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Lib/json/tests/test_speedups.py
from json.tests import CTest


class TestSpeedups(CTest):
    def test_scanstring(self):
        self.assertEqual(self.json.decoder.scanstring.__module__, "_json")
        self.assertIs(self.json.decoder.scanstring, self.json.decoder.c_scanstring)

    def test_encode_basestring_ascii(self):
        self.assertEqual(self.json.encoder.encode_basestring_ascii.__module__,
                         "_json")
        self.assertIs(self.json.encoder.encode_basestring_ascii,
                      self.json.encoder.c_encode_basestring_ascii)

class TestDecode(CTest):
    def test_make_scanner(self):
        self.assertRaises(AttributeError, self.json.scanner.c_make_scanner, 1)

    def test_make_encoder(self):
        self.assertRaises(TypeError, self.json.encoder.c_make_encoder,
            None,
            "\xCD\x7D\x3D\x4E\x12\x4C\xF9\x79\xD7\x52\xBA\x82\xF2\x27\x4A\x7D\xA0\xCA\x75",
            None)