function MailCaptureTest::testMailSend

Tests to see if the wrapper function is executed correctly.

File

core/tests/Drupal/FunctionalTests/MailCaptureTest.php, line 31

Class

MailCaptureTest

Tests the collection of emails during testing.

Namespace

Code

public function testMailSend() : void {
    // 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, drupalGetMails should return an empty array.
    $captured_emails = $this->drupalGetMails();
    $this->assertCount(0, $captured_emails, 'The captured emails queue is empty.');
    // Send the email.
    \Drupal::service('plugin.manager.mail')->getInstance([
        'module' => 'test',
        'key' => 'drupal_mail_test',
    ])
        ->mail($message);
    // Ensure that there is one email in the captured emails array.
    $captured_emails = $this->drupalGetMails();
    $this->assertCount(1, $captured_emails, 'One email was captured.');
    // Assert that the email was sent by iterating over the message properties
    // and ensuring that they are captured intact.
    foreach ($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),
        ];
        \Drupal::service('plugin.manager.mail')->getInstance([
            'module' => 'drupal_mail_test',
            'key' => $index,
        ])
            ->mail($message);
    }
    // There should now be 6 emails captured.
    $captured_emails = $this->drupalGetMails();
    $this->assertCount(6, $captured_emails, 'All emails were captured.');
    // Test different ways of getting filtered emails via drupalGetMails().
    $captured_emails = $this->drupalGetMails([
        'id' => 'drupal_mail_test',
    ]);
    $this->assertCount(1, $captured_emails, 'Only one email is returned when filtering by id.');
    $captured_emails = $this->drupalGetMails([
        '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->drupalGetMails([
        '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 the
    // drupalGetMails-filter correctly returns all emails with a given
    // property/value.
    \Drupal::service('plugin.manager.mail')->getInstance([
        'module' => 'drupal_mail_test',
        'key' => $index,
    ])
        ->mail($message);
    $captured_emails = $this->drupalGetMails([
        'id' => 'drupal_mail_test_4',
    ]);
    $this->assertCount(2, $captured_emails, 'All emails with the same id are returned when filtering by id.');
}