AssertHelperTraitTest.php

<?php

namespace Drupal\Tests;

use Drupal\Core\Render\Markup;

/**
 * @coversDefaultClass \Drupal\Tests\AssertHelperTrait
 * @group simpletest
 * @group Tests
 */
class AssertHelperTraitTest extends UnitTestCase {
    
    /**
     * @covers ::castSafeStrings
     * @dataProvider providerCastSafeStrings
     */
    public function testCastSafeStrings($expected, $value) {
        $class = new AssertHelperTestClass();
        $this->assertSame($expected, $class->testMethod($value));
    }
    public function providerCastSafeStrings() {
        $safe_string = Markup::create('test safe string');
        return [
            [
                'test simple string',
                'test simple string',
            ],
            [
                [
                    'test simple array',
                    'test simple array',
                ],
                [
                    'test simple array',
                    'test simple array',
                ],
            ],
            [
                'test safe string',
                $safe_string,
            ],
            [
                [
                    'test safe string',
                    'test safe string',
                ],
                [
                    $safe_string,
                    $safe_string,
                ],
            ],
            [
                [
                    'test safe string',
                    'mixed array',
                    'test safe string',
                ],
                [
                    $safe_string,
                    'mixed array',
                    $safe_string,
                ],
            ],
        ];
    }

}
class AssertHelperTestClass {
    use AssertHelperTrait;
    public function testMethod($value) {
        return $this->castSafeStrings($value);
    }

}