diff options
Diffstat (limited to 'lib-python/2.7/test/test_complex.py')
| -rw-r--r-- | lib-python/2.7/test/test_complex.py | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib-python/2.7/test/test_complex.py b/lib-python/2.7/test/test_complex.py index c0383b27e6..02b292f4bb 100644 --- a/lib-python/2.7/test/test_complex.py +++ b/lib-python/2.7/test/test_complex.py @@ -8,6 +8,13 @@ INF = float("inf") NAN = float("nan") # These tests ensure that complex math does the right thing +# decorator for skipping tests on non-IEEE 754 platforms +have_getformat = hasattr(float, "__getformat__") +requires_IEEE_754 = unittest.skipUnless(have_getformat and + float.__getformat__("double").startswith("IEEE"), + "test requires IEEE 754 doubles") + + class ComplexTest(unittest.TestCase): def assertAlmostEqual(self, a, b): @@ -441,6 +448,28 @@ class ComplexTest(unittest.TestCase): b = 'y %s x' % op self.assertTrue(type(eval(a)) is type(eval(b)) is xcomplex) + @requires_IEEE_754 + def test_constructor_special_numbers(self): + class complex2(complex): + pass + for x in 0.0, -0.0, INF, -INF, NAN: + for y in 0.0, -0.0, INF, -INF, NAN: + z = complex(x, y) + self.assertFloatsAreIdentical(z.real, x) + self.assertFloatsAreIdentical(z.imag, y) + z = complex2(x, y) + self.assertIs(type(z), complex2) + self.assertFloatsAreIdentical(z.real, x) + self.assertFloatsAreIdentical(z.imag, y) + z = complex(complex2(x, y)) + self.assertIs(type(z), complex) + self.assertFloatsAreIdentical(z.real, x) + self.assertFloatsAreIdentical(z.imag, y) + z = complex2(complex(x, y)) + self.assertIs(type(z), complex2) + self.assertFloatsAreIdentical(z.real, x) + self.assertFloatsAreIdentical(z.imag, y) + def test_hash(self): for x in xrange(-30, 30): self.assertEqual(hash(x), hash(complex(x, 0))) |