Method test_feature_version_flag

Lib/test/test_ast/test_ast.py:3586–3607

(self)

                self.check_output(source, expect, flag)

    def test_feature_version_flag(self):
        # test 'python -m ast --feature-version 3.9/3.10'
        source = '''
            match x:
                case 1:
                    pass
        '''
        expect = '''
            Module(
               body=[
                  Match(
                     subject=Name(id='x'),
                     cases=[
                        match_case(
                           pattern=MatchValue(
                              value=Constant(value=1)),
                           body=[
                              Pass()])])])
        '''
        self.check_output(source, expect, '--feature-version=3.10')
        with self.assertRaises(SyntaxError):
            self.invoke_ast('--feature-version=3.9')

    def test_no_optimize_flag(self):
        # test 'python -m ast -O/--optimize -1/0'