GraphQL\Tests\Validator\TestCase::expectInvalid PHP Method

    function expectInvalid($schema, $rules, $queryString, $expectedErrors)
    {
        $errors = DocumentValidator::validate($schema, Parser::parse($queryString), $rules);
        $this->assertNotEmpty($errors, 'GraphQL should not validate');
        $this->assertEquals($expectedErrors, array_map(['GraphQL\\Error\\Error', 'formatError'], $errors));
        return $errors;
    }