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-rw-r--r--test/src/floatfns-tests.el4
1 files changed, 3 insertions, 1 deletions
diff --git a/test/src/floatfns-tests.el b/test/src/floatfns-tests.el
index 62201a877d0..7f1d4691bf0 100644
--- a/test/src/floatfns-tests.el
+++ b/test/src/floatfns-tests.el
@@ -122,6 +122,8 @@
(ert-deftest big-round ()
(should (= (floor 54043195528445955 3)
- (floor 54043195528445955 3.0))))
+ (floor 54043195528445955 3.0)))
+ (should (= (floor 1.7976931348623157e+308 5e-324)
+ (ash (1- (ash 1 53)) 2045))))
(provide 'floatfns-tests)