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//usr/lib/python2.4/test/test_contains.py
from test.test_support import TestFailed, have_unicode class base_set: def __init__(self, el): self.el = el class set(base_set): def __contains__(self, el): return self.el == el class seq(base_set): def __getitem__(self, n): return [self.el][n] def check(ok, *args): if not ok: raise TestFailed, " ".join(map(str, args)) a = base_set(1) b = set(1) c = seq(1) check(1 in b, "1 not in set(1)") check(0 not in b, "0 in set(1)") check(1 in c, "1 not in seq(1)") check(0 not in c, "0 in seq(1)") try: 1 in a check(0, "in base_set did not raise error") except TypeError: pass try: 1 not in a check(0, "not in base_set did not raise error") except TypeError: pass # Test char in string check('c' in 'abc', "'c' not in 'abc'") check('d' not in 'abc', "'d' in 'abc'") check('' in '', "'' not in ''") check('' in 'abc', "'' not in 'abc'") try: None in 'abc' check(0, "None in 'abc' did not raise error") except TypeError: pass if have_unicode: # Test char in Unicode check('c' in unicode('abc'), "'c' not in u'abc'") check('d' not in unicode('abc'), "'d' in u'abc'") check('' in unicode(''), "'' not in u''") check(unicode('') in '', "u'' not in ''") check(unicode('') in unicode(''), "u'' not in u''") check('' in unicode('abc'), "'' not in u'abc'") check(unicode('') in 'abc', "u'' not in 'abc'") check(unicode('') in unicode('abc'), "u'' not in u'abc'") try: None in unicode('abc') check(0, "None in u'abc' did not raise error") except TypeError: pass # Test Unicode char in Unicode check(unicode('c') in unicode('abc'), "u'c' not in u'abc'") check(unicode('d') not in unicode('abc'), "u'd' in u'abc'") # Test Unicode char in string check(unicode('c') in 'abc', "u'c' not in 'abc'") check(unicode('d') not in 'abc', "u'd' in 'abc'") # A collection of tests on builtin sequence types a = range(10) for i in a: check(i in a, "%r not in %r" % (i, a)) check(16 not in a, "16 not in %r" % (a,)) check(a not in a, "%s not in %r" % (a, a)) a = tuple(a) for i in a: check(i in a, "%r not in %r" % (i, a)) check(16 not in a, "16 not in %r" % (a,)) check(a not in a, "%r not in %r" % (a, a)) class Deviant1: """Behaves strangely when compared This class is designed to make sure that the contains code works when the list is modified during the check. """ aList = range(15) def __cmp__(self, other): if other == 12: self.aList.remove(12) self.aList.remove(13) self.aList.remove(14) return 1 check(Deviant1() not in Deviant1.aList, "Deviant1 failed") class Deviant2: """Behaves strangely when compared This class raises an exception during comparison. That in turn causes the comparison to fail with a TypeError. """ def __cmp__(self, other): if other == 4: raise RuntimeError, "gotcha" try: check(Deviant2() not in a, "oops") except TypeError: pass