function AssertMailTraitTest::testAssertMailTrait

Tests that the maintenance theme initializes the theme and its base themes.

File

core/tests/Drupal/KernelTests/Core/Test/AssertMailTraitTest.php, line 23

Class

AssertMailTraitTest

Tests \Drupal\Core\Test\AssertMailTrait works.

Namespace

Code

public function testAssertMailTrait() : void {
  /** @var \Drupal\Core\Mail\MailManagerInterface $mail_service */
  $mail_service = \Drupal::service('plugin.manager.mail');
  // Create an email.
  $subject = $this->randomString(64);
  $body = $this->randomString(128);
  $message = [
    'id' => 'drupal_mail_test',
    'headers' => [
      'Content-type' => 'text/html',
    ],
    'subject' => $subject,
    'to' => 'foobar@example.com',
    'body' => $body,
  ];
  // Before we send the email, \Drupal\Core\Test\AssertMailTrait::getMails()
  // should return an empty array.
  $captured_emails = $this->getMails();
  $this->assertCount(0, $captured_emails, 'The captured emails queue is empty.');
  // Send the email.
  $mail_service->getInstance([
    'module' => 'simpletest',
    'key' => 'drupal_mail_test',
  ])
    ->mail($message);
  // Ensure that there is one email in the captured emails array.
  $captured_emails = $this->getMails();
  $this->assertCount(1, $captured_emails, 'One email was captured.');
  // Asserts that the message fields have the pattern in it.
  $this->assertMailPattern('id', $message['id']);
  $this->assertMailPattern('subject', "^.{64}\$");
  $this->assertMailPattern('to', "[a-z]{6}@example\\.com\$");
  $this->assertMailPattern('body', "^.{128}\$");
  // Assert that the email was sent by iterating over the message properties
  // and ensuring that they are captured intact.
  foreach ($message as $field => $value) {
    $this->assertMail($field, $value, "The email was sent and the value for property {$field} is intact.");
  }
  // Send additional emails so more than one email is captured.
  for ($index = 0; $index < 5; $index++) {
    $message = [
      'id' => 'drupal_mail_test_' . $index,
      'headers' => [
        'Content-type' => 'text/html',
      ],
      'subject' => $this->randomString(64),
      'to' => $this->randomMachineName(32) . '@example.com',
      'body' => $this->randomString(512),
    ];
    $mail_service->getInstance([
      'module' => 'drupal_mail_test',
      'key' => $index,
    ])
      ->mail($message);
  }
  // There should now be 6 emails captured.
  $captured_emails = $this->getMails();
  $this->assertCount(6, $captured_emails, 'All emails were captured.');
  // Test different ways of getting filtered emails via
  // \Drupal\Core\Test\AssertMailTrait::getMails().
  $captured_emails = $this->getMails([
    'id' => 'drupal_mail_test',
  ]);
  $this->assertCount(1, $captured_emails, 'Only one email is returned when filtering by id.');
  $captured_emails = $this->getMails([
    'id' => 'drupal_mail_test',
    'subject' => $subject,
  ]);
  $this->assertCount(1, $captured_emails, 'Only one email is returned when filtering by id and subject.');
  $captured_emails = $this->getMails([
    'id' => 'drupal_mail_test',
    'subject' => $subject,
    'from' => 'this_was_not_used@example.com',
  ]);
  $this->assertCount(0, $captured_emails, 'No emails are returned when querying with an unused from address.');
  // Send the last email again, so we can confirm that
  // \Drupal\Core\Test\AssertMailTrait::getMails() filters correctly returns
  // all emails with a given property/value.
  $mail_service->getInstance([
    'module' => 'drupal_mail_test',
    'key' => $index,
  ])
    ->mail($message);
  $captured_emails = $this->getMails([
    'id' => 'drupal_mail_test_4',
  ]);
  $this->assertCount(2, $captured_emails, 'All emails with the same id are returned when filtering by id.');
}