BlockContentValidationTest.php

<?php

namespace Drupal\Tests\block_content\Functional;

use Drupal\Component\Render\FormattableMarkup;

/**
 * Tests block content validation constraints.
 *
 * @group block_content
 */
class BlockContentValidationTest extends BlockContentTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests the block content validation constraints.
     */
    public function testValidation() {
        // Add a block.
        $description = $this->randomMachineName();
        $block = $this->createBlockContent($description, 'basic');
        // Validate the block.
        $violations = $block->validate();
        // Make sure we have no violations.
        $this->assertCount(0, $violations);
        // Save the block.
        $block->save();
        // Add another block with the same description.
        $block = $this->createBlockContent($description, 'basic');
        // Validate this block.
        $violations = $block->validate();
        // Make sure we have 1 violation.
        $this->assertCount(1, $violations);
        // Make sure the violation is on the info property
        $this->assertEquals('info', $violations[0]->getPropertyPath());
        // Make sure the message is correct.
        $this->assertEquals(new FormattableMarkup('A custom block with Block description %value already exists.', [
            '%value' => $block->label(),
        ]), $violations[0]->getMessage());
    }

}