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58a7da9e12
* bpo-26680: Adds support for int.is_integer() for compatibility with float.is_integer(). The int.is_integer() method always returns True. * bpo-26680: Adds a test to ensure that False.is_integer() and True.is_integer() are always True. * bpo-26680: Adds Real.is_integer() with a trivial implementation using conversion to int. This default implementation is intended to reduce the workload for subclass implementers. It is not robust in the presence of infinities or NaNs and may have suboptimal performance for other types. * bpo-26680: Adds Rational.is_integer which returns True if the denominator is one. This implementation assumes the Rational is represented in it's lowest form, as required by the class docstring. * bpo-26680: Adds Integral.is_integer which always returns True. * bpo-26680: Adds tests for Fraction.is_integer called as an instance method. The tests for the Rational abstract base class use an unbound method to sidestep the inability to directly instantiate Rational. These tests check that everything works correct as an instance method. * bpo-26680: Updates documentation for Real.is_integer and built-ins int and float. The call x.is_integer() is now listed in the table of operations which apply to all numeric types except complex, with a reference to the full documentation for Real.is_integer(). Mention of is_integer() has been removed from the section 'Additional Methods on Float'. The documentation for Real.is_integer() describes its purpose, and mentions that it should be overridden for performance reasons, or to handle special values like NaN. * bpo-26680: Adds Decimal.is_integer to the Python and C implementations. The C implementation of Decimal already implements and uses mpd_isinteger internally, we just expose the existing function to Python. The Python implementation uses internal conversion to integer using to_integral_value(). In both cases, the corresponding context methods are also implemented. Tests and documentation are included. * bpo-26680: Updates the ACKS file. * bpo-26680: NEWS entries for int, the numeric ABCs and Decimal. Co-authored-by: Robert Smallshire <rob@sixty-north.com>
366 lines
12 KiB
Python
366 lines
12 KiB
Python
# Test properties of bool promised by PEP 285
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import unittest
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from test import support
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from test.support import os_helper
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import os
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class BoolTest(unittest.TestCase):
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def test_subclass(self):
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try:
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class C(bool):
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pass
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except TypeError:
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pass
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else:
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self.fail("bool should not be subclassable")
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self.assertRaises(TypeError, int.__new__, bool, 0)
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def test_repr(self):
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self.assertEqual(repr(False), 'False')
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self.assertEqual(repr(True), 'True')
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self.assertIs(eval(repr(False)), False)
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self.assertIs(eval(repr(True)), True)
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def test_str(self):
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self.assertEqual(str(False), 'False')
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self.assertEqual(str(True), 'True')
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def test_int(self):
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self.assertEqual(int(False), 0)
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self.assertIsNot(int(False), False)
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self.assertEqual(int(True), 1)
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self.assertIsNot(int(True), True)
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def test_float(self):
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self.assertEqual(float(False), 0.0)
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self.assertIsNot(float(False), False)
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self.assertEqual(float(True), 1.0)
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self.assertIsNot(float(True), True)
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def test_math(self):
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self.assertEqual(+False, 0)
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self.assertIsNot(+False, False)
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self.assertEqual(-False, 0)
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self.assertIsNot(-False, False)
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self.assertEqual(abs(False), 0)
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self.assertIsNot(abs(False), False)
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self.assertEqual(+True, 1)
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self.assertIsNot(+True, True)
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self.assertEqual(-True, -1)
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self.assertEqual(abs(True), 1)
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self.assertIsNot(abs(True), True)
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self.assertEqual(~False, -1)
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self.assertEqual(~True, -2)
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self.assertEqual(False+2, 2)
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self.assertEqual(True+2, 3)
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self.assertEqual(2+False, 2)
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self.assertEqual(2+True, 3)
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self.assertEqual(False+False, 0)
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self.assertIsNot(False+False, False)
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self.assertEqual(False+True, 1)
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self.assertIsNot(False+True, True)
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self.assertEqual(True+False, 1)
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self.assertIsNot(True+False, True)
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self.assertEqual(True+True, 2)
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self.assertEqual(True-True, 0)
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self.assertIsNot(True-True, False)
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self.assertEqual(False-False, 0)
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self.assertIsNot(False-False, False)
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self.assertEqual(True-False, 1)
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self.assertIsNot(True-False, True)
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self.assertEqual(False-True, -1)
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self.assertEqual(True*1, 1)
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self.assertEqual(False*1, 0)
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self.assertIsNot(False*1, False)
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self.assertEqual(True/1, 1)
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self.assertIsNot(True/1, True)
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self.assertEqual(False/1, 0)
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self.assertIsNot(False/1, False)
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self.assertEqual(True%1, 0)
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self.assertIsNot(True%1, False)
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self.assertEqual(True%2, 1)
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self.assertIsNot(True%2, True)
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self.assertEqual(False%1, 0)
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self.assertIsNot(False%1, False)
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for b in False, True:
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for i in 0, 1, 2:
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self.assertEqual(b**i, int(b)**i)
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self.assertIsNot(b**i, bool(int(b)**i))
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for a in False, True:
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for b in False, True:
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self.assertIs(a&b, bool(int(a)&int(b)))
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self.assertIs(a|b, bool(int(a)|int(b)))
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self.assertIs(a^b, bool(int(a)^int(b)))
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self.assertEqual(a&int(b), int(a)&int(b))
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self.assertIsNot(a&int(b), bool(int(a)&int(b)))
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self.assertEqual(a|int(b), int(a)|int(b))
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self.assertIsNot(a|int(b), bool(int(a)|int(b)))
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self.assertEqual(a^int(b), int(a)^int(b))
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self.assertIsNot(a^int(b), bool(int(a)^int(b)))
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self.assertEqual(int(a)&b, int(a)&int(b))
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self.assertIsNot(int(a)&b, bool(int(a)&int(b)))
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self.assertEqual(int(a)|b, int(a)|int(b))
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self.assertIsNot(int(a)|b, bool(int(a)|int(b)))
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self.assertEqual(int(a)^b, int(a)^int(b))
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self.assertIsNot(int(a)^b, bool(int(a)^int(b)))
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self.assertIs(1==1, True)
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self.assertIs(1==0, False)
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self.assertIs(0<1, True)
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self.assertIs(1<0, False)
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self.assertIs(0<=0, True)
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self.assertIs(1<=0, False)
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self.assertIs(1>0, True)
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self.assertIs(1>1, False)
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self.assertIs(1>=1, True)
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self.assertIs(0>=1, False)
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self.assertIs(0!=1, True)
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self.assertIs(0!=0, False)
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x = [1]
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self.assertIs(x is x, True)
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self.assertIs(x is not x, False)
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self.assertIs(1 in x, True)
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self.assertIs(0 in x, False)
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self.assertIs(1 not in x, False)
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self.assertIs(0 not in x, True)
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x = {1: 2}
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self.assertIs(x is x, True)
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self.assertIs(x is not x, False)
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self.assertIs(1 in x, True)
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self.assertIs(0 in x, False)
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self.assertIs(1 not in x, False)
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self.assertIs(0 not in x, True)
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self.assertIs(not True, False)
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self.assertIs(not False, True)
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def test_convert(self):
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self.assertRaises(TypeError, bool, 42, 42)
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self.assertIs(bool(10), True)
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self.assertIs(bool(1), True)
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self.assertIs(bool(-1), True)
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self.assertIs(bool(0), False)
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self.assertIs(bool("hello"), True)
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self.assertIs(bool(""), False)
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self.assertIs(bool(), False)
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def test_keyword_args(self):
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with self.assertRaisesRegex(TypeError, 'keyword argument'):
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bool(x=10)
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def test_format(self):
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self.assertEqual("%d" % False, "0")
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self.assertEqual("%d" % True, "1")
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self.assertEqual("%x" % False, "0")
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self.assertEqual("%x" % True, "1")
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def test_hasattr(self):
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self.assertIs(hasattr([], "append"), True)
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self.assertIs(hasattr([], "wobble"), False)
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def test_callable(self):
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self.assertIs(callable(len), True)
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self.assertIs(callable(1), False)
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def test_isinstance(self):
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self.assertIs(isinstance(True, bool), True)
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self.assertIs(isinstance(False, bool), True)
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self.assertIs(isinstance(True, int), True)
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self.assertIs(isinstance(False, int), True)
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self.assertIs(isinstance(1, bool), False)
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self.assertIs(isinstance(0, bool), False)
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def test_issubclass(self):
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self.assertIs(issubclass(bool, int), True)
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self.assertIs(issubclass(int, bool), False)
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def test_contains(self):
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self.assertIs(1 in {}, False)
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self.assertIs(1 in {1:1}, True)
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def test_string(self):
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self.assertIs("xyz".endswith("z"), True)
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self.assertIs("xyz".endswith("x"), False)
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self.assertIs("xyz0123".isalnum(), True)
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self.assertIs("@#$%".isalnum(), False)
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self.assertIs("xyz".isalpha(), True)
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self.assertIs("@#$%".isalpha(), False)
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self.assertIs("0123".isdigit(), True)
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self.assertIs("xyz".isdigit(), False)
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self.assertIs("xyz".islower(), True)
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self.assertIs("XYZ".islower(), False)
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self.assertIs("0123".isdecimal(), True)
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self.assertIs("xyz".isdecimal(), False)
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self.assertIs("0123".isnumeric(), True)
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self.assertIs("xyz".isnumeric(), False)
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self.assertIs(" ".isspace(), True)
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self.assertIs("\xa0".isspace(), True)
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self.assertIs("\u3000".isspace(), True)
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self.assertIs("XYZ".isspace(), False)
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self.assertIs("X".istitle(), True)
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self.assertIs("x".istitle(), False)
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self.assertIs("XYZ".isupper(), True)
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self.assertIs("xyz".isupper(), False)
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self.assertIs("xyz".startswith("x"), True)
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self.assertIs("xyz".startswith("z"), False)
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def test_boolean(self):
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self.assertEqual(True & 1, 1)
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self.assertNotIsInstance(True & 1, bool)
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self.assertIs(True & True, True)
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self.assertEqual(True | 1, 1)
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self.assertNotIsInstance(True | 1, bool)
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self.assertIs(True | True, True)
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self.assertEqual(True ^ 1, 0)
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self.assertNotIsInstance(True ^ 1, bool)
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self.assertIs(True ^ True, False)
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def test_fileclosed(self):
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try:
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with open(os_helper.TESTFN, "w") as f:
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self.assertIs(f.closed, False)
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self.assertIs(f.closed, True)
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finally:
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os.remove(os_helper.TESTFN)
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def test_types(self):
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# types are always true.
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for t in [bool, complex, dict, float, int, list, object,
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set, str, tuple, type]:
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self.assertIs(bool(t), True)
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def test_operator(self):
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import operator
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self.assertIs(operator.truth(0), False)
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self.assertIs(operator.truth(1), True)
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self.assertIs(operator.not_(1), False)
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self.assertIs(operator.not_(0), True)
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self.assertIs(operator.contains([], 1), False)
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self.assertIs(operator.contains([1], 1), True)
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self.assertIs(operator.lt(0, 0), False)
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self.assertIs(operator.lt(0, 1), True)
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self.assertIs(operator.is_(True, True), True)
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self.assertIs(operator.is_(True, False), False)
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self.assertIs(operator.is_not(True, True), False)
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self.assertIs(operator.is_not(True, False), True)
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def test_marshal(self):
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import marshal
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self.assertIs(marshal.loads(marshal.dumps(True)), True)
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self.assertIs(marshal.loads(marshal.dumps(False)), False)
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def test_pickle(self):
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import pickle
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for proto in range(pickle.HIGHEST_PROTOCOL + 1):
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self.assertIs(pickle.loads(pickle.dumps(True, proto)), True)
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self.assertIs(pickle.loads(pickle.dumps(False, proto)), False)
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def test_picklevalues(self):
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# Test for specific backwards-compatible pickle values
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import pickle
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self.assertEqual(pickle.dumps(True, protocol=0), b"I01\n.")
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self.assertEqual(pickle.dumps(False, protocol=0), b"I00\n.")
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self.assertEqual(pickle.dumps(True, protocol=1), b"I01\n.")
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self.assertEqual(pickle.dumps(False, protocol=1), b"I00\n.")
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self.assertEqual(pickle.dumps(True, protocol=2), b'\x80\x02\x88.')
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self.assertEqual(pickle.dumps(False, protocol=2), b'\x80\x02\x89.')
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def test_convert_to_bool(self):
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# Verify that TypeError occurs when bad things are returned
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# from __bool__(). This isn't really a bool test, but
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# it's related.
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check = lambda o: self.assertRaises(TypeError, bool, o)
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class Foo(object):
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def __bool__(self):
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return self
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check(Foo())
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class Bar(object):
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def __bool__(self):
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return "Yes"
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check(Bar())
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class Baz(int):
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def __bool__(self):
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return self
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check(Baz())
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# __bool__() must return a bool not an int
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class Spam(int):
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def __bool__(self):
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return 1
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check(Spam())
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class Eggs:
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def __len__(self):
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return -1
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self.assertRaises(ValueError, bool, Eggs())
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def test_from_bytes(self):
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self.assertIs(bool.from_bytes(b'\x00'*8, 'big'), False)
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self.assertIs(bool.from_bytes(b'abcd', 'little'), True)
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def test_sane_len(self):
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# this test just tests our assumptions about __len__
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# this will start failing if __len__ changes assertions
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for badval in ['illegal', -1, 1 << 32]:
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class A:
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def __len__(self):
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return badval
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try:
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bool(A())
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except (Exception) as e_bool:
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try:
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len(A())
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except (Exception) as e_len:
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self.assertEqual(str(e_bool), str(e_len))
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def test_blocked(self):
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class A:
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__bool__ = None
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self.assertRaises(TypeError, bool, A())
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class B:
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def __len__(self):
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return 10
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__bool__ = None
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self.assertRaises(TypeError, bool, B())
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def test_real_and_imag(self):
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self.assertEqual(True.real, 1)
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self.assertEqual(True.imag, 0)
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self.assertIs(type(True.real), int)
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self.assertIs(type(True.imag), int)
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self.assertEqual(False.real, 0)
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self.assertEqual(False.imag, 0)
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self.assertIs(type(False.real), int)
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self.assertIs(type(False.imag), int)
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def test_always_is_integer(self):
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# Issue #26680: Incorporating number.is_integer into bool
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self.assertTrue(all(b.is_integer() for b in (False, True)))
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def test_main():
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support.run_unittest(BoolTest)
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if __name__ == "__main__":
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test_main()
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