FormAjaxResponseBuilderTest.php

<?php

namespace Drupal\Tests\Core\Form;

use Drupal\Core\Ajax\AjaxResponse;
use Drupal\Core\Ajax\AlertCommand;
use Drupal\Core\Form\FormAjaxResponseBuilder;
use Drupal\Core\Form\FormState;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Tests\UnitTestCase;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Exception\HttpException;

/**
 * @coversDefaultClass \Drupal\Core\Form\FormAjaxResponseBuilder
 * @group Form
 */
class FormAjaxResponseBuilderTest extends UnitTestCase {
    
    /**
     * @var \Drupal\Core\Render\MainContent\MainContentRendererInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $renderer;
    
    /**
     * @var \Drupal\Core\Routing\RouteMatchInterface|\PHPUnit\Framework\MockObject\MockObject
     */
    protected $routeMatch;
    
    /**
     * @var \Drupal\Core\Form\FormAjaxResponseBuilder
     */
    protected $formAjaxResponseBuilder;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->renderer = $this->createMock('Drupal\\Core\\Render\\MainContent\\MainContentRendererInterface');
        $this->routeMatch = $this->createMock('Drupal\\Core\\Routing\\RouteMatchInterface');
        $this->formAjaxResponseBuilder = new FormAjaxResponseBuilder($this->renderer, $this->routeMatch);
    }
    
    /**
     * @covers ::buildResponse
     */
    public function testBuildResponseNoTriggeringElement() {
        $this->renderer
            ->expects($this->never())
            ->method('renderResponse');
        $request = new Request();
        $form = [];
        $form_state = new FormState();
        $commands = [];
        $this->expectException(HttpException::class);
        $this->formAjaxResponseBuilder
            ->buildResponse($request, $form, $form_state, $commands);
    }
    
    /**
     * @covers ::buildResponse
     */
    public function testBuildResponseNoCallable() {
        $this->renderer
            ->expects($this->never())
            ->method('renderResponse');
        $request = new Request();
        $form = [];
        $form_state = new FormState();
        $triggering_element = [];
        $form_state->setTriggeringElement($triggering_element);
        $commands = [];
        $this->expectException(HttpException::class);
        $this->formAjaxResponseBuilder
            ->buildResponse($request, $form, $form_state, $commands);
    }
    
    /**
     * @covers ::buildResponse
     */
    public function testBuildResponseRenderArray() {
        $triggering_element = [
            '#ajax' => [
                'callback' => function (array $form, FormStateInterface $form_state) {
                    return $form['test'];
                },
            ],
        ];
        $request = new Request();
        $form = [
            'test' => [
                '#type' => 'textfield',
            ],
        ];
        $form_state = new FormState();
        $form_state->setTriggeringElement($triggering_element);
        $commands = [];
        $this->renderer
            ->expects($this->once())
            ->method('renderResponse')
            ->with($form['test'], $request, $this->routeMatch)
            ->willReturn(new AjaxResponse([]));
        $result = $this->formAjaxResponseBuilder
            ->buildResponse($request, $form, $form_state, $commands);
        $this->assertInstanceOf('\\Drupal\\Core\\Ajax\\AjaxResponse', $result);
        $this->assertSame($commands, $result->getCommands());
    }
    
    /**
     * @covers ::buildResponse
     */
    public function testBuildResponseResponse() {
        $triggering_element = [
            '#ajax' => [
                'callback' => function (array $form, FormStateInterface $form_state) {
                    return new AjaxResponse([]);
                },
            ],
        ];
        $request = new Request();
        $form = [];
        $form_state = new FormState();
        $form_state->setTriggeringElement($triggering_element);
        $commands = [];
        $this->renderer
            ->expects($this->never())
            ->method('renderResponse');
        $result = $this->formAjaxResponseBuilder
            ->buildResponse($request, $form, $form_state, $commands);
        $this->assertInstanceOf('\\Drupal\\Core\\Ajax\\AjaxResponse', $result);
        $this->assertSame($commands, $result->getCommands());
    }
    
    /**
     * @covers ::buildResponse
     */
    public function testBuildResponseWithCommands() {
        $triggering_element = [
            '#ajax' => [
                'callback' => function (array $form, FormStateInterface $form_state) {
                    return new AjaxResponse([]);
                },
            ],
        ];
        $request = new Request();
        $form = [
            'test' => [
                '#type' => 'textfield',
            ],
        ];
        $form_state = new FormState();
        $form_state->setTriggeringElement($triggering_element);
        $commands = [
            new AlertCommand('alert!'),
        ];
        $commands_expected = [];
        $commands_expected[] = [
            'command' => 'alert',
            'text' => 'alert!',
        ];
        $this->renderer
            ->expects($this->never())
            ->method('renderResponse');
        $result = $this->formAjaxResponseBuilder
            ->buildResponse($request, $form, $form_state, $commands);
        $this->assertInstanceOf('\\Drupal\\Core\\Ajax\\AjaxResponse', $result);
        $this->assertSame($commands_expected, $result->getCommands());
    }
    
    /**
     * @covers ::buildResponse
     */
    public function testBuildResponseWithUpdateCommand() {
        $triggering_element = [
            '#ajax' => [
                'callback' => function (array $form, FormStateInterface $form_state) {
                    return new AjaxResponse([]);
                },
            ],
        ];
        $request = new Request();
        $form = [
            '#build_id' => 'the_build_id',
            '#build_id_old' => 'a_new_build_id',
            'test' => [
                '#type' => 'textfield',
            ],
        ];
        $form_state = new FormState();
        $form_state->setTriggeringElement($triggering_element);
        $commands = [
            new AlertCommand('alert!'),
        ];
        $commands_expected = [];
        $commands_expected[] = [
            'command' => 'update_build_id',
            'old' => 'a_new_build_id',
            'new' => 'the_build_id',
        ];
        $commands_expected[] = [
            'command' => 'alert',
            'text' => 'alert!',
        ];
        $this->renderer
            ->expects($this->never())
            ->method('renderResponse');
        $result = $this->formAjaxResponseBuilder
            ->buildResponse($request, $form, $form_state, $commands);
        $this->assertInstanceOf('\\Drupal\\Core\\Ajax\\AjaxResponse', $result);
        $this->assertSame($commands_expected, $result->getCommands());
    }

}