ceil, floor, round, trunc: enhance tests of -0

[gnulib.git] / tests / test-truncf1.c

diff --git a/tests/test-truncf1.c b/tests/test-truncf1.c
index b5f48dd..6953c8b 100644 (file)
--- a/tests/test-truncf1.c
+++ b/tests/test-truncf1.c
@@ -33,7 +33,9 @@ main ()
 {
   /* Zero.  */
   ASSERT (truncf (0.0f) == 0.0f);
+  ASSERT (!signbit (truncf (0.0f)));
   ASSERT (truncf (minus_zerof) == 0.0f);
+  ASSERT (!!signbit (minus_zerof) == !!signbit (truncf (minus_zerof)));
   /* Positive numbers.  */
   ASSERT (truncf (0.3f) == 0.0f);
   ASSERT (truncf (0.7f) == 0.0f);