| 1 | """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2"""
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| 2 |
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| 3 | import unittest
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| 4 | from test.test_support import run_unittest, have_unicode
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| 5 |
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| 6 | class UnaryOpTestCase(unittest.TestCase):
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| 7 |
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| 8 | def test_negative(self):
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| 9 | self.assertTrue(-2 == 0 - 2)
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| 10 | self.assertTrue(-0 == 0)
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| 11 | self.assertTrue(--2 == 2)
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| 12 | self.assertTrue(-2L == 0 - 2L)
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| 13 | self.assertTrue(-2.0 == 0 - 2.0)
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| 14 | self.assertTrue(-2j == 0 - 2j)
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| 15 |
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| 16 | def test_positive(self):
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| 17 | self.assertTrue(+2 == 2)
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| 18 | self.assertTrue(+0 == 0)
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| 19 | self.assertTrue(++2 == 2)
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| 20 | self.assertTrue(+2L == 2L)
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| 21 | self.assertTrue(+2.0 == 2.0)
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| 22 | self.assertTrue(+2j == 2j)
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| 23 |
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| 24 | def test_invert(self):
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| 25 | self.assertTrue(-2 == 0 - 2)
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| 26 | self.assertTrue(-0 == 0)
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| 27 | self.assertTrue(--2 == 2)
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| 28 | self.assertTrue(-2L == 0 - 2L)
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| 29 |
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| 30 | def test_no_overflow(self):
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| 31 | nines = "9" * 32
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| 32 | self.assertTrue(eval("+" + nines) == eval("+" + nines + "L"))
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| 33 | self.assertTrue(eval("-" + nines) == eval("-" + nines + "L"))
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| 34 | self.assertTrue(eval("~" + nines) == eval("~" + nines + "L"))
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| 35 |
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| 36 | def test_negation_of_exponentiation(self):
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| 37 | # Make sure '**' does the right thing; these form a
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| 38 | # regression test for SourceForge bug #456756.
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| 39 | self.assertEqual(-2 ** 3, -8)
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| 40 | self.assertEqual((-2) ** 3, -8)
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| 41 | self.assertEqual(-2 ** 4, -16)
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| 42 | self.assertEqual((-2) ** 4, 16)
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| 43 |
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| 44 | def test_bad_types(self):
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| 45 | for op in '+', '-', '~':
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| 46 | self.assertRaises(TypeError, eval, op + "'a'")
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| 47 | if have_unicode:
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| 48 | self.assertRaises(TypeError, eval, op + "u'a'")
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| 49 |
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| 50 | self.assertRaises(TypeError, eval, "~2j")
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| 51 | self.assertRaises(TypeError, eval, "~2.0")
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| 52 |
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| 53 |
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| 54 | def test_main():
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| 55 | run_unittest(UnaryOpTestCase)
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| 56 |
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| 57 |
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| 58 | if __name__ == "__main__":
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| 59 | test_main()
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