class NodeHelpTest

class NodeHelpTest extends BrowserTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'block',
    'node',
    'help',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * The name of the test node type to create.
   *
   * @var string
   */
  protected $testType;
  
  /**
   * The test 'node help' text to be checked.
   *
   * @var string
   */
  protected $testText;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    // Create user.
    $admin_user = $this->drupalCreateUser([
      'administer content types',
      'administer nodes',
      'bypass node access',
    ]);
    $this->drupalLogin($admin_user);
    $this->drupalPlaceBlock('help_block');
    $this->testType = 'type';
    $this->testText = 'Help text to find on node forms.';
    // Create content type.
    $this->drupalCreateContentType([
      'type' => $this->testType,
      'help' => $this->testText,
    ]);
  }
  
  /**
   * Verifies that help text appears on node add/edit forms.
   */
  public function testNodeShowHelpText() {
    // Check the node add form.
    $this->drupalGet('node/add/' . $this->testType);
    $this->assertSession()
      ->statusCodeEquals(200);
    $this->assertSession()
      ->pageTextContains($this->testText);
    // Create node and check the node edit form.
    $node = $this->drupalCreateNode([
      'type' => $this->testType,
    ]);
    $this->drupalGet('node/' . $node->id() . '/edit');
    $this->assertSession()
      ->statusCodeEquals(200);
    $this->assertSession()
      ->pageTextContains($this->testText);
  }

}