--- /dev/null
+<?php
+
+namespace Drupal\Tests\block\Kernel;
+
+use Drupal\block\Entity\Block;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\simpletest\BlockCreationTrait;
+
+/**
+ * Tests block_rebuild().
+ *
+ * @group block
+ */
+class BlockRebuildTest extends KernelTestBase {
+
+ use BlockCreationTrait;
+
+ /**
+ * {@inheritdoc}
+ */
+ public static $modules = ['block', 'system'];
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ $this->container->get('theme_installer')->install(['stable', 'classy']);
+ $this->container->get('config.factory')->getEditable('system.theme')->set('default', 'classy')->save();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function setUpBeforeClass() {
+ parent::setUpBeforeClass();
+
+ // @todo Once block_rebuild() is refactored to auto-loadable code, remove
+ // this require statement.
+ require_once static::getDrupalRoot() . '/core/modules/block/block.module';
+ }
+
+ /**
+ * @covers ::block_rebuild
+ */
+ public function testRebuildNoBlocks() {
+ block_rebuild();
+ $messages = drupal_get_messages();
+ $this->assertEquals([], $messages);
+ }
+
+ /**
+ * @covers ::block_rebuild
+ */
+ public function testRebuildNoInvalidBlocks() {
+ $this->placeBlock('system_powered_by_block', ['region' => 'content']);
+
+ block_rebuild();
+ $messages = drupal_get_messages();
+ $this->assertEquals([], $messages);
+ }
+
+ /**
+ * @covers ::block_rebuild
+ */
+ public function testRebuildInvalidBlocks() {
+ $this->placeBlock('system_powered_by_block', ['region' => 'content']);
+ $block1 = $this->placeBlock('system_powered_by_block');
+ $block2 = $this->placeBlock('system_powered_by_block');
+ $block2->disable()->save();
+ // Use the config API directly to bypass Block::preSave().
+ \Drupal::configFactory()->getEditable('block.block.' . $block1->id())->set('region', 'INVALID')->save();
+ \Drupal::configFactory()->getEditable('block.block.' . $block2->id())->set('region', 'INVALID')->save();
+
+ // Reload block entities.
+ $block1 = Block::load($block1->id());
+ $block2 = Block::load($block2->id());
+
+ $this->assertSame('INVALID', $block1->getRegion());
+ $this->assertTrue($block1->status());
+ $this->assertSame('INVALID', $block2->getRegion());
+ $this->assertFalse($block2->status());
+
+ block_rebuild();
+
+ // Reload block entities.
+ $block1 = Block::load($block1->id());
+ $block2 = Block::load($block2->id());
+
+ $messages = drupal_get_messages();
+ $expected = ['warning' => [new TranslatableMarkup('The block %info was assigned to the invalid region %region and has been disabled.', ['%info' => $block1->id(), '%region' => 'INVALID'])]];
+ $this->assertEquals($expected, $messages);
+
+ $default_region = system_default_region('classy');
+ $this->assertSame($default_region, $block1->getRegion());
+ $this->assertFalse($block1->status());
+ $this->assertSame($default_region, $block2->getRegion());
+ $this->assertFalse($block2->status());
+ }
+
+}