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diff --git a/vendor/drush/drush/tests/QueueTest.php b/vendor/drush/drush/tests/QueueTest.php
new file mode 100644
index 000000000..dc6e33cd1
--- /dev/null
+++ b/vendor/drush/drush/tests/QueueTest.php
@@ -0,0 +1,105 @@
+<?php
+
+namespace Unish;
+
+use Webmozart\PathUtil\Path;
+
+/**
+ * @group commands
+ */
+class QueueCase extends CommandUnishTestCase
+{
+    use TestModuleHelperTrait;
+
+    public function testQueue()
+    {
+        $expected = 'aggregator_feeds,%items,"Drupal\Core\Queue\DatabaseQueue"';
+        $sites = $this->setUpDrupal(1, true);
+
+        // Enable aggregator since it declares a queue.
+        $this->drush('pm-enable', ['aggregator']);
+
+        $this->drush('queue-list');
+        $output = $this->getOutput();
+        $this->assertContains('aggregator_feeds', $output, 'Queue list shows the declared queue.');
+
+        // We need user to own to the feed.
+        $this->drush('user-create', ['example'], ['password' => 'password', 'mail' => "example@example.com"]);
+        $this->drush('php-script', ['queue_script'], ['script-path' => __DIR__ . '/resources']);
+        $this->drush('queue-list', [], ['format' => 'csv']);
+        $output = $this->getOutputAsList();
+        $this->assertEquals(str_replace('%items', 1, $expected), array_pop($output), 'Item was successfully added to the queue.');
+
+        $this->drush('queue-run', ['aggregator_feeds']);
+        $this->drush('queue-list', [], ['format' => 'csv']);
+        $output = $this->getOutputAsList();
+        $this->assertEquals(str_replace('%items', 0, $expected), array_pop($output), 'Queue item processed.');
+    }
+
+  /**
+   * Tests the queue-delete command.
+   */
+    public function testQueueDelete()
+    {
+        $expected = 'aggregator_feeds,%items,"Drupal\Core\Queue\DatabaseQueue"';
+
+        $sites = $this->setUpDrupal(1, true);
+
+        // Enable aggregator since it declares a queue.
+        $this->drush('pm-enable', ['aggregator']);
+
+        // Add another item to the queue and make sure it was deleted.
+        $this->drush('php-script', ['queue_script'], ['script-path' => __DIR__ . '/resources']);
+        $this->drush('queue-list', [], ['format' => 'csv']);
+        $output = $this->getOutputAsList();
+        $this->assertEquals(str_replace('%items', 1, $expected), array_pop($output), 'Item was successfully added to the queue.');
+
+        $this->drush('queue-delete', ['aggregator_feeds']);
+
+        $this->drush('queue-list', [], ['format' => 'csv']);
+        $output = $this->getOutputAsList();
+        $this->assertEquals(str_replace('%items', 0, $expected), array_pop($output), 'Queue was successfully deleted.');
+    }
+
+  /**
+   * Tests the RequeueException.
+   */
+    public function testRequeueException()
+    {
+        $sites = $this->setUpDrupal(1, true);
+
+        // Copy the 'woot' module over to the Drupal site we just set up.
+        $this->setupModulesForTests(['woot'], Path::join(__DIR__, 'resources/modules/d8'));
+
+        // Enable woot module, which contains a queue worker that throws a
+        // RequeueException.
+        $this->drush('pm-enable', ['woot'], [], null, null, self::EXIT_SUCCESS);
+
+        // Add an item to the queue.
+        $this->drush('php-script', ['requeue_script'], ['script-path' => __DIR__ . '/resources']);
+
+        // Check that the queue exists and it has one item in it.
+        $expected = 'woot_requeue_exception,%items,"Drupal\Core\Queue\DatabaseQueue"';
+        $this->drush('queue-list', [], ['format' => 'csv']);
+        $output = $this->getOutputAsList();
+        $this->assertEquals(str_replace('%items', 1, $expected), array_pop($output), 'Item was successfully added to the queue.');
+
+        // Process the queue.
+        $this->drush('queue-run', ['woot_requeue_exception']);
+
+        // Check that the item was processed after being requeued once.
+        // Here is the detailed workflow of what the above command did.
+        // 1. Drush calls drush queue-run woot_requeue_exception.
+        // 2. Drush claims the item. The worker sets a state variable (see below)
+        // and throws the RequeueException.
+        // 3. Drush catches the exception and puts it back in the queue.
+        // 4. Drush claims the next item, which is the one that we just requeued.
+        // 5. The worker finds the state variable, so it does not throw the
+        // RequeueException this time (see below).
+        // 6. Drush removes the item from the queue.
+        // 7. Command finishes. The queue is empty.
+        $this->drush('queue-list', [], ['format' => 'csv']);
+        $output = $this->getOutputAsList();
+        $this->assertEquals(str_replace('%items', 0, $expected), array_pop($output), 'Queue item processed after being requeued.');
+    }
+}