Method test_maketrans_translate

Lib/test/test_str.py:406–481

(self)

        self.assertRaises(ValueError, ('\u0102' * 100).rindex, '\U00100304\u0102')

    def test_maketrans_translate(self):
        # these work with plain translate()
        self.checkequalnofix('bbbc', 'abababc', 'translate',
                             {ord('a'): None})
        self.checkequalnofix('iiic', 'abababc', 'translate',
                             {ord('a'): None, ord('b'): ord('i')})
        self.checkequalnofix('iiix', 'abababc', 'translate',
                             {ord('a'): None, ord('b'): ord('i'), ord('c'): 'x'})
        self.checkequalnofix('c', 'abababc', 'translate',
                             {ord('a'): None, ord('b'): ''})
        self.checkequalnofix('xyyx', 'xzx', 'translate',
                             {ord('z'): 'yy'})

        # this needs maketrans()
        self.checkequalnofix('abababc', 'abababc', 'translate',
                             {'b': '<i>'})
        tbl = self.type2test.maketrans({'a': None, 'b': '<i>'})
        self.checkequalnofix('<i><i><i>c', 'abababc', 'translate', tbl)
        # test alternative way of calling maketrans()
        tbl = self.type2test.maketrans('abc', 'xyz', 'd')
        self.checkequalnofix('xyzzy', 'abdcdcbdddd', 'translate', tbl)

        # various tests switching from ASCII to latin1 or the opposite;
        # same length, remove a letter, or replace with a longer string.
        self.assertEqual("[a]".translate(str.maketrans('a', 'X')),
                         "[X]")
        self.assertEqual("[a]".translate(str.maketrans({'a': 'X'})),
                         "[X]")
        self.assertEqual("[a]".translate(str.maketrans({'a': None})),
                         "[]")
        self.assertEqual("[a]".translate(str.maketrans({'a': 'XXX'})),
                         "[XXX]")
        self.assertEqual("[a]".translate(str.maketrans({'a': '\xe9'})),
                         "[\xe9]")
        self.assertEqual('axb'.translate(str.maketrans({'a': None, 'b': '123'})),
                         "x123")
        self.assertEqual('axb'.translate(str.maketrans({'a': None, 'b': '\xe9'})),
                         "x\xe9")

        # test non-ASCII (don't take the fast-path)
        self.assertEqual("[a]".translate(str.maketrans({'a': '<\xe9>'})),
                         "[<\xe9>]")
        self.assertEqual("[\xe9]".translate(str.maketrans({'\xe9': 'a'})),
                         "[a]")
        self.assertEqual("[\xe9]".translate(str.maketrans({'\xe9': None})),
                         "[]")
        self.assertEqual("[\xe9]".translate(str.maketrans({'\xe9': '123'})),
                         "[123]")
        self.assertEqual("[a\xe9]".translate(str.maketrans({'a': '<\u20ac>'})),
                         "[<\u20ac>\xe9]")

        # with frozendict
        tbl = self.type2test.maketrans(frozendict({'s': 'S', 'T': 't'}))
        self.assertEqual(tbl, {ord('s'): 'S', ord('T'): 't'})
        self.assertEqual('sTan'.translate(tbl), 'Stan')
        tbl = self.type2test.maketrans(frozendict({'a': None, 'b': '<i>'}))
        self.checkequalnofix('<i><i><i>c', 'abababc', 'translate', tbl)