Method test_none_arguments

Lib/test/test_bytes.py:922–963

(self)

        self.assertRaises(TypeError, self.type2test.maketrans, 'abc', 'def')

    def test_none_arguments(self):
        # issue 11828
        b = self.type2test(b'hello')
        l = self.type2test(b'l')
        h = self.type2test(b'h')
        x = self.type2test(b'x')
        o = self.type2test(b'o')

        self.assertEqual(2, b.find(l, None))
        self.assertEqual(3, b.find(l, -2, None))
        self.assertEqual(2, b.find(l, None, -2))
        self.assertEqual(0, b.find(h, None, None))

        self.assertEqual(3, b.rfind(l, None))
        self.assertEqual(3, b.rfind(l, -2, None))
        self.assertEqual(2, b.rfind(l, None, -2))
        self.assertEqual(0, b.rfind(h, None, None))

        self.assertEqual(2, b.index(l, None))
        self.assertEqual(3, b.index(l, -2, None))
        self.assertEqual(2, b.index(l, None, -2))
        self.assertEqual(0, b.index(h, None, None))

        self.assertEqual(3, b.rindex(l, None))
        self.assertEqual(3, b.rindex(l, -2, None))
        self.assertEqual(2, b.rindex(l, None, -2))
        self.assertEqual(0, b.rindex(h, None, None))

        self.assertEqual(2, b.count(l, None))
        self.assertEqual(1, b.count(l, -2, None))
        self.assertEqual(1, b.count(l, None, -2))
        self.assertEqual(0, b.count(x, None, None))

        self.assertEqual(True, b.endswith(o, None))
        self.assertEqual(True, b.endswith(o, -2, None))
        self.assertEqual(True, b.endswith(l, None, -2))
        self.assertEqual(False, b.endswith(x, None, None))

        self.assertEqual(True, b.startswith(h, None))
        self.assertEqual(True, b.startswith(l, -2, None))
        self.assertEqual(True, b.startswith(h, None, -2))
        self.assertEqual(False, b.startswith(x, None, None))

    def test_integer_arguments_out_of_byte_range(self):
        b = self.type2test(b'hello')