.755328"), x1)
+        self.assertEqual("$1866318.76", x1.to_string())
+        x1 *= 123
+        self.assertEqual(internalAmount("$229557206.905344"), x1)
+        self.assertEqual("$229557206.91", x1.to_string())
+
+        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
+
+        self.assertEqual(internalAmount("$15241578780673678546105778311537878.046486820281054720515622620750190521"),
+	      x7 * x7)
+
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+        self.assertValid(x5)
+        self.assertValid(x7)
+
     def divideByZero(self, amt):
         return amt / 0
 
@@ -375,214 +734,86 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(x4)
         self.assertValid(y4)
 
-    def testIntegerConversion(self):
-        x1 = amount(123456)
-
-        self.assertTrue(x1)
-        self.assertEqual(123456, int(x1))
-        self.assertEqual(123456.0, float(x1))
-        self.assertEqual("123456", x1.to_string())
-        self.assertEqual("123456", x1.quantity_string())
-
-        self.assertValid(x1)
-
-    def testFractionalConversion(self):
-        x1 = amount(1234.56)
-
-        self.assertTrue(x1)
-        self.assertRaises(exceptions.ArithmeticError, amount.to_long, x1)
-        self.assertEqual(1234, x1.to_long(True))
-        self.assertEqual(1234.56, float(x1))
-        self.assertEqual("1234.56", x1.to_string())
-        self.assertEqual("1234.56", x1.quantity_string())
-
-        self.assertValid(x1)
-
-    def testFractionalRound(self):
-        x1 = amount("1234.567890")
-
-        self.assertEqual(amount("1234.56789"), x1.round(6))
-        self.assertEqual(amount("1234.56789"), x1.round(5))
-        self.assertEqual(amount("1234.5679"), x1.round(4))
-        self.assertEqual(amount("1234.568"), x1.round(3))
-        self.assertEqual(amount("1234.57"), x1.round(2))
-        self.assertEqual(amount("1234.6"), x1.round(1))
-        self.assertEqual(amount("1235"), x1.round(0))
-
-        x2 = amount("9876.543210")
-
-        self.assertEqual(amount("9876.543210"), x2.round(6))
-        self.assertEqual(amount("9876.54321"), x2.round(5))
-        self.assertEqual(amount("9876.5432"), x2.round(4))
-        self.assertEqual(amount("9876.543"), x2.round(3))
-        self.assertEqual(amount("9876.54"), x2.round(2))
-        self.assertEqual(amount("9876.5"), x2.round(1))
-        self.assertEqual(amount("9877"), x2.round(0))
-
-        x3 = amount("-1234.567890")
-
-        self.assertEqual(amount("-1234.56789"), x3.round(6))
-        self.assertEqual(amount("-1234.56789"), x3.round(5))
-        self.assertEqual(amount("-1234.5679"), x3.round(4))
-        self.assertEqual(amount("-1234.568"), x3.round(3))
-        self.assertEqual(amount("-1234.57"), x3.round(2))
-        self.assertEqual(amount("-1234.6"), x3.round(1))
-        self.assertEqual(amount("-1235"), x3.round(0))
-
-        x4 = amount("-9876.543210")
-
-        self.assertEqual(amount("-9876.543210"), x4.round(6))
-        self.assertEqual(amount("-9876.54321"), x4.round(5))
-        self.assertEqual(amount("-9876.5432"), x4.round(4))
-        self.assertEqual(amount("-9876.543"), x4.round(3))
-        self.assertEqual(amount("-9876.54"), x4.round(2))
-        self.assertEqual(amount("-9876.5"), x4.round(1))
-        self.assertEqual(amount("-9877"), x4.round(0))
-
-        self.assertValid(x1)
-        self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
-
-    def testTruth(self):
-        x0 = amount()
-        x1 = amount("1234")
-        x2 = amount("1234.56")
-
-        self.assertFalse(x0)
-        self.assertTrue(x1)
-        self.assertTrue(x2)
-
-        self.assertValid(x0)
-        self.assertValid(x1)
-        self.assertValid(x2)
-
-    def testForZero(self):
-        x0 = amount()
-        x1 = amount("0.000000000000000000001")
+    def testCommodityDivision(self):
+        x1 = amount("$123.12")
+        y1 = amount("$456.45")
+        x2 = amount(internalAmount("$123.456789"))
+        x3 = amount("DM 123.45")
+        x4 = amount("123.45 euro")
+        x5 = amount("123.45€")
 
-        self.assertFalse(x0)
-        self.assertTrue(x1)
-        self.assertTrue(x0.is_zero())
-        self.assertTrue(x0.is_realzero())
-        self.assertFalse(x1.is_zero())
-        self.assertFalse(x1.is_realzero())
+        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, 0)
+        self.assertEqual(amount("$0.00"), 0 / x1)
+        self.assertEqual(x1, x1 / 1)
+        self.assertEqual(internalAmount("$0.00812216"), 1 / x1)
+        self.assertEqual(- x1, x1 / -1)
+        self.assertEqual(internalAmount("$-0.00812216"), -1 / x1)
+        self.assertEqual(internalAmount("$0.26973382"), x1 / y1)
+        self.assertEqual("$0.27", (x1 / y1).to_string())
+        self.assertEqual(internalAmount("$3.70735867"), y1 / x1)
+        self.assertEqual("$3.71", (y1 / x1).to_string())
 
-        self.assertValid(x0)
-        self.assertValid(x1)
+        # Internal amounts retain their precision, even when being
+        # converted to strings
+        self.assertEqual(internalAmount("$0.99727201"), x1 / x2)
+        self.assertEqual(internalAmount("$1.00273545321637426901"), x2 / x1)
+        self.assertEqual("$1.00", (x1 / x2).to_string())
+        self.assertEqual("$1.00273545321637426901", (x2 / x1).to_string())
 
-    def testComparisons(self):
-        x0 = amount()
-        x1 = amount(-123)
-        x2 = amount(123)
-        x3 = amount(-123.45)
-        x4 = amount(123.45)
-        x5 = amount("-123.45")
-        x6 = amount("123.45")
+        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, x3)
+        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, x4)
+        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, x5)
 
-        self.assertTrue(x0 > x1)
-        self.assertTrue(x0 < x2)
-        self.assertTrue(x0 > x3)
-        self.assertTrue(x0 < x4)
-        self.assertTrue(x0 > x5)
-        self.assertTrue(x0 < x6)
+        x1 /= amount("123.12")
+        self.assertEqual(internalAmount("$1.00"), x1)
+        self.assertEqual("$1.00", x1.to_string())
+        x1 /= 123.12
+        self.assertEqual(internalAmount("$0.00812216"), x1)
+        self.assertEqual("$0.01", x1.to_string())
+        x1 /= 123
+        self.assertEqual(internalAmount("$0.00006603"), x1)
+        self.assertEqual("$0.00", x1.to_string())
 
-        self.assertTrue(x1 > x3)
-        self.assertTrue(x3 <= x5)
-        self.assertTrue(x3 >= x5)
-        self.assertTrue(x3 < x1)
-        self.assertTrue(x3 < x4)
+        x6 = amount(internalAmount("$237235987235987.98723987235978"))
+        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
 
-        self.assertTrue(x1 < 100)
-        self.assertTrue(x1 < 100.0)
-        self.assertTrue(100 > x1)
-        self.assertTrue(100.0 > x1)
+        self.assertEqual(amount("$1"), x7 / x7)
+        self.assertEqual(internalAmount("$0.0019216115121765559608381226612019501046413574469262"),
+	      x6 / x7)
+        self.assertEqual(internalAmount("$520.39654928343335571379527154924040947271699678158689736256"),
+	      x7 / x6)
 
-        self.assertValid(x0)
         self.assertValid(x1)
         self.assertValid(x2)
         self.assertValid(x3)
         self.assertValid(x4)
         self.assertValid(x5)
         self.assertValid(x6)
+        self.assertValid(x7)
 
-    def testSign(self):
+    def testNegation(self):
         x0 = amount()
-        x1 = amount("0.0000000000000000000000000000000000001")
-        x2 = amount("-0.0000000000000000000000000000000000001")
-        x3 = amount("1")
-        x4 = amount("-1")
-
-        self.assertEqual(x0.sign(), 0)
-        self.assertTrue(x1.sign() > 0)
-        self.assertTrue(x2.sign() < 0)
-        self.assertTrue(x3.sign() > 0)
-        self.assertTrue(x4.sign() < 0)
+        x1 = amount(-123456)
+        x3 = amount(-123.456)
+        x5 = amount("-123456")
+        x6 = amount("-123.456")
+        x9 = amount(- x3)
 
-        self.assertValid(x0)
-        self.assertValid(x1)
-        self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
+        self.assertEqual(amount(0), x0)
+        self.assertEqual(x5, x1)
+        self.assertEqual(x6, x3)
+        self.assertEqual(- x6, x9)
+        self.assertEqual(x3.negate(), x9)
 
-    def testAbs(self):
-        x0 = amount()
-        x1 = amount(-1234)
-        x2 = amount(1234)
+        x10 = amount(x9.negate())
 
-        self.assertEqual(amount(), abs(x0))
-        self.assertEqual(amount(1234), abs(x1))
-        self.assertEqual(amount(1234), abs(x2))
+        self.assertEqual(x3, x10)
 
         self.assertValid(x0)
         self.assertValid(x1)
-        self.assertValid(x2)
-
-    def testPrinting(self):
-        pass
-
-    def testCommodityConstructors(self):
-        x1  = amount("$123.45")
-        x2  = amount("-$123.45")
-        x3  = amount("$-123.45")
-        x4  = amount("DM 123.45")
-        x5  = amount("-DM 123.45")
-        x6  = amount("DM -123.45")
-        x7  = amount("123.45 euro")
-        x8  = amount("-123.45 euro")
-        x9  = amount("123.45€")
-        x10 = amount("-123.45€")
-
-        self.assertEqual(amount("$123.45"), x1)
-        self.assertEqual(amount("-$123.45"), x2)
-        self.assertEqual(amount("$-123.45"), x3)
-        self.assertEqual(amount("DM 123.45"), x4)
-        self.assertEqual(amount("-DM 123.45"), x5)
-        self.assertEqual(amount("DM -123.45"), x6)
-        self.assertEqual(amount("123.45 euro"), x7)
-        self.assertEqual(amount("-123.45 euro"), x8)
-        self.assertEqual(amount("123.45€"), x9)
-        self.assertEqual(amount("-123.45€"), x10)
-
-        self.assertEqual("$123.45", x1.to_string())
-        self.assertEqual("$-123.45", x2.to_string())
-        self.assertEqual("$-123.45", x3.to_string())
-        self.assertEqual("DM 123.45", x4.to_string())
-        self.assertEqual("DM -123.45", x5.to_string())
-        self.assertEqual("DM -123.45", x6.to_string())
-        self.assertEqual("123.45 euro", x7.to_string())
-        self.assertEqual("-123.45 euro", x8.to_string())
-        self.assertEqual("123.45€", x9.to_string())
-        self.assertEqual("-123.45€", x10.to_string())
-
-        self.assertValid(x1)
-        self.assertValid(x2)
         self.assertValid(x3)
-        self.assertValid(x4)
         self.assertValid(x5)
         self.assertValid(x6)
-        self.assertValid(x7)
-        self.assertValid(x8)
         self.assertValid(x9)
         self.assertValid(x10)
 
@@ -639,343 +870,84 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(x9)
         self.assertValid(x10)
 
-    def testCommodityAssignment(self):
-        x1 = amount("$123.45")
-        x2 = amount("-$123.45")
-        x3 = amount("$-123.45")
-        x4 = amount("DM 123.45")
-        x5 = amount("-DM 123.45")
-        x6 = amount("DM -123.45")
-        x7 = amount("123.45 euro")
-        x8 = amount("-123.45 euro")
-        x9 = amount("123.45€")
-        x10 = amount("-123.45€")
-
-        self.assertEqual(amount("$123.45"), x1)
-        self.assertEqual(amount("-$123.45"), x2)
-        self.assertEqual(amount("$-123.45"), x3)
-        self.assertEqual(amount("DM 123.45"), x4)
-        self.assertEqual(amount("-DM 123.45"), x5)
-        self.assertEqual(amount("DM -123.45"), x6)
-        self.assertEqual(amount("123.45 euro"), x7)
-        self.assertEqual(amount("-123.45 euro"), x8)
-        self.assertEqual(amount("123.45€"), x9)
-        self.assertEqual(amount("-123.45€"), x10)
-
-        self.assertEqual("$123.45", x1.to_string())
-        self.assertEqual("$-123.45", x2.to_string())
-        self.assertEqual("$-123.45", x3.to_string())
-        self.assertEqual("DM 123.45", x4.to_string())
-        self.assertEqual("DM -123.45", x5.to_string())
-        self.assertEqual("DM -123.45", x6.to_string())
-        self.assertEqual("123.45 euro", x7.to_string())
-        self.assertEqual("-123.45 euro", x8.to_string())
-        self.assertEqual("123.45€", x9.to_string())
-        self.assertEqual("-123.45€", x10.to_string())
-
-        self.assertValid(x1)
-        self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
-        self.assertValid(x5)
-        self.assertValid(x6)
-        self.assertValid(x7)
-        self.assertValid(x8)
-        self.assertValid(x9)
-        self.assertValid(x10)
-
-    def testCommodityEquality(self):
+    def testAbs(self):
         x0 = amount()
-        x1 = amount("$123.45")
-        x2 = amount("-$123.45")
-        x3 = amount("$-123.45")
-        x4 = amount("DM 123.45")
-        x5 = amount("-DM 123.45")
-        x6 = amount("DM -123.45")
-        x7 = amount("123.45 euro")
-        x8 = amount("-123.45 euro")
-        x9 = amount("123.45€")
-        x10 = amount("-123.45€")
-
-        self.assertTrue(x0.is_null())
-        self.assertTrue(x0.is_zero())
-        self.assertTrue(x0.is_realzero())
-        self.assertTrue(x0.sign() == 0)
-        self.assertTrue(x0.compare(x1) < 0)
-        self.assertTrue(x0.compare(x2) > 0)
-        self.assertTrue(x0.compare(x0) == 0)
+        x1 = amount(-1234)
+        x2 = amount(1234)
 
-        self.assertTrue(x1 != x2)
-        self.assertTrue(x1 != x4)
-        self.assertTrue(x1 != x7)
-        self.assertTrue(x1 != x9)
-        self.assertTrue(x2 == x3)
-        self.assertTrue(x4 != x5)
-        self.assertTrue(x5 == x6)
-        self.assertTrue(x7 == - x8)
-        self.assertTrue(x9 == - x10)
+        self.assertEqual(amount(), abs(x0))
+        self.assertEqual(amount(1234), abs(x1))
+        self.assertEqual(amount(1234), abs(x2))
 
         self.assertValid(x0)
         self.assertValid(x1)
         self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
-        self.assertValid(x5)
-        self.assertValid(x6)
-        self.assertValid(x7)
-        self.assertValid(x8)
-        self.assertValid(x9)
-        self.assertValid(x10)
-
-    def testCommodityAddition(self):
-        x0 = amount()
-        x1 = amount("$123.45")
-        x2 = amount(internalAmount("$123.456789"))
-        x3 = amount("DM 123.45")
-        x4 = amount("123.45 euro")
-        x5 = amount("123.45€")
-        x6 = amount("123.45")
-
-        self.assertEqual(amount("$246.90"), x1 + x1)
-        self.assertNotEqual(amount("$246.91"), x1 + x2)
-        self.assertEqual(internalAmount("$246.906789"), x1 + x2)
-
-        # Converting to string drops internal precision
-        self.assertEqual("$246.90", (x1 + x1).to_string())
-        self.assertEqual("$246.91", (x1 + x2).to_string())
 
-        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x0)
-        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x3)
-        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x4)
-        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x5)
-        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, x6)
-        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, 123.45)
-        self.assertRaises(exceptions.ArithmeticError, operator.add, x1, 123)
-
-        self.assertEqual(amount("DM 246.90"), x3 + x3)
-        self.assertEqual(amount("246.90 euro"), x4 + x4)
-        self.assertEqual(amount("246.90€"), x5 + x5)
-
-        self.assertEqual("DM 246.90", (x3 + x3).to_string())
-        self.assertEqual("246.90 euro", (x4 + x4).to_string())
-        self.assertEqual("246.90€", (x5 + x5).to_string())
-
-        x1 += amount("$456.45")
-        self.assertEqual(amount("$579.90"), x1)
-        x1 += amount("$456.45")
-        self.assertEqual(amount("$1036.35"), x1)
-        x1 += amount("$456")
-        self.assertEqual(amount("$1492.35"), x1)
-
-        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
-
-        self.assertEqual(internalAmount("$246913578246913578.246913578246913578"), x7 + x7)
-
-        self.assertValid(x1)
-        self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
-        self.assertValid(x5)
-        self.assertValid(x6)
-        self.assertValid(x7)
-
-    def testCommoditySubtraction(self):
+    def testCommodityAbs(self):
         x0 = amount()
-        x1 = amount("$123.45")
-        x2 = amount(internalAmount("$123.456789"))
-        x3 = amount("DM 123.45")
-        x4 = amount("123.45 euro")
-        x5 = amount("123.45€")
-        x6 = amount("123.45")
-
-        self.assertNotEqual(amount(), x1 - x1)
-        self.assertEqual(amount("$0"), x1 - x1)
-        self.assertEqual(amount("$23.45"), x1 - amount("$100.00"))
-        self.assertEqual(amount("$-23.45"), amount("$100.00") - x1)
-        self.assertNotEqual(amount("$-0.01"), x1 - x2)
-        self.assertEqual(internalAmount("$-0.006789"), x1 - x2)
-
-        # Converting to string drops internal precision.  If an amount is
-        # zero, it drops the commodity as well.
-        self.assertEqual("$0.00", (x1 - x1).to_string())
-        self.assertEqual("$-0.01", (x1 - x2).to_string())
-
-        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x0)
-        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x3)
-        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x4)
-        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x5)
-        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, x6)
-        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, 123.45)
-        self.assertRaises(exceptions.ArithmeticError, operator.sub, x1, 123)
-
-        self.assertEqual(amount("DM 0.00"), x3 - x3)
-        self.assertEqual(amount("DM 23.45"), x3 - amount("DM 100.00"))
-        self.assertEqual(amount("DM -23.45"), amount("DM 100.00") - x3)
-        self.assertEqual(amount("0.00 euro"), x4 - x4)
-        self.assertEqual(amount("23.45 euro"), x4 - amount("100.00 euro"))
-        self.assertEqual(amount("-23.45 euro"), amount("100.00 euro") - x4)
-        self.assertEqual(amount("0.00€"), x5 - x5)
-        self.assertEqual(amount("23.45€"), x5 - amount("100.00€"))
-        self.assertEqual(amount("-23.45€"), amount("100.00€") - x5)
-
-        self.assertEqual("DM 0.00", (x3 - x3).to_string())
-        self.assertEqual("DM 23.45", (x3 - amount("DM 100.00")).to_string())
-        self.assertEqual("DM -23.45", (amount("DM 100.00") - x3).to_string())
-        self.assertEqual("0.00 euro", (x4 - x4).to_string())
-        self.assertEqual("23.45 euro", (x4 - amount("100.00 euro")).to_string())
-        self.assertEqual("-23.45 euro", (amount("100.00 euro") - x4).to_string())
-        self.assertEqual("0.00€", (x5 - x5).to_string())
-        self.assertEqual("23.45€", (x5 - amount("100.00€")).to_string())
-        self.assertEqual("-23.45€", (amount("100.00€") - x5).to_string())
-
-        x1 -= amount("$456.45")
-        self.assertEqual(amount("$-333.00"), x1)
-        x1 -= amount("$456.45")
-        self.assertEqual(amount("$-789.45"), x1)
-        x1 -= amount("$456")
-        self.assertEqual(amount("$-1245.45"), x1)
-
-        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
-        x8 = amount(internalAmount("$2354974984698.98459845984598"))
+        x1 = amount("$-1234.56")
+        x2 = amount("$1234.56")
 
-        self.assertEqual(internalAmount("$123454434148472090.138858329277476789"), x7 - x8)
-        self.assertEqual("$123454434148472090.138858329277476789", (x7 - x8).to_string())
-        self.assertEqual("$123454434148472090.14",
-	      (amount("$1.00") * (x7 - x8)).to_string())
-        self.assertEqual(internalAmount("$-123454434148472090.138858329277476789"), x8 - x7)
-        self.assertEqual("$-123454434148472090.138858329277476789", (x8 - x7).to_string())
-        self.assertEqual("$-123454434148472090.14",
-	      (amount("$1.00") * (x8 - x7)).to_string())
+        self.assertEqual(amount(), abs(x0))
+        self.assertEqual(amount("$1234.56"), abs(x1))
+        self.assertEqual(amount("$1234.56"), abs(x2))
 
+        self.assertValid(x0)
         self.assertValid(x1)
         self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
-        self.assertValid(x5)
-        self.assertValid(x6)
-        self.assertValid(x7)
-        self.assertValid(x8)
-
-    def testCommodityMultiplication(self):
-        x1 = amount("$123.12")
-        y1 = amount("$456.45")
-        x2 = amount(internalAmount("$123.456789"))
-        x3 = amount("DM 123.45")
-        x4 = amount("123.45 euro")
-        x5 = amount("123.45€")
-
-        self.assertEqual(amount("$0.00"), x1 * 0)
-        self.assertEqual(amount("$0.00"), 0 * x1)
-        self.assertEqual(x1, x1 * 1)
-        self.assertEqual(x1, 1 * x1)
-        self.assertEqual(- x1, x1 * -1)
-        self.assertEqual(- x1, -1 * x1)
-        self.assertEqual(internalAmount("$56198.124"), x1 * y1)
-        self.assertEqual("$56198.12", (x1 * y1).to_string())
-        self.assertEqual(internalAmount("$56198.124"), y1 * x1)
-        self.assertEqual("$56198.12", (y1 * x1).to_string())
 
-        # Internal amounts retain their precision, even when being
-        # converted to strings
-        self.assertEqual(internalAmount("$15199.99986168"), x1 * x2)
-        self.assertEqual(internalAmount("$15199.99986168"), x2 * x1)
-        self.assertEqual("$15200.00", (x1 * x2).to_string())
-        self.assertEqual("$15199.99986168", (x2 * x1).to_string())
-
-        self.assertRaises(exceptions.ArithmeticError, operator.mul, x1, x3)
-        self.assertRaises(exceptions.ArithmeticError, operator.mul, x1, x4)
-        self.assertRaises(exceptions.ArithmeticError, operator.mul, x1, x5)
-
-        x1 *= amount("123.12")
-        self.assertEqual(internalAmount("$15158.5344"), x1)
-        self.assertEqual("$15158.53", x1.to_string())
-        x1 *= 123.12
-        self.assertEqual(internalAmount("$1866318.755328"), x1)
-        self.assertEqual("$1866318.76", x1.to_string())
-        x1 *= 123
-        self.assertEqual(internalAmount("$229557206.905344"), x1)
-        self.assertEqual("$229557206.91", x1.to_string())
-
-        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
+    def testFractionalRound(self):
+        x1 = amount("1234.567890")
 
-        self.assertEqual(internalAmount("$15241578780673678546105778311537878.046486820281054720515622620750190521"),
-	      x7 * x7)
+        self.assertEqual(amount("1234.56789"), x1.round(6))
+        self.assertEqual(amount("1234.56789"), x1.round(5))
+        self.assertEqual(amount("1234.5679"), x1.round(4))
+        self.assertEqual(amount("1234.568"), x1.round(3))
+        self.assertEqual(amount("1234.57"), x1.round(2))
+        self.assertEqual(amount("1234.6"), x1.round(1))
+        self.assertEqual(amount("1235"), x1.round(0))
 
-        self.assertValid(x1)
-        self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
-        self.assertValid(x5)
-        self.assertValid(x7)
+        x2 = amount("9876.543210")
 
-    def testCommodityDivision(self):
-        x1 = amount("$123.12")
-        y1 = amount("$456.45")
-        x2 = amount(internalAmount("$123.456789"))
-        x3 = amount("DM 123.45")
-        x4 = amount("123.45 euro")
-        x5 = amount("123.45€")
+        self.assertEqual(amount("9876.543210"), x2.round(6))
+        self.assertEqual(amount("9876.54321"), x2.round(5))
+        self.assertEqual(amount("9876.5432"), x2.round(4))
+        self.assertEqual(amount("9876.543"), x2.round(3))
+        self.assertEqual(amount("9876.54"), x2.round(2))
+        self.assertEqual(amount("9876.5"), x2.round(1))
+        self.assertEqual(amount("9877"), x2.round(0))
 
-        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, 0)
-        self.assertEqual(amount("$0.00"), 0 / x1)
-        self.assertEqual(x1, x1 / 1)
-        self.assertEqual(internalAmount("$0.00812216"), 1 / x1)
-        self.assertEqual(- x1, x1 / -1)
-        self.assertEqual(internalAmount("$-0.00812216"), -1 / x1)
-        self.assertEqual(internalAmount("$0.26973382"), x1 / y1)
-        self.assertEqual("$0.27", (x1 / y1).to_string())
-        self.assertEqual(internalAmount("$3.70735867"), y1 / x1)
-        self.assertEqual("$3.71", (y1 / x1).to_string())
+        x3 = amount("-1234.567890")
 
-        # Internal amounts retain their precision, even when being
-        # converted to strings
-        self.assertEqual(internalAmount("$0.99727201"), x1 / x2)
-        self.assertEqual(internalAmount("$1.00273545321637426901"), x2 / x1)
-        self.assertEqual("$1.00", (x1 / x2).to_string())
-        self.assertEqual("$1.00273545321637426901", (x2 / x1).to_string())
+        self.assertEqual(amount("-1234.56789"), x3.round(6))
+        self.assertEqual(amount("-1234.56789"), x3.round(5))
+        self.assertEqual(amount("-1234.5679"), x3.round(4))
+        self.assertEqual(amount("-1234.568"), x3.round(3))
+        self.assertEqual(amount("-1234.57"), x3.round(2))
+        self.assertEqual(amount("-1234.6"), x3.round(1))
+        self.assertEqual(amount("-1235"), x3.round(0))
 
-        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, x3)
-        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, x4)
-        self.assertRaises(exceptions.ArithmeticError, operator.div, x1, x5)
+        x4 = amount("-9876.543210")
 
-        x1 /= amount("123.12")
-        self.assertEqual(internalAmount("$1.00"), x1)
-        self.assertEqual("$1.00", x1.to_string())
-        x1 /= 123.12
-        self.assertEqual(internalAmount("$0.00812216"), x1)
-        self.assertEqual("$0.01", x1.to_string())
-        x1 /= 123
-        self.assertEqual(internalAmount("$0.00006603"), x1)
-        self.assertEqual("$0.00", x1.to_string())
+        self.assertEqual(amount("-9876.543210"), x4.round(6))
+        self.assertEqual(amount("-9876.54321"), x4.round(5))
+        self.assertEqual(amount("-9876.5432"), x4.round(4))
+        self.assertEqual(amount("-9876.543"), x4.round(3))
+        self.assertEqual(amount("-9876.54"), x4.round(2))
+        self.assertEqual(amount("-9876.5"), x4.round(1))
+        self.assertEqual(amount("-9877"), x4.round(0))
 
-        x6 = amount(internalAmount("$237235987235987.98723987235978"))
-        x7 = amount(internalAmount("$123456789123456789.123456789123456789"))
+        x5 = amount("0.0000000000000000000000000000000000001")
 
-        self.assertEqual(amount("$1"), x7 / x7)
-        self.assertEqual(internalAmount("$0.0019216115121765559608381226612019501046413574469262"),
-	      x6 / x7)
-        self.assertEqual(internalAmount("$520.39654928343335571379527154924040947271699678158689736256"),
-	      x7 / x6)
+        self.assertEqual(amount("0.0000000000000000000000000000000000001"),
+                         x5.round(37))
+        self.assertEqual(amount(), x5.round(36))
 
         self.assertValid(x1)
         self.assertValid(x2)
         self.assertValid(x3)
         self.assertValid(x4)
         self.assertValid(x5)
-        self.assertValid(x6)
-        self.assertValid(x7)
-
-    def testCommodityConversion(self):
-        x1 = amount("$1234.56")
-
-        self.assertEqual(True, bool(x1))
-        self.assertRaises(exceptions.ArithmeticError, amount.to_long, x1)
-        self.assertEqual(1234, x1.to_long(True))
-        self.assertEqual(1234.56, float(x1))
-        self.assertEqual("$1234.56", x1.to_string())
-        self.assertEqual("1234.56", x1.quantity_string())
-
-        self.assertValid(x1)
 
     def testCommodityRound(self):
         x1 = amount(internalAmount("$1234.567890"))
@@ -1018,10 +990,20 @@ class AmountTestCase(unittest.TestCase):
         self.assertEqual(amount("$-9876.5"), x4.round(1))
         self.assertEqual(amount("$-9877"), x4.round(0))
 
+        x5 = amount("$123.45")
+
+        x5 *= 100.12
+
+        self.assertEqual(internalAmount("$12359.814"), x5)
+        self.assertEqual("$12359.81", x5.to_string())
+        self.assertEqual("$12359.814", x5.to_fullstring())
+        self.assertEqual("$12359.814", x5.unround().to_string())
+
         self.assertValid(x1)
         self.assertValid(x2)
         self.assertValid(x3)
         self.assertValid(x4)
+        self.assertValid(x5)
 
     def testCommodityDisplayRound(self):
         x1 = amount("$0.85")
@@ -1043,6 +1025,75 @@ class AmountTestCase(unittest.TestCase):
         self.assertEqual(internalAmount("$1.1305"), x1)
         self.assertEqual("$1.13", x1.to_string())
 
+    def testReduction(self):
+        x1  = amount("60s")
+        x2  = amount("600s")
+        x3  = amount("6000s")
+        x4  = amount("360000s")
+        x5  = amount("10m")		# 600s
+        x6  = amount("100m")		# 6000s
+        x7  = amount("1000m")           # 60000s
+        x8  = amount("10000m")          # 600000s
+        x9  = amount("10h")		# 36000s
+        x10 = amount("100h")		# 360000s
+        x11 = amount("1000h")           # 3600000s
+        x12 = amount("10000h")          # 36000000s
+
+        self.assertEqual(x2, x5)
+        self.assertEqual(x3, x6)
+        self.assertEqual(x4, x10)
+
+    def testSign(self):
+        x0 = amount()
+        x1 = amount("0.0000000000000000000000000000000000001")
+        x2 = amount("-0.0000000000000000000000000000000000001")
+        x3 = amount("1")
+        x4 = amount("-1")
+
+        self.assertEqual(x0.sign(), 0)
+        self.assertTrue(x1.sign() > 0)
+        self.assertTrue(x2.sign() < 0)
+        self.assertTrue(x3.sign() > 0)
+        self.assertTrue(x4.sign() < 0)
+
+        self.assertValid(x0)
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+
+    def testCommoditySign(self):
+        x0 = amount()
+        x1 = amount(internalAmount("$0.0000000000000000000000000000000000001"))
+        x2 = amount(internalAmount("$-0.0000000000000000000000000000000000001"))
+        x3 = amount("$1")
+        x4 = amount("$-1")
+
+        self.assertFalse(x0.sign())
+        self.assertTrue(x1.sign() != 0)
+        self.assertTrue(x2.sign() != 0)
+        self.assertTrue(x3.sign() > 0)
+        self.assertTrue(x4.sign() < 0)
+
+        self.assertValid(x0)
+        self.assertValid(x1)
+        self.assertValid(x2)
+        self.assertValid(x3)
+        self.assertValid(x4)
+
+    def testTruth(self):
+        x0 = amount()
+        x1 = amount("1234")
+        x2 = amount("1234.56")
+
+        self.assertFalse(x0)
+        self.assertTrue(x1)
+        self.assertTrue(x2)
+
+        self.assertValid(x0)
+        self.assertValid(x1)
+        self.assertValid(x2)
+
     def testCommodityTruth(self):
         x1 = amount("$1234")
         x2 = amount("$1234.56")
@@ -1060,6 +1111,20 @@ class AmountTestCase(unittest.TestCase):
         self.assertValid(x1)
         self.assertValid(x2)
 
+    def testForZero(self):
+        x0 = amount()
+        x1 = amount("0.000000000000000000001")
+
+        self.assertFalse(x0)
+        self.assertTrue(x1)
+        self.assertTrue(x0.is_zero())
+        self.assertTrue(x0.is_realzero())
+        self.assertFalse(x1.is_zero())
+        self.assertFalse(x1.is_realzero())
+
+        self.assertValid(x0)
+        self.assertValid(x1)
+
     def testCommodityForZero(self):
         x1 = amount(internalAmount("$0.000000000000000000001"))
 
@@ -1069,73 +1134,43 @@ class AmountTestCase(unittest.TestCase):
 
         self.assertValid(x1)
 
-    def testCommodityComparisons(self):
-        x0 = amount()
-        x1 = amount("$-123")
-        x2 = amount("$123.00")
-        x3 = amount(internalAmount("$-123.4544"))
-        x4 = amount(internalAmount("$123.4544"))
-        x5 = amount("$-123.45")
-        x6 = amount("$123.45")
-
-        self.assertTrue(x0 > x1)
-        self.assertTrue(x0 < x2)
-        self.assertTrue(x0 > x3)
-        self.assertTrue(x0 < x4)
-        self.assertTrue(x0 > x5)
-        self.assertTrue(x0 < x6)
+    def testIntegerConversion(self):
+        x1 = amount(123456)
 
-        self.assertTrue(x1 > x3)
-        self.assertTrue(x3 <= x5)
-        self.assertTrue(x3 < x5)
-        self.assertTrue(x3 <= x5)
-        self.assertFalse(x3 == x5)
-        self.assertTrue(x3 < x1)
-        self.assertTrue(x3 < x4)
+        self.assertEqual(123456, int(x1))
+        self.assertEqual(123456.0, float(x1))
+        self.assertEqual("123456", x1.to_string())
+        self.assertEqual("123456", x1.quantity_string())
 
-        self.assertValid(x0)
         self.assertValid(x1)
-        self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
-        self.assertValid(x5)
-        self.assertValid(x6)
 
-    def testCommoditySign(self):
-        x0 = amount()
-        x1 = amount(internalAmount("$0.0000000000000000000000000000000000001"))
-        x2 = amount(internalAmount("$-0.0000000000000000000000000000000000001"))
-        x3 = amount("$1")
-        x4 = amount("$-1")
+    def testFractionalConversion(self):
+        x1 = amount(1234.56)
 
-        self.assertFalse(x0.sign())
-        self.assertTrue(x1.sign() != 0)
-        self.assertTrue(x2.sign() != 0)
-        self.assertTrue(x3.sign() > 0)
-        self.assertTrue(x4.sign() < 0)
+        self.assertRaises(exceptions.ArithmeticError, amount.to_long, x1)
+        self.assertEqual(1234, x1.to_long(True))
+        self.assertEqual(1234.56, float(x1))
+        self.assertEqual("1234.56", x1.to_string())
+        self.assertEqual("1234.56", x1.quantity_string())
 
-        self.assertValid(x0)
         self.assertValid(x1)
-        self.assertValid(x2)
-        self.assertValid(x3)
-        self.assertValid(x4)
 
-    def testCommodityAbs(self):
-        x0 = amount()
-        x1 = amount("$-1234.56")
-        x2 = amount("$1234.56")
+    def testCommodityConversion(self):
+        x1 = amount("$1234.56")
 
-        self.assertEqual(amount(), abs(x0))
-        self.assertEqual(amount("$1234.56"), abs(x1))
-        self.assertEqual(amount("$1234.56"), abs(x2))
+        self.assertRaises(exceptions.ArithmeticError, amount.to_long, x1)
+        self.assertEqual(1234, x1.to_long(True))
+        self.assertEqual(1234.56, float(x1))
+        self.assertEqual("$1234.56", x1.to_string())
+        self.assertEqual("1234.56", x1.quantity_string())
 
-        self.assertValid(x0)
         self.assertValid(x1)
-        self.assertValid(x2)
 
-    def testCommodityPrinting(self):
+    def testPrinting(self):
         pass
 
+    def testCommodityPrinting(self):
+        pass
 
 def suite():
     return unittest.TestLoader().loadTestsFromTestCase(AmountTestCase)