60 lines
1.8 KiB
Python
60 lines
1.8 KiB
Python
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"""Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2"""
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import unittest
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from test.test_support import run_unittest, have_unicode
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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.assertTrue(-0 == 0)
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self.assertTrue(--2 == 2)
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self.assertTrue(-2L == 0 - 2L)
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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.assertTrue(+2 == 2)
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self.assertTrue(+0 == 0)
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self.assertTrue(++2 == 2)
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self.assertTrue(+2L == 2L)
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self.assertTrue(+2.0 == 2.0)
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self.assertTrue(+2j == 2j)
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def test_invert(self):
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self.assertTrue(-2 == 0 - 2)
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self.assertTrue(-0 == 0)
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self.assertTrue(--2 == 2)
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self.assertTrue(-2L == 0 - 2L)
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def test_no_overflow(self):
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nines = "9" * 32
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self.assertTrue(eval("+" + nines) == eval("+" + nines + "L"))
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self.assertTrue(eval("-" + nines) == eval("-" + nines + "L"))
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self.assertTrue(eval("~" + nines) == eval("~" + nines + "L"))
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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 + "'a'")
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if have_unicode:
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self.assertRaises(TypeError, eval, op + "u'a'")
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self.assertRaises(TypeError, eval, "~2j")
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self.assertRaises(TypeError, eval, "~2.0")
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def test_main():
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run_unittest(UnaryOpTestCase)
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if __name__ == "__main__":
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test_main()
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