ForumValidationTest.php

<?php

namespace Drupal\Tests\forum\Kernel;

use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
use Drupal\node\Entity\Node;
use Drupal\taxonomy\Entity\Term;

/**
 * Tests forum validation constraints.
 *
 * @group forum
 */
class ForumValidationTest extends EntityKernelTestBase {
    
    /**
     * Modules to install.
     *
     * @var array
     */
    protected static $modules = [
        'node',
        'options',
        'comment',
        'taxonomy',
        'forum',
    ];
    
    /**
     * Tests the forum validation constraints.
     */
    public function testValidation() {
        // Add a forum.
        $forum = Term::create([
            'name' => 'forum 1',
            'vid' => 'forums',
            'forum_container' => 0,
        ]);
        // Add a container.
        $container = Term::create([
            'name' => 'container 1',
            'vid' => 'forums',
            'forum_container' => 1,
        ]);
        // Add a forum post.
        $forum_post = Node::create([
            'type' => 'forum',
            'title' => 'Do these pants make my butt look big?',
        ]);
        $violations = $forum_post->validate();
        $this->assertCount(1, $violations);
        $this->assertEquals('This value should not be null.', $violations[0]->getMessage());
        // Add the forum term.
        $forum_post->set('taxonomy_forums', $forum);
        $violations = $forum_post->validate();
        $this->assertCount(0, $violations);
        // Try to use a container.
        $forum_post->set('taxonomy_forums', $container);
        $violations = $forum_post->validate();
        $this->assertCount(1, $violations);
        $this->assertEquals(t('The item %forum is a forum container, not a forum. Select one of the forums below instead.', [
            '%forum' => $container->label(),
        ]), $violations[0]->getMessage());
    }

}