diff options
Diffstat (limited to 'Lib/test/test_math.py')
| -rw-r--r-- | Lib/test/test_math.py | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Lib/test/test_math.py b/Lib/test/test_math.py index 913a60bf9e0..384ad5c828d 100644 --- a/Lib/test/test_math.py +++ b/Lib/test/test_math.py @@ -1214,6 +1214,12 @@ class MathTests(unittest.TestCase): self.assertEqual(math.ldexp(NINF, n), NINF) self.assertTrue(math.isnan(math.ldexp(NAN, n))) + @requires_IEEE_754 + def testLdexp_denormal(self): + # Denormal output incorrectly rounded (truncated) + # on some Windows. + self.assertEqual(math.ldexp(6993274598585239, -1126), 1e-323) + def testLog(self): self.assertRaises(TypeError, math.log) self.assertRaises(TypeError, math.log, 1, 2, 3) @@ -1967,6 +1973,28 @@ class MathTests(unittest.TestCase): self.assertFalse(math.isfinite(float("inf"))) self.assertFalse(math.isfinite(float("-inf"))) + def testIsnormal(self): + self.assertTrue(math.isnormal(1.25)) + self.assertTrue(math.isnormal(-1.0)) + self.assertFalse(math.isnormal(0.0)) + self.assertFalse(math.isnormal(-0.0)) + self.assertFalse(math.isnormal(INF)) + self.assertFalse(math.isnormal(NINF)) + self.assertFalse(math.isnormal(NAN)) + self.assertFalse(math.isnormal(FLOAT_MIN/2)) + self.assertFalse(math.isnormal(-FLOAT_MIN/2)) + + def testIssubnormal(self): + self.assertFalse(math.issubnormal(1.25)) + self.assertFalse(math.issubnormal(-1.0)) + self.assertFalse(math.issubnormal(0.0)) + self.assertFalse(math.issubnormal(-0.0)) + self.assertFalse(math.issubnormal(INF)) + self.assertFalse(math.issubnormal(NINF)) + self.assertFalse(math.issubnormal(NAN)) + self.assertTrue(math.issubnormal(FLOAT_MIN/2)) + self.assertTrue(math.issubnormal(-FLOAT_MIN/2)) + def testIsnan(self): self.assertTrue(math.isnan(float("nan"))) self.assertTrue(math.isnan(float("-nan"))) |