InOperatorTest.php

<?php

namespace Drupal\Tests\views\Unit\Plugin\filter;

use Drupal\Tests\UnitTestCase;
use Drupal\views\Plugin\views\filter\InOperator;

/**
 * @coversDefaultClass \Drupal\views\Plugin\views\filter\InOperator
 * @group views
 */
class InOperatorTest extends UnitTestCase {
    
    /**
     * @covers ::validate
     */
    public function testValidate() {
        $definition = [
            'title' => 'Is InOperator Test',
            'group' => 'Test',
            'options callback' => '\\Drupal\\Tests\\views\\Unit\\Plugin\\filter\\InOperatorTest::validate_options_callback',
        ];
        $filter = new InOperator([], 'in_operator', $definition);
        $filter->value = 'string';
        $filter->operator = 'in';
        $translation_stub = $this->getStringTranslationStub();
        $filter->setStringTranslation($translation_stub);
        $errors = $filter->validate();
        $this->assertSame('The value &#039;string&#039; is not an array for in on filter: ' . $filter->adminLabel(TRUE), (string) $errors[0]);
    }
    
    /**
     * @return array
     */
    public static function validate_options_callback() {
        return [
            'Yes',
            'No',
        ];
    }

}