GraphQL\Tests\StartWarsValidationTest::testThatNonExistentFieldsAreInvalid PHP Method

    public function testThatNonExistentFieldsAreInvalid()
    {
        $query = '
        query HeroSpaceshipQuery {
          hero {
            favoriteSpaceship
          }
        }
        ';
        $errors = $this->validationErrors($query);
        $this->assertEquals(false, empty($errors));
    }