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-rw-r--r--test/lisp/calc/calc-tests.el28
1 files changed, 28 insertions, 0 deletions
diff --git a/test/lisp/calc/calc-tests.el b/test/lisp/calc/calc-tests.el
index 9e36d91ac3e..c8cb97a8bca 100644
--- a/test/lisp/calc/calc-tests.el
+++ b/test/lisp/calc/calc-tests.el
@@ -368,6 +368,34 @@ An existing calc stack is reused, otherwise a new one is created."
(vec 0 0 (var a var-a) 0)))
'(neg (var a var-a)))))
+(ert-deftest calc-gcd ()
+ (should (equal (calcFunc-gcd 3 4) 1))
+ (should (equal (calcFunc-gcd 12 15) 3))
+ (should (equal (calcFunc-gcd -12 15) 3))
+ (should (equal (calcFunc-gcd 12 -15) 3))
+ (should (equal (calcFunc-gcd -12 -15) 3))
+ (should (equal (calcFunc-gcd 0 5) 5))
+ (should (equal (calcFunc-gcd 5 0) 5))
+ (should (equal (calcFunc-gcd 0 -5) 5))
+ (should (equal (calcFunc-gcd -5 0) 5))
+ (should (equal (calcFunc-gcd 0 0) 0))
+ (should (equal (calcFunc-gcd 0 '(var x var-x))
+ '(calcFunc-abs (var x var-x))))
+ (should (equal (calcFunc-gcd '(var x var-x) 0)
+ '(calcFunc-abs (var x var-x)))))
+
+(ert-deftest calc-sum-gcd ()
+ ;; sum(gcd(0,n),n,-1,-1)
+ (should (equal (math-simplify '(calcFunc-sum (calcFunc-gcd 0 (var n var-n))
+ (var n var-n) -1 -1))
+ 1))
+ ;; sum(sum(gcd(n,k),k,-1,1),n,-1,1)
+ (should (equal (math-simplify
+ '(calcFunc-sum
+ (calcFunc-sum (calcFunc-gcd (var n var-n) (var k var-k))
+ (var k var-k) -1 1)
+ (var n var-n) -1 1))
+ 8)))
(provide 'calc-tests)
;;; calc-tests.el ends here