def test_expandvars_environment_not_dict(self):
        TypeChecks._check_expandvars_inputs("", None)

        with self.assertRaisesRegexp(TypeError,
                                     re.compile(".*for.*environment.*")):
            TypeChecks._check_expandvars_inputs("", 1)
    def test_expandvars_value_not_string(self):
        TypeChecks._check_expandvars_inputs("", {})

        with self.assertRaisesRegexp(TypeError,
                                     re.compile(".*for.*value.*")):
            TypeChecks._check_expandvars_inputs(None, None)