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✏️ test_unary.py
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"""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()
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