diff options
Diffstat (limited to 'Lib/test/test_complex.py')
| -rw-r--r-- | Lib/test/test_complex.py | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/Lib/test/test_complex.py b/Lib/test/test_complex.py index 6441208d80..f6c7cc30ac 100644 --- a/Lib/test/test_complex.py +++ b/Lib/test/test_complex.py @@ -110,12 +110,18 @@ class ComplexTest(unittest.TestCase): self.assertRaises(TypeError, complex.__floordiv__, 3+0j, 0+0j) def test_richcompare(self): - self.assertRaises(OverflowError, complex.__eq__, 1+1j, 1<<10000) + self.assertIs(complex.__eq__(1+1j, 1<<10000), False) self.assertIs(complex.__lt__(1+1j, None), NotImplemented) self.assertIs(complex.__eq__(1+1j, 1+1j), True) self.assertIs(complex.__eq__(1+1j, 2+2j), False) self.assertIs(complex.__ne__(1+1j, 1+1j), False) self.assertIs(complex.__ne__(1+1j, 2+2j), True) + for i in range(1, 100): + f = i / 100.0 + self.assertIs(complex.__eq__(f+0j, f), True) + self.assertIs(complex.__ne__(f+0j, f), False) + self.assertIs(complex.__eq__(complex(f, f), f), False) + self.assertIs(complex.__ne__(complex(f, f), f), True) self.assertIs(complex.__lt__(1+1j, 2+2j), NotImplemented) self.assertIs(complex.__le__(1+1j, 2+2j), NotImplemented) self.assertIs(complex.__gt__(1+1j, 2+2j), NotImplemented) @@ -129,6 +135,23 @@ class ComplexTest(unittest.TestCase): self.assertIs(operator.ne(1+1j, 1+1j), False) self.assertIs(operator.ne(1+1j, 2+2j), True) + def test_richcompare_boundaries(self): + def check(n, deltas, is_equal, imag = 0.0): + for delta in deltas: + i = n + delta + z = complex(i, imag) + self.assertIs(complex.__eq__(z, i), is_equal(delta)) + self.assertIs(complex.__ne__(z, i), not is_equal(delta)) + # For IEEE-754 doubles the following should hold: + # x in [2 ** (52 + i), 2 ** (53 + i + 1)] -> x mod 2 ** i == 0 + # where the interval is representable, of course. + for i in range(1, 10): + pow = 52 + i + mult = 2 ** i + check(2 ** pow, range(1, 101), lambda delta: delta % mult == 0) + check(2 ** pow, range(1, 101), lambda delta: False, float(i)) + check(2 ** 53, range(-100, 0), lambda delta: True) + def test_mod(self): # % is no longer supported on complex numbers self.assertRaises(TypeError, (1+1j).__mod__, 0+0j) |