function BlockRenderOrderTest::testBlockRenderOrder

Tests the render order of the blocks.

File

core/modules/block/tests/src/Functional/BlockRenderOrderTest.php, line 42

Class

BlockRenderOrderTest

Tests blocks are being rendered in order by weight.

Namespace

Code

public function testBlockRenderOrder() : void {
    // Enable test blocks and place them in the same region.
    $region = 'header';
    $test_blocks = [
        'stark_powered' => [
            'weight' => -3,
            'id' => 'stark_powered',
            'label' => 'Test block A',
        ],
        'stark_by' => [
            'weight' => 3,
            'id' => 'stark_by',
            'label' => 'Test block C',
        ],
        'stark_drupal' => [
            'weight' => 3,
            'id' => 'stark_drupal',
            'label' => 'Test block B',
        ],
    ];
    // Place the test blocks.
    foreach ($test_blocks as $test_block) {
        $this->drupalPlaceBlock('system_powered_by_block', [
            'label' => $test_block['label'],
            'region' => $region,
            'weight' => $test_block['weight'],
            'id' => $test_block['id'],
        ]);
    }
    $this->drupalGet('');
    $test_content = $this->getSession()
        ->getPage()
        ->getContent();
    $controller = $this->container
        ->get('entity_type.manager')
        ->getStorage('block');
    foreach ($controller->loadMultiple() as $return_block) {
        $id = $return_block->id();
        if ($return_block_weight = $return_block->getWeight()) {
            $this->assertSame((int) $test_blocks[$id]['weight'], $return_block_weight, 'Block weight is set as "' . $return_block_weight . '" for ' . $id . ' block.');
            $position[$id] = strpos($test_content, Html::getClass('block-' . $test_blocks[$id]['id']));
        }
    }
    // Verify that blocks with different weight are rendered in the correct
    // order.
    $this->assertLessThan($position['stark_by'], $position['stark_powered']);
    // Verify that blocks with identical weight are rendered in alphabetical
    // order.
    $this->assertLessThan($position['stark_by'], $position['stark_drupal']);
}