fix: Fix #543 by tracking an account's real balance

Without these changes, whether an account's balance is virtual
or real is not considered when asserting it's balance. This lead
to situations where the user must consider their virtual postings
when attemping to assert the real balance of the account. See
test/regress/543_a.test for that testcase, taken from the original
issue. This commit also includes other, fringe, situations that I
noticed while working on the fix. It essentially just adds a separate
attribute to the account class(?) that hold's the account's "real"
balance, which is only updated when the user attempts an assertion on a
real account. The virtual account's balance is updated the way it always
was.

4 files changed, 104 insertions, 0 deletions

diff --git a/test/regress/543_a.test b/test/regress/543_a.test
new file mode 100644
index 00000000..6359f0e2
--- /dev/null
+++ b/test/regress/543_a.test
@@ -0,0 +1,26 @@
+2018/01/01 * Opening Balance
+    Assets:Checking                             $100.00
+    Equity:Opening Balances
+
+2018/01/01 * Budget
+    [Assets:Checking]                           -$100.00
+    [Assets:Budget:Food:Groceries]              $20.00
+    [Assets:Budget:Food:Restaurants]            $80.00
+
+2018/01/02 * Assertion
+    [Assets:Checking]                           = $0.00
+
+2018/01/02 * Assertion
+    Assets:Checking                             = $100.00
+
+test bal Assets
+             $100.00  Assets:Budget:Food
+              $20.00    Groceries
+              $80.00    Restaurants
+--------------------
+             $100.00
+end test
+
+test bal Assets -R
+             $100.00  Assets:Checking
+end test
diff --git a/test/regress/543_b.test b/test/regress/543_b.test
new file mode 100644
index 00000000..1a022ae4
--- /dev/null
+++ b/test/regress/543_b.test
@@ -0,0 +1,22 @@
+2018/01/01 * Opening Balance
+    Assets:Checking                             $100.00
+    Equity:Opening Balances
+
+2018/01/01 * Budget
+    [Assets:Checking]                           -$100.00
+    [Assets:Budget:Food:Groceries]              $20.00
+    [Assets:Budget:Food:Restaurants]            $80.00
+
+2018/01/02 * Buy Groceries
+    [Assets:Budget:Food:Groceries]              -$20 = $0
+    [Assets:Checking]                           $20
+    Assets:Checking                             -$20 = $80
+    Expenses:Food:Groceries                     $20
+
+test bal Assets
+              $80.00  Assets:Budget:Food:Restaurants
+end test
+
+test bal Assets -R
+              $80.00  Assets:Checking
+end test
diff --git a/test/regress/543_c.test b/test/regress/543_c.test
new file mode 100644
index 00000000..0e51b119
--- /dev/null
+++ b/test/regress/543_c.test
@@ -0,0 +1,24 @@
+2018/01/01 * Opening Balance
+    Assets:Checking                             $100.00
+    Equity:Opening Balances
+
+2018/01/01 * Budget
+    [Assets:Checking]                           -$100.00
+    [Assets:Budget:Food:Groceries]              $20.00
+    [Assets:Budget:Food:Restaurants]            $80.00
+
+2018/01/02 * Budget Groceries
+    [Assets:Budget:Food:Groceries]              -$20 = $0
+    [Assets:Checking]                           $20
+
+2018/01/02 * Buy Groceries
+    Assets:Checking                             -$20 = $80
+    Expenses:Food:Groceries                     $20
+
+test bal Assets
+              $80.00  Assets:Budget:Food:Restaurants
+end test
+
+test bal Assets -R
+              $80.00  Assets:Checking
+end test
diff --git a/test/regress/543_d.test b/test/regress/543_d.test
new file mode 100644
index 00000000..3b4e825a
--- /dev/null
+++ b/test/regress/543_d.test
@@ -0,0 +1,32 @@
+2018/01/01 * Opening Balance
+    Assets:Checking                             $100.00
+    Equity:Opening Balances
+
+2018/01/01 * Budget
+    [Assets:Checking]                           = 0
+    [Assets:Budget:Food:Groceries]              $20.00
+    [Assets:Budget:Food:Restaurants]            $80.00
+
+2018/01/02 * Groceries
+    Assets:Checking                             = $80.00
+    Expenses:Groceries
+
+test bal
+              $80.00  Assets
+             $100.00    Budget:Food
+              $20.00      Groceries
+              $80.00      Restaurants
+             $-20.00    Checking
+            $-100.00  Equity:Opening Balances
+              $20.00  Expenses:Groceries
+--------------------
+                   0
+end test
+
+test bal -R
+              $80.00  Assets:Checking
+            $-100.00  Equity:Opening Balances
+              $20.00  Expenses:Groceries
+--------------------
+                   0
+end test