# Test properties of bool promised by PEP 285 import unittest import math class BoolTest(unittest.TestCase): # def test_subclass(self): # try: # class C(bool): # pass # except TypeError: # pass # else: # self.fail("bool should not be subclassable") # # self.assertRaises(TypeError, int.__new__, bool, 0) # def test_repr(self): # self.assertEqual(repr(False), 'False') # self.assertEqual(repr(True), 'True') # self.assertEqual(eval(repr(False)), False) # self.assertEqual(eval(repr(True)), True) def test_str(self): self.assertEqual(str(False), 'False') self.assertEqual(str(True), 'True') def test_int(self): self.assertEqual(int(False), 0) # self.assertIsNot(int(False), False) self.assertEqual(int(True), 1) # self.assertIsNot(int(True), True) self.assertEqual([1,2][True], 2) self.assertEqual([1,2][False], 1) def test_float(self): self.assertEqual(float(False), 0.0) self.assertIsNot(float(False), False) self.assertEqual(float(True), 1.0) self.assertIsNot(float(True), True) def test_math(self): self.assertEqual(+False, 0) # self.assertIsNot(+False, False) self.assertEqual(-False, 0) # self.assertIsNot(-False, False) self.assertEqual(abs(False), 0) # self.assertIsNot(abs(False), False) self.assertEqual(+True, 1) # self.assertIsNot(+True, True) self.assertEqual(-True, -1) self.assertEqual(abs(True), 1) # self.assertIsNot(abs(True), True) self.assertEqual(~False, -1) self.assertEqual(~True, -2) self.assertEqual(False+2, 2) self.assertEqual(True+2, 3) self.assertEqual(2+False, 2) self.assertEqual(2+True, 3) self.assertEqual(False+False, 0) # self.assertIsNot(False+False, False) self.assertEqual(False+True, 1) # self.assertIsNot(False+True, True) self.assertEqual(True+False, 1) # self.assertIsNot(True+False, True) self.assertEqual(True+True, 2) self.assertEqual(True-True, 0) # self.assertIsNot(True-True, False) self.assertEqual(False-False, 0) # self.assertIsNot(False-False, False) self.assertEqual(True-False, 1) # self.assertIsNot(True-False, True) self.assertEqual(False-True, -1) self.assertEqual(True*1, 1) self.assertEqual(False*1, 0) # self.assertIsNot(False*1, False) self.assertEqual(True/1, 1) self.assertIsNot(True/1, True) self.assertEqual(False/1, 0) self.assertIsNot(False/1, False) self.assertEqual(True%1, 0) # self.assertIsNot(True%1, False) self.assertEqual(True%2, 1) # self.assertIsNot(True%2, True) self.assertEqual(False%1, 0) # self.assertIsNot(False%1, False) for b in False, True: for i in 0, 1, 2: self.assertEqual(b**i, int(b)**i) # self.assertIsNot(b**i, bool(int(b)**i)) for a in False, True: for b in False, True: self.assertIs(a&b, bool(int(a)&int(b))) self.assertIs(a|b, bool(int(a)|int(b))) self.assertIs(a^b, bool(int(a)^int(b))) self.assertEqual(a&int(b), int(a)&int(b)) # self.assertIsNot(a&int(b), bool(int(a)&int(b))) self.assertEqual(a|int(b), int(a)|int(b)) # self.assertIsNot(a|int(b), bool(int(a)|int(b))) self.assertEqual(a^int(b), int(a)^int(b)) # self.assertIsNot(a^int(b), bool(int(a)^int(b))) self.assertEqual(int(a)&b, int(a)&int(b)) # self.assertIsNot(int(a)&b, bool(int(a)&int(b))) self.assertEqual(int(a)|b, int(a)|int(b)) # self.assertIsNot(int(a)|b, bool(int(a)|int(b))) self.assertEqual(int(a)^b, int(a)^int(b)) # self.assertIsNot(int(a)^b, bool(int(a)^int(b))) self.assertIs(1==1, True) self.assertIs(1==0, False) self.assertIs(0<1, True) self.assertIs(1<0, False) self.assertIs(0<=0, True) self.assertIs(1<=0, False) self.assertIs(1>0, True) self.assertIs(1>1, False) self.assertIs(1>=1, True) self.assertIs(0>=1, False) self.assertIs(0!=1, True) self.assertIs(0!=0, False) x = [1] self.assertIs(x is x, True) self.assertIs(x is not x, False) self.assertIs(1 in x, True) self.assertIs(0 in x, False) self.assertIs(1 not in x, False) self.assertIs(0 not in x, True) x = {1: 2} self.assertIs(x is x, True) self.assertIs(x is not x, False) self.assertIs(1 in x, True) self.assertIs(0 in x, False) self.assertIs(1 not in x, False) self.assertIs(0 not in x, True) self.assertIs(not True, False) self.assertIs(not False, True) def test_convert(self): # self.assertRaises(TypeError, bool, 42, 42) self.assertIs(bool(1), True) self.assertIs(bool(-1), True) # self.assertIs(bool(), False) self.assertIs(bool(0), False) self.assertIs(bool(0.0), False) self.assertIs(bool(10), True) self.assertIs(bool(""), False) self.assertIs(bool("hello"), True) self.assertIs(bool(''), False) self.assertIs(bool('False'), True) self.assertIs(bool(()), False) self.assertIs(bool((2,)), True) self.assertIs(bool([]), False) self.assertIs(bool([12]), True) self.assertIs(bool({}), False) self.assertIs(bool({1:2}), True) self.assertIs(bool(None), False) self.assertIs(bool(False), False) self.assertIs(bool(True), True) def test_format(self): self.assertEqual("%d" % False, "0") self.assertEqual("%d" % True, "1") self.assertEqual("%x" % False, "0") self.assertEqual("%x" % True, "1") def test_hasattr(self): self.assertIs(hasattr([], "append"), True) self.assertIs(hasattr([], "wobble"), False) def test_callable(self): self.assertIs(callable(len), True) self.assertIs(callable(1), False) # def test_issubclass(self): # self.assertIs(issubclass(bool, int), True) # self.assertIs(issubclass(int, bool), False) def test_contains(self): self.assertIs(1 in {}, False) self.assertIs(1 in {1:1}, True) def test_string(self): self.assertIs("xyz".endswith("z"), True) self.assertIs("xyz".endswith("x"), False) self.assertIs("xyz0123".isalnum(), True) self.assertIs("@#$%".isalnum(), False) self.assertIs("xyz".isalpha(), True) self.assertIs("@#$%".isalpha(), False) self.assertIs("0123".isdigit(), True) self.assertIs("xyz".isdigit(), False) self.assertIs("xyz".islower(), True) self.assertIs("XYZ".islower(), False) # self.assertIs("0123".isdecimal(), True) # self.assertIs("xyz".isdecimal(), False) self.assertIs("0123".isnumeric(), True) self.assertIs("xyz".isnumeric(), False) self.assertIs(" ".isspace(), True) self.assertIs("\xa0".isspace(), True) # self.assertIs("\u3000".isspace(), True) self.assertIs("XYZ".isspace(), False) self.assertIs("X".istitle(), True) self.assertIs("x".istitle(), False) self.assertIs("XYZ".isupper(), True) self.assertIs("xyz".isupper(), False) self.assertIs("xyz".startswith("x"), True) self.assertIs("xyz".startswith("z"), False) def test_boolean(self): self.assertEqual(True & 1, 1) self.assertNotIsInstance(True & 1, bool) self.assertIs(True & True, True) self.assertEqual(True | 1, 1) self.assertNotIsInstance(True | 1, bool) self.assertIs(True | True, True) self.assertEqual(True ^ 1, 0) self.assertNotIsInstance(True ^ 1, bool) self.assertIs(True ^ True, False) def foo(x): if true: return x self.assertRaises(NameError, foo, 1) def test_types(self): # types are always true. for t in [bool, complex, dict, float, int, list, object, set, str, tuple, type]: self.assertIs(bool(t), True) def test_operator(self): import operator self.assertIs(operator.truth(0), False) self.assertIs(operator.truth(1), True) # self.assertIs(operator.not_(1), False) # self.assertIs(operator.not_(0), True) self.assertIs(operator.contains([], 1), False) self.assertIs(operator.contains([1], 1), True) self.assertIs(operator.lt(0, 0), False) self.assertIs(operator.lt(0, 1), True) self.assertIs(operator.is_(True, True), True) self.assertIs(operator.is_(True, False), False) self.assertIs(operator.is_not(True, True), False) self.assertIs(operator.is_not(True, False), True) def test_boolean_arithmetic(self): self.assertEqual(1 + True, 2) self.assertEqual(2 - True, 1) self.assertEqual(3 * False, 0) self.assertEqual(4 / True, 4.0) self.assertEqual(5 % True, 0) self.assertEqual(6 ** False, 1) self.assertEqual(1.5 + True, 2.5) self.assertEqual(2.5 - True, 1.5) self.assertEqual(3.5 * False, 0.0) self.assertEqual(4.5 / True, 4.5) self.assertEqual(5.5 % True, 0.5) self.assertEqual(6.5 ** False, 1.0) self.assertEqual(math.fabs(True), 1.0) self.assertEqual(math.cos(True), 0.5403023058681398) def test_truth_value_testing(self): class A: def __len__(self): return 0 self.assertFalse(bool(A())) class B: def __len__(self): return False self.assertFalse(bool(B())) class C: def __nonzero__(self): return 0 self.assertTrue(bool(C())) class D: def __nonzero__(self): return False self.assertTrue(bool(D())) class E: def __len__(self): return 1 self.assertTrue(bool(E())) class F: def __bool__(self): return True def __len__(self): return 0 self.assertTrue(bool(F())) class F: def __bool__(self): return False def __len__(self): return 1 self.assertFalse(bool(F())) class G: def __nonzero__ (self): return 1 def __len__ (self): return 0 self.assertFalse(bool(G())) class A: def __nonzero__(self): return "not the right value" self.assertTrue(bool(A())) class B: def __len__(self): return "not the right value" self.assertRaises(TypeError, bool, B()) class C: def __bool__(self): return 1 self.assertRaises(TypeError, bool, C()) self.assertEqual(C().__bool__(), 1) def test_assert(self): def func(): return "dog" def foo(x, y): assert x == y return 0 self.assertRaises(AssertionError, foo, 1, 2) self.assertEqual(0, foo(1, 1)) self.assertEqual(0, foo("dog", func())) # def test_marshal(self): # import marshal # self.assertIs(marshal.loads(marshal.dumps(True)), True) # self.assertIs(marshal.loads(marshal.dumps(False)), False) # # def test_convert_to_bool(self): # # Verify that TypeError occurs when bad things are returned # # from __bool__(). This isn't really a bool test, but # # it's related. # check = lambda o: self.assertRaises(TypeError, bool, o) # class Foo(object): # def __bool__(self): # return self # check(Foo()) # # class Bar(object): # def __bool__(self): # return "Yes" # check(Bar()) # # class Baz(int): # def __bool__(self): # return self # check(Baz()) # # # __bool__() must return a bool not an int # class Spam(int): # def __bool__(self): # return 1 # check(Spam()) # # class Eggs: # def __len__(self): # return -1 # self.assertRaises(ValueError, bool, Eggs()) # def test_sane_len(self): # # this test just tests our assumptions about __len__ # # this will start failing if __len__ changes assertions # for badval in ['illegal', -1, 1 << 32]: # class A: # def __len__(self): # return badval # try: # bool(A()) # except (Exception) as e_bool: # try: # len(A()) # except (Exception) as e_len: # self.assertEqual(str(e_bool), str(e_len)) # def test_blocked(self): # class A: # __bool__ = None # self.assertRaises(TypeError, bool, A()) # # class B: # def __len__(self): # return 10 # __bool__ = None # self.assertRaises(TypeError, bool, B()) # def test_real_and_imag(self): # self.assertEqual(True.real, 1) # self.assertEqual(True.imag, 0) # self.assertIs(type(True.real), int) # self.assertIs(type(True.imag), int) # self.assertEqual(False.real, 0) # self.assertEqual(False.imag, 0) # self.assertIs(type(False.real), int) # self.assertIs(type(False.imag), int) if __name__ == "__main__": unittest.main()