Issue #2934904 by kiamlaluno, ridhimaabrol24, Kristen Pol: Replace protected...

  protected static $modules = ['system'];

  /**

   * A key/value store factory.

   *

   * @var \Drupal\Core\TempStore\SharedTempStoreFactory

   */

  protected $storeFactory;

  /**

   * The name of the key/value collection to set and retrieve.

   *

   * @var string

   */

  protected $collection;

  /**

   * An array of random stdClass objects.

   *

   * @var array

   * {@inheritdoc}

   */

  protected $objects = [];

  protected function setUp(): void {

    parent::setUp();

    // Install system tables to test the key/value storage without installing a

    // full Drupal environment.

    $this->installSchema('system', ['key_value_expire']);

    // Create several objects for testing.

    for ($i = 0; $i <= 3; $i++) {

      $this->objects[$i] = $this->randomObject();

    }

  }

  /**

   * Tests the SharedTempStore API.

   */

  public function testSharedTempStore() {

    // Create testing objects.

    $objects = [];

    for ($i = 0; $i <= 3; $i++) {

      $objects[$i] = $this->randomObject();

    }

    // Create a key/value collection.

    $database = Database::getConnection();

    $factory = new SharedTempStoreFactory(new KeyValueExpirableFactory(\Drupal::getContainer()), new DatabaseLockBackend($database), $this->container->get('request_stack'));

    for ($i = 0; $i <= 1; $i++) {

      // setIfNotExists() should be TRUE the first time (when $i is 0) and

      // FALSE the second time (when $i is 1).

      $this->assertEqual(!$i, $stores[0]->setIfNotExists($key, $this->objects[$i]));

      $this->assertEqual(!$i, $stores[0]->setIfNotExists($key, $objects[$i]));

      $metadata = $stores[0]->getMetadata($key);

      $this->assertEqual($users[0], $metadata->getOwnerId());

      $this->assertEquals($this->objects[0], $stores[0]->get($key));

      $this->assertEquals($objects[0], $stores[0]->get($key));

      // Another user should get the same result.

      $metadata = $stores[1]->getMetadata($key);

      $this->assertEqual($users[0], $metadata->getOwnerId());

      $this->assertEquals($this->objects[0], $stores[1]->get($key));

      $this->assertEquals($objects[0], $stores[1]->get($key));

    }

    // Remove the item and try to set it again.

    $stores[0]->delete($key);

    $stores[0]->setIfNotExists($key, $this->objects[1]);

    $stores[0]->setIfNotExists($key, $objects[1]);

    // This time it should succeed.

    $this->assertEquals($this->objects[1], $stores[0]->get($key));

    $this->assertEquals($objects[1], $stores[0]->get($key));

    // This user can update the object.

    $stores[0]->set($key, $this->objects[2]);

    $this->assertEquals($this->objects[2], $stores[0]->get($key));

    $stores[0]->set($key, $objects[2]);

    $this->assertEquals($objects[2], $stores[0]->get($key));

    // The object is the same when another user loads it.

    $this->assertEquals($this->objects[2], $stores[1]->get($key));

    $this->assertEquals($objects[2], $stores[1]->get($key));

    // This user should be allowed to get, update, delete.

    $this->assertInstanceOf(\stdClass::class, $stores[0]->getIfOwner($key));

    $this->assertTrue($stores[0]->setIfOwner($key, $this->objects[1]));

    $this->assertTrue($stores[0]->setIfOwner($key, $objects[1]));

    $this->assertTrue($stores[0]->deleteIfOwner($key));

    // Another user can update the object and become the owner.

    $stores[1]->set($key, $this->objects[3]);

    $this->assertEquals($this->objects[3], $stores[0]->get($key));

    $this->assertEquals($this->objects[3], $stores[1]->get($key));

    $stores[1]->set($key, $objects[3]);

    $this->assertEquals($objects[3], $stores[0]->get($key));

    $this->assertEquals($objects[3], $stores[1]->get($key));

    $metadata = $stores[1]->getMetadata($key);

    $this->assertEqual($users[1], $metadata->getOwnerId());

    // The first user should no longer be allowed to get, update, delete.

    $this->assertNull($stores[0]->getIfOwner($key));

    $this->assertFalse($stores[0]->setIfOwner($key, $this->objects[1]));

    $this->assertFalse($stores[0]->setIfOwner($key, $objects[1]));

    $this->assertFalse($stores[0]->deleteIfOwner($key));

    // Now manually expire the item (this is not exposed by the API) and then