LayoutDefaultTest.php

<?php

namespace Drupal\Tests\Core\Layout;

use Drupal\Core\Layout\LayoutDefault;
use Drupal\Core\Layout\LayoutDefinition;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\Core\Layout\LayoutDefault
 * @group Layout
 */
class LayoutDefaultTest extends UnitTestCase {
    
    /**
     * @covers ::build
     * @dataProvider providerTestBuild
     */
    public function testBuild($regions, $expected) {
        $definition = new LayoutDefinition([
            'theme_hook' => 'layout',
            'library' => 'core/drupal',
            'regions' => [
                'left' => [
                    'label' => 'Left',
                ],
                'right' => [
                    'label' => 'Right',
                ],
            ],
        ]);
        $expected += [
            '#settings' => [
                'label' => '',
            ],
            '#layout' => $definition,
            '#theme' => 'layout',
            '#attached' => [
                'library' => [
                    'core/drupal',
                ],
            ],
        ];
        $layout = new LayoutDefault([], '', $definition);
        $this->assertSame($expected, $layout->build($regions));
    }
    
    /**
     * Provides test data for ::testBuild().
     */
    public function providerTestBuild() {
        $data = [];
        // Empty regions are not added.
        $data['right_only'] = [
            [
                'right' => [
                    'foo' => 'bar',
                ],
            ],
            [
                'right' => [
                    'foo' => 'bar',
                ],
            ],
        ];
        // Regions will be in the order defined by the layout.
        $data['switched_order'] = [
            [
                'right' => [
                    'foo' => 'bar',
                ],
                'left' => [
                    'foo' => 'baz',
                ],
            ],
            [
                'left' => [
                    'foo' => 'baz',
                ],
                'right' => [
                    'foo' => 'bar',
                ],
            ],
        ];
        return $data;
    }

}