markNodeAsRead example

// View the node.     $this->drupalGet('node/' . $nid);
    $this->assertCacheContext('user.roles:authenticated');
    // JavaScript present to record the node read.     $settings = $this->getDrupalSettings();
    $libraries = explode(',', $settings['ajaxPageState']['libraries']);
    $this->assertContains('history/mark-as-read', $libraries, 'history/mark-as-read library is present.');
    $this->assertEquals([$nid => TRUE], $settings['history']['nodesToMarkAsRead'], 'drupalSettings to mark node as read are present.');

    // Simulate JavaScript: perform HTTP request to mark node as read.     $response = $this->markNodeAsRead($nid);
    $this->assertEquals(200, $response->getStatusCode());
    $timestamp = Json::decode($response->getBody());
    $this->assertIsNumeric($timestamp);

    // Retrieve "last read" timestamp for test node, for the current user.     $response = $this->getNodeReadTimestamps([$nid]);
    $this->assertEquals(200, $response->getStatusCode());
    $json = Json::decode($response->getBody());
    $this->assertSame([1 => $timestamp], $json, 'The node has been read.');

    // Failing to specify node IDs for the first endpoint should return a 404.