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Diffstat (limited to 'Lib/test/test_math.py')
| -rw-r--r-- | Lib/test/test_math.py | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py index 2d15f3a..8449794 100644 --- a/Lib/test/test_math.py +++ b/Lib/test/test_math.py @@ -231,6 +231,29 @@ class MathTests(unittest.TestCase): self.ftest('tanh(0)', math.tanh(0), 0) self.ftest('tanh(1)+tanh(-1)', math.tanh(1)+math.tanh(-1), 0) + def testCopysign(self): + self.assertEqual(math.copysign(1, 42), 1.0) + self.assertEqual(math.copysign(0., 42), 0.0) + self.assertEqual(math.copysign(1., -42), -1.0) + self.assertEqual(math.copysign(3, 0.), 3.0) + self.assertEqual(math.copysign(4., -0.), -4.0) + + def testIsnan(self): + self.assert_(math.isnan(float("nan"))) + self.assert_(math.isnan(float("inf")* 0.)) + self.failIf(math.isnan(float("inf"))) + self.failIf(math.isnan(0.)) + self.failIf(math.isnan(1.)) + + def testIsinf(self): + self.assert_(math.isinf(float("inf"))) + self.assert_(math.isinf(float("-inf"))) + self.assert_(math.isinf(1E400)) + self.assert_(math.isinf(-1E400)) + self.failIf(math.isinf(float("nan"))) + self.failIf(math.isinf(0.)) + self.failIf(math.isinf(1.)) + # RED_FLAG 16-Oct-2000 Tim # While 2.0 is more consistent about exceptions than previous releases, it # still fails this part of the test on some platforms. For now, we only |