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51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
"""Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2"""
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import unittest
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class UnaryOpTestCase(unittest.TestCase):
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def test_negative(self):
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self.assertTrue(-2 == 0 - 2)
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self.assertEqual(-0, 0)
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self.assertEqual(--2, 2)
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self.assertTrue(-2.0 == 0 - 2.0)
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self.assertTrue(-2j == 0 - 2j)
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def test_positive(self):
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self.assertEqual(+2, 2)
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self.assertEqual(+0, 0)
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self.assertEqual(++2, 2)
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self.assertEqual(+2.0, 2.0)
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self.assertEqual(+2j, 2j)
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def test_invert(self):
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self.assertTrue(~2 == -(2+1))
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self.assertEqual(~0, -1)
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self.assertEqual(~~2, 2)
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def test_no_overflow(self):
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nines = "9" * 32
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self.assertTrue(eval("+" + nines) == 10**32-1)
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self.assertTrue(eval("-" + nines) == -(10**32-1))
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self.assertTrue(eval("~" + nines) == ~(10**32-1))
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def test_negation_of_exponentiation(self):
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# Make sure '**' does the right thing; these form a
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# regression test for SourceForge bug #456756.
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self.assertEqual(-2 ** 3, -8)
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self.assertEqual((-2) ** 3, -8)
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self.assertEqual(-2 ** 4, -16)
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self.assertEqual((-2) ** 4, 16)
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def test_bad_types(self):
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for op in '+', '-', '~':
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self.assertRaises(TypeError, eval, op + "b'a'")
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self.assertRaises(TypeError, eval, op + "'a'")
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self.assertRaises(TypeError, eval, "~2j")
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self.assertRaises(TypeError, eval, "~2.0")
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if __name__ == "__main__":
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unittest.main()
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