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375 lines
12 KiB
375 lines
12 KiB
3 years ago
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# Test properties of bool promised by PEP 285
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import unittest
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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", encoding="utf-8") 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)
|
||
|
|
self.assertIs(type(False.real), int)
|
||
|
|
self.assertIs(type(False.imag), int)
|
||
|
|
|
||
|
|
def test_bool_called_at_least_once(self):
|
||
|
|
class X:
|
||
|
|
def __init__(self):
|
||
|
|
self.count = 0
|
||
|
|
def __bool__(self):
|
||
|
|
self.count += 1
|
||
|
|
return True
|
||
|
|
|
||
|
|
def f(x):
|
||
|
|
if x or True:
|
||
|
|
pass
|
||
|
|
|
||
|
|
x = X()
|
||
|
|
f(x)
|
||
|
|
self.assertGreaterEqual(x.count, 1)
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
unittest.main()
|