From 4e9764e6a155aa403d69d38fa06f4a774140f63c Mon Sep 17 00:00:00 2001
From: Stefan Kangas <stefan@marxist.se>
Date: Wed, 20 Oct 2021 20:03:34 +0200
Subject: [PATCH] Add some tests for floatfns.c

* test/src/floatfns-tests.el (floatfns-tests-cos)
(floatfns-tests-sin, floatfns-tests-tan, floatfns-tests-isnan)
(floatfns-tests-exp, floatfns-tests-expt, floatfns-tests-log)
(floatfns-tests-sqrt, floatfns-tests-abs, floatfns-tests-logb)
(floatfns-tests-ceiling, floatfns-tests-floor)
(floatfns-tests-round, floatfns-tests-truncate)
(floatfns-tests-fceiling, floatfns-tests-ffloor)
(floatfns-tests-fround, floatfns-tests-ftruncate)
(divide-extreme-sign): New tests.
---
 test/src/floatfns-tests.el | 62 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/test/src/floatfns-tests.el b/test/src/floatfns-tests.el
index 47fa1941626..a066d2e15e2 100644
--- a/test/src/floatfns-tests.el
+++ b/test/src/floatfns-tests.el
@@ -21,6 +21,68 @@
 
 (require 'ert)
 
+(ert-deftest floatfns-tests-cos ()
+  (should (= (cos 0) 1.0))
+  (should (= (cos float-pi) -1.0)))
+
+(ert-deftest floatfns-tests-sin ()
+  (should (= (sin 0) 0.0)))
+
+(ert-deftest floatfns-tests-tan ()
+  (should (= (tan 0) 0.0)))
+
+(ert-deftest floatfns-tests-isnan ()
+  (should (isnan 0.0e+NaN))
+  (should (isnan -0.0e+NaN))
+  (should-error (isnan "foo") :type 'wrong-type-argument))
+
+(ert-deftest floatfns-tests-exp ()
+  (should (= (exp 0) 1.0)))
+
+(ert-deftest floatfns-tests-expt ()
+  (should (= (expt 2 8) 256)))
+
+(ert-deftest floatfns-tests-log ()
+  (should (= (log 1000 10) 3.0)))
+
+(ert-deftest floatfns-tests-sqrt ()
+  (should (= (sqrt 25) 5)))
+
+(ert-deftest floatfns-tests-abs ()
+  (should (= (abs 10) 10))
+  (should (= (abs -10) 10)))
+
+(ert-deftest floatfns-tests-logb ()
+  (should (= (logb 10000) 13)))
+
+(ert-deftest floatfns-tests-ceiling ()
+  (should (= (ceiling 0.5) 1)))
+
+(ert-deftest floatfns-tests-floor ()
+  (should (= (floor 1.5) 1)))
+
+(ert-deftest floatfns-tests-round ()
+  (should (= (round 1.49999999999) 1))
+  (should (= (round 1.50000000000) 2))
+  (should (= (round 1.50000000001) 2)))
+
+(ert-deftest floatfns-tests-truncate ()
+  (should (= (truncate float-pi) 3)))
+
+(ert-deftest floatfns-tests-fceiling ()
+  (should (= (fceiling 0.5) 1.0)))
+
+(ert-deftest floatfns-tests-ffloor ()
+  (should (= (ffloor 1.5) 1.0)))
+
+(ert-deftest floatfns-tests-fround ()
+  (should (= (fround 1.49999999999) 1.0))
+  (should (= (fround 1.50000000000) 2.0))
+  (should (= (fround 1.50000000001) 2.0)))
+
+(ert-deftest floatfns-tests-ftruncate ()
+  (should (= (ftruncate float-pi) 3.0)))
+
 (ert-deftest divide-extreme-sign ()
   (should (= (ceiling most-negative-fixnum -1.0) (- most-negative-fixnum)))
   (should (= (floor most-negative-fixnum -1.0) (- most-negative-fixnum)))
-- 
2.39.2