1 """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2""" 2 3 import unittest 4 from test.test_support import run_unittest, have_unicode 5 6 class UnaryOpTestCase(unittest.TestCase): 7 8 def test_negative(self): 9 self.assertTrue(-2 == 0 - 2) 10 self.assertTrue(-0 == 0) 11 self.assertTrue(--2 == 2) 12 self.assertTrue(-2L == 0 - 2L) 13 self.assertTrue(-2.0 == 0 - 2.0) 14 self.assertTrue(-2j == 0 - 2j) 15 16 def test_positive(self): 17 self.assertTrue(+2 == 2) 18 self.assertTrue(+0 == 0) 19 self.assertTrue(++2 == 2) 20 self.assertTrue(+2L == 2L) 21 self.assertTrue(+2.0 == 2.0) 22 self.assertTrue(+2j == 2j) 23 24 def test_invert(self): 25 self.assertTrue(-2 == 0 - 2) 26 self.assertTrue(-0 == 0) 27 self.assertTrue(--2 == 2) 28 self.assertTrue(-2L == 0 - 2L) 29 30 def test_no_overflow(self): 31 nines = "9" * 32 32 self.assertTrue(eval("+" + nines) == eval("+" + nines + "L")) 33 self.assertTrue(eval("-" + nines) == eval("-" + nines + "L")) 34 self.assertTrue(eval("~" + nines) == eval("~" + nines + "L")) 35 36 def test_negation_of_exponentiation(self): 37 # Make sure '**' does the right thing; these form a 38 # regression test for SourceForge bug #456756. 39 self.assertEqual(-2 ** 3, -8) 40 self.assertEqual((-2) ** 3, -8) 41 self.assertEqual(-2 ** 4, -16) 42 self.assertEqual((-2) ** 4, 16) 43 44 def test_bad_types(self): 45 for op in '+', '-', '~': 46 self.assertRaises(TypeError, eval, op + "'a'") 47 if have_unicode: 48 self.assertRaises(TypeError, eval, op + "u'a'") 49 50 self.assertRaises(TypeError, eval, "~2j") 51 self.assertRaises(TypeError, eval, "~2.0") 52 53 54 def test_main(): 55 run_unittest(UnaryOpTestCase) 56 57 58 if __name__ == "__main__": 59 test_main() 60
