_resultMessages example

/** * {@inheritdoc} */
  protected $defaultTheme = 'starterkit_theme';

  /** * Tests batches triggered outside of form submission. */
  public function testBatchNoForm() {
    // Displaying the page triggers batch 1.     $this->drupalGet('batch-test/no-form');
    $this->assertBatchMessages($this->_resultMessages('batch_1'));
    $this->assertEquals($this->_resultStack('batch_1'), batch_test_stack(), 'Execution order was correct.');
    $this->assertSession()->pageTextContains('Redirection successful.');
  }

  /** * Tests batches that redirect in the batch finished callback. */
  public function testBatchRedirectFinishedCallback() {
    // Displaying the page triggers batch 1.     $this->drupalGet('batch-test/finish-redirect');
    $this->assertBatchMessages($this->_resultMessages('batch_1'));