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Issue #9011: Tests for Python 3.2's treatment of negated imaginary literals.

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This commit is contained in:
Mark Dickinson 2010-06-30 11:13:36 +00:00
parent af0e1544bf
commit 50b79a80bd
4 changed files with 63 additions and 5 deletions
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17
Lib/test/test_complex.py
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@ -435,6 +435,23 @@ class ComplexTest(unittest.TestCase):
self.assertEquals(atan2(z1.imag, -1.), atan2(0., -1.))
self.assertEquals(atan2(z2.imag, -1.), atan2(-0., -1.))
@unittest.skipUnless(float.__getformat__("double").startswith("IEEE"),
"test requires IEEE 754 doubles")
def test_negated_imaginary_literal(self):
z0 = -0j
z1 = -7j
z2 = -1e1000j
# Note: In versions of Python < 3.2, a negated imaginary literal
# accidentally ended up with real part 0.0 instead of -0.0, thanks to a
# modification during CST -> AST translation (see issue #9011). That's
# fixed in Python 3.2.
self.assertFloatsAreIdentical(z0.real, -0.0)
self.assertFloatsAreIdentical(z0.imag, -0.0)
self.assertFloatsAreIdentical(z1.real, -0.0)
self.assertFloatsAreIdentical(z1.imag, -7.0)
self.assertFloatsAreIdentical(z2.real, -0.0)
self.assertFloatsAreIdentical(z2.imag, -INF)
@unittest.skipUnless(float.__getformat__("double").startswith("IEEE"),
"test requires IEEE 754 doubles")
def test_overflow(self):