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Diffstat (limited to 'lib/python2.7/test/test_unary.py')
-rw-r--r-- | lib/python2.7/test/test_unary.py | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/lib/python2.7/test/test_unary.py b/lib/python2.7/test/test_unary.py new file mode 100644 index 0000000..598fca8 --- /dev/null +++ b/lib/python2.7/test/test_unary.py @@ -0,0 +1,59 @@ +"""Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2""" + +import unittest +from test.test_support import run_unittest, have_unicode + +class UnaryOpTestCase(unittest.TestCase): + + def test_negative(self): + self.assertTrue(-2 == 0 - 2) + self.assertTrue(-0 == 0) + self.assertTrue(--2 == 2) + self.assertTrue(-2L == 0 - 2L) + self.assertTrue(-2.0 == 0 - 2.0) + self.assertTrue(-2j == 0 - 2j) + + def test_positive(self): + self.assertTrue(+2 == 2) + self.assertTrue(+0 == 0) + self.assertTrue(++2 == 2) + self.assertTrue(+2L == 2L) + self.assertTrue(+2.0 == 2.0) + self.assertTrue(+2j == 2j) + + def test_invert(self): + self.assertTrue(-2 == 0 - 2) + self.assertTrue(-0 == 0) + self.assertTrue(--2 == 2) + self.assertTrue(-2L == 0 - 2L) + + def test_no_overflow(self): + nines = "9" * 32 + self.assertTrue(eval("+" + nines) == eval("+" + nines + "L")) + self.assertTrue(eval("-" + nines) == eval("-" + nines + "L")) + self.assertTrue(eval("~" + nines) == eval("~" + nines + "L")) + + def test_negation_of_exponentiation(self): + # Make sure '**' does the right thing; these form a + # regression test for SourceForge bug #456756. + self.assertEqual(-2 ** 3, -8) + self.assertEqual((-2) ** 3, -8) + self.assertEqual(-2 ** 4, -16) + self.assertEqual((-2) ** 4, 16) + + def test_bad_types(self): + for op in '+', '-', '~': + self.assertRaises(TypeError, eval, op + "'a'") + if have_unicode: + self.assertRaises(TypeError, eval, op + "u'a'") + + self.assertRaises(TypeError, eval, "~2j") + self.assertRaises(TypeError, eval, "~2.0") + + +def test_main(): + run_unittest(UnaryOpTestCase) + + +if __name__ == "__main__": + test_main() |