SylvainDe / DidYouMean-Python

        self.throws(code, INVALIDSYNTAX, [], from_version(version2))

        self.runs(new_code)

    def test_old_comparison(self):

        """<> comparison is removed, != always works."""

        code = '1 {0} 2'

        old, new = '<>', '!='

        version = (3, 0)

        old_code, new_code = format_str(code, old, new)

        self.runs(old_code, up_to_version(version))

        self.throws(

            old_code,

            INVALIDCOMP,

            "'!='",

            from_version(version),

            'pypy')

        self.throws(

            old_code,

            INVALIDSYNTAX,

            "'!='",

            from_version(version),

            'cython')

        self.runs(new_code)

    def test_missing_colon(self):

        """Missing colon is a classic mistake."""

        code = func_gen() + 'some_func.{0}'

        attributes = [('func_name', '__name__', []),

                      ('func_doc', '__doc__', []),

                      ('func_defaults', '__defaults__', ["'__defaults__'"]),

                      ('func_dict', '__dict__', []),

                      ('func_closure', '__closure__', []),

                      ('func_globals', '__globals__', []),

                      ('func_code', '__code__', [])]

        for (old_att, new_att, sugg) in attributes:

            old_code, new_code = format_str(code, old_att, new_att)

            self.runs(old_code, up_to_version(version))

            self.throws(old_code, ATTRIBUTEERROR, sugg, from_version(version))

            self.runs(new_code)

    def test_removed_method_attributes(self):

        """Some methods attributes are removed."""

        # NICE_TO_HAVE

        version = (3, 0)

        code = 'FoobarClass().some_method.{0}'

        attributes = [('im_func', '__func__', []),

                      ('im_self', '__self__', []),

                      ('im_class', '__self__.__class__', ["'__class__'"])]

        for (old_att, new_att, sugg) in attributes:

            old_code, new_code = format_str(code, old_att, new_att)

            self.runs(old_code, up_to_version(version))

            self.throws(old_code, ATTRIBUTEERROR, sugg, from_version(version))