from UnitTest import UnitTest class Stupid: pass class Foo: def __init__(self, v): self._v = v def __nonzero__(self): return self._v>0 def __len__(self): return 1 class Bar: def __init__(self, v): self._v = v def __len__(self): return self._v class BoolTest(UnitTest): def testBaseTypes(self): # meta test first self.assertTrue(True) self.assertFalse(False) # booleans self.assertTrue(bool(True)) self.assertFalse(bool(False)) self.assertTrue(True == True) self.assertFalse(False == True) # ints self.assertTrue(bool(1)) self.assertFalse(bool(0)) self.assertTrue(1) self.assertFalse(0) # strings self.assertTrue(bool('a')) self.assertFalse(bool('')) self.assertTrue('a') self.assertFalse('') def testObjects(self): # objects self.assertTrue(bool(Stupid())) self.assertTrue(Stupid()) # __nonzero__ has precedence self.assertFalse(bool(Foo(0))) self.assertTrue(bool(Foo(1))) self.assertFalse(Foo(0)) self.assertTrue(Foo(1)) # __len__ is used secondary self.assertFalse(bool(Bar(0))) self.assertTrue(bool(Bar(1))) self.assertFalse(Bar(0)) self.assertTrue(Bar(1)) # lists self.assertFalse(bool([])) self.assertTrue(bool([1])) self.assertFalse([]) self.assertTrue([1]) # dicts self.assertFalse(bool({})) self.assertTrue(bool({'x':1})) self.assertFalse({}) self.assertTrue({'x':1}) def testIfStatement(self): if({}): self.fail("Empty dict should not evaluate to True in If") else: self.assertTrue(True) if({1: 5}): self.assertTrue(True) else: self.fail("Non-empty dict should evaluate to True in If") if([]): self.fail("Empty dict should not evaluate to True in If") else: self.assertTrue(True) if([1]): self.assertTrue(True) else: self.fail("Non-empty lists should evaluate to True in If") if not []: self.assertTrue(True) else: self.fail("Non empty lists should not evaluate to True in If") if [1] and {}: self.fail("'[1] and {}' shoul evaluate to False") else: self.assertTrue(True) if [] or not {}: self.assertTrue(True) else: self.fail("'[] or not {}' shoul evaluate to True") if [] and not {}: self.fail("'[] and not {}' shoul evaluate to False") else: self.assertTrue(True) if 0 < 1 < 2: self.assertTrue(True) else: self.fail("if 0 < 1 < 2") i = [0, 2, 4] i = i.__iter__(); if 0 < i.next() < 4: self.fail("iter (0)") else: self.assertTrue(True) if 0 < i.next() < 4: self.assertTrue(True) else: self.fail("iter (2)") if 0 < i.next() < 4: self.fail("iter (4)") else: self.assertTrue(True) def testWhileStatement(self): while([]): self.fail("Empty lists should not evaluate to True in While") break; while([1]): return self.fail("None-empty lists should evaluate to True in While") def testLogic(self): x = 0 or None self.assertEqual(x, None, "0 or None should be None not %s" % repr(x) ) x = None and None self.assertEqual(x, None, "None or None should be None not %s" % repr(x) ) x = False or None self.assertEqual(x, None, "False or None should be None not %s" % repr(x) ) self.assertTrue((1 or 2) is 1, "(1 or 2) is 1") self.assertTrue((0 or 2) is 2, "(0 or 2) is 2") self.assertTrue((False or 0) is 0, "(False or 0) is 0") self.assertTrue((0 or False) is False, "(0 or False) is False") self.assertTrue((0 and 2) is 0, "(0 and 2) is 0") self.assertTrue((1 and 2) is 2, "(1 and 2) is 2") self.assertTrue((2 and 1) is 1, "(2 and 1) is 1") self.assertTrue(([] and 2) == [], "([] and 2) == []") try: self.assertTrue(({} and 2) == {}, "({} and 2) == {}") except: self.fail("Unexpected error on '({} and 2) == {}'") try: self.assertTrue((0 or False or {} or []) == [], "((0 or False or {} or []) == []") except: self.fail("Unexpected error on '(0 or False or {} or []) == []'") f = None try: self.assertTrue((f and f.test()) == None, "(f and f.test()) == None") except: self.fail("Unexpected error on '(f and f.test()) == None'") self.assertTrue(bool(None) is False, "bool(None) is False") self.assertTrue(bool(False) is False, "bool(False) is False") self.assertTrue(bool(0) is False, "bool(0) is False") self.assertTrue(bool(0.0) is False, "bool(0.0) is False") self.assertTrue(bool('') is False, "bool('') is False") self.assertTrue(bool([]) is False, "bool('') is False") self.assertTrue(bool({}) is False, "bool('') is False") self.assertTrue(not None is True, "not None is True") self.assertTrue(not False is True, "not False is True") self.assertTrue(not 0 is True, "not 0 is True") self.assertTrue(not 0.0 is True, "not 0.0 is True") self.assertTrue(not '' is True, "not '' is True") self.assertTrue(not [] is True, "not '' is True") self.assertTrue(not {} is True, "not '' is True") self.assertTrue(bool(1) is True, "bool('') is True") self.assertTrue(bool(1.0) is True, "bool('') is True") self.assertTrue(bool('a') is True, "bool('') is True") self.assertTrue(bool([1]) is True, "bool('') is True") self.assertTrue(bool({'a':1}) is True, "bool('') is True") self.assertTrue(not 1 is False, "not '' is False") self.assertTrue(not 1.0 is False, "not '' is False") self.assertTrue(not 'a' is False, "not '' is False") self.assertTrue(not [1] is False, "not '' is False") self.assertTrue(not {'a':1} is False, "not '' is False") d = {'hello': 5} d2 = d or {} try: tst = d == d2 self.assertTrue(tst, "#297 -non-empty object or {} should return the object") except TypeError: self.fail("#297 TypeError should not have been thrown") d = {} d2 = d or 5 try: tst = d2 == 5 self.assertTrue(tst, "#297 'empty object or 5' should return 5") except TypeError: self.fail("#297 TypeError should not have been thrown")