DevelEventInfoTest.php

<?php

namespace Drupal\Tests\devel\Functional;

use Drupal\Core\Url;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests event info pages and links.
 *
 * @group devel
 */
class DevelEventInfoTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'devel',
        'block',
    ];
    
    /**
     * The user for the test.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $develUser;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $this->drupalPlaceBlock('page_title_block');
        $this->develUser = $this->drupalCreateUser([
            'access devel information',
        ]);
        $this->drupalLogin($this->develUser);
    }
    
    /**
     * Tests event info menu link.
     */
    public function testEventsInfoMenuLink() {
        $this->drupalPlaceBlock('system_menu_block:devel');
        // Ensures that the events info link is present on the devel menu and that
        // it points to the correct page.
        $this->drupalGet('');
        $this->clickLink('Events Info');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->addressEquals('/devel/events');
        $this->assertSession()
            ->pageTextContains('Events');
    }
    
    /**
     * Tests event info page.
     */
    public function testEventList() {
        $event_dispatcher = \Drupal::service('event_dispatcher');
        $this->drupalGet('/devel/events');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextContains('Events');
        $page = $this->getSession()
            ->getPage();
        // Ensures that the event table is found.
        $table = $page->find('css', 'table.devel-event-list');
        $this->assertNotNull($table);
        // Ensures that the expected table headers are found.
        
        /** @var $headers \Behat\Mink\Element\NodeElement[] */
        $headers = $table->findAll('css', 'thead th');
        $this->assertEquals(3, count($headers));
        $expected_headers = [
            'Event Name',
            'Callable',
            'Priority',
        ];
        $actual_headers = array_map(function ($element) {
            return $element->getText();
        }, $headers);
        $this->assertSame($expected_headers, $actual_headers);
        // Ensures that all the events are listed in the table.
        $events = $event_dispatcher->getListeners();
        $event_header_row = $table->findAll('css', 'tbody tr th.devel-event-name-header');
        $this->assertEquals(count($events), count($event_header_row));
        // Tests the presence of some (arbitrarily chosen) events and related
        // listeners in the table. The event items are tested dynamically so no
        // test failures are expected if listeners change.
        $expected_events = [
            'config.delete',
            'kernel.request',
            'routing.route_alter',
        ];
        foreach ($expected_events as $event_name) {
            $listeners = $event_dispatcher->getListeners($event_name);
            // Ensures that the event header is present in the table.
            $event_header_row = $table->findAll('css', sprintf('tbody tr th:contains("%s")', $event_name));
            $this->assertNotNull($event_header_row);
            $this->assertEquals(1, count($event_header_row));
            // Ensures that all the event listener are listed in the table.
            
            /** @var $event_rows \Behat\Mink\Element\NodeElement[] */
            $event_rows = $table->findAll('css', sprintf('tbody tr:contains("%s")', $event_name));
            // Remove the header row.
            array_shift($event_rows);
            $this->assertEquals(count($listeners), count($event_rows));
            foreach ($listeners as $index => $listener) {
                
                /** @var $cells \Behat\Mink\Element\NodeElement[] */
                $cells = $event_rows[$index]->findAll('css', 'td');
                $this->assertEquals(3, count($cells));
                $cell_event_name = $cells[0];
                $this->assertEquals($event_name, $cell_event_name->getText());
                $this->assertTrue($cell_event_name->hasClass('table-filter-text-source'));
                $this->assertTrue($cell_event_name->hasClass('visually-hidden'));
                $cell_callable = $cells[1];
                is_callable($listener, TRUE, $callable_name);
                $this->assertEquals($callable_name, $cell_callable->getText());
                $cell_methods = $cells[2];
                $this->assertEquals($index, $cell_methods->getText());
            }
        }
        // Ensures that the page is accessible only to the users with the adequate
        // permissions.
        $this->drupalLogout();
        $this->drupalGet('devel/events');
        $this->assertSession()
            ->statusCodeEquals(403);
    }

}