UserNameItemTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\user\Unit;

use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Tests\UnitTestCase;
use Drupal\user\UserNameItem;

/**
 * Defines a test for the UserNameItem field-type.
 *
 * @group Field
 * @coversDefaultClass \Drupal\user\UserNameItem
 */
class UserNameItemTest extends UnitTestCase {
    
    /**
     * Tests generating sample values.
     *
     * @param int $max_length
     *   Maximum field length.
     *
     * @covers ::generateSampleValue
     * @dataProvider providerMaxLength
     */
    public function testGenerateSampleValue(int $max_length) : void {
        $definition = $this->prophesize(FieldDefinitionInterface::class);
        $definition->getSetting('max_length')
            ->willReturn($max_length);
        for ($i = 0; $i < 1000; $i++) {
            $sample_value = UserNameItem::generateSampleValue($definition->reveal());
            $this->assertLessThanOrEqual($max_length, mb_strlen($sample_value['value']));
            $this->assertEquals(trim($sample_value['value'], ' '), $sample_value['value']);
        }
    }
    
    /**
     * Data provider for maximum-lengths.
     *
     * @return array
     *   Test cases.
     */
    public static function providerMaxLength() : array {
        return [
            '32' => [
                32,
            ],
            '255' => [
                255,
            ],
            '500' => [
                500,
            ],
            '15' => [
                15,
            ],
            '64' => [
                64,
            ],
        ];
    }

}