EmailExampleTest.php

<?php

namespace Drupal\Tests\email_example\Functional;

use Drupal\Core\Test\AssertMailTrait;
use Drupal\Tests\examples\Functional\ExamplesBrowserTestBase;

/**
 * Tests for the email_example module.
 *
 * @ingroup email_example
 *
 * @group email_example
 * @group examples
 */
class EmailExampleTest extends ExamplesBrowserTestBase {
    use AssertMailTrait;
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'email_example',
    ];
    
    /**
     * The installation profile to use with this test.
     *
     * @var string
     */
    protected $profile = 'minimal';
    
    /**
     * Test our new email form.
     *
     * Tests for the following:
     *
     * - A link to the email_example in the Tools menu.
     * - That you can successfully access the email_example page.
     */
    public function testEmailExampleBasic() {
        $assert = $this->assertSession();
        // Test for a link to the email_example in the Tools menu.
        $this->drupalGet('');
        $assert->statusCodeEquals(200);
        $assert->linkByHrefExists('examples/email-example');
        // Verify if we can successfully access the email_example page.
        $this->drupalGet('examples/email-example');
        $assert->statusCodeEquals(200);
        // Verifiy email form has email & message fields.
        $assert->fieldExists('edit-email');
        $assert->fieldExists('edit-message');
        // Verifiy email form is submitted.
        $edit = [
            'email' => 'example@example.com',
            'message' => 'test',
        ];
        $this->drupalGet('examples/email-example');
        $this->submitForm($edit, 'Submit');
        $assert->statusCodeEquals(200);
        // Verifiy comfirmation page.
        $assert->pageTextContains('Your message has been sent.');
        $this->assertMailString('to', $edit['email'], 1);
        // Verifiy correct email recieved.
        $from = $this->config('system.site')
            ->get('mail');
        $this->assertMailString('subject', "E-mail sent from {$from}", 1);
        $this->assertMailString('body', $edit['message'], 1);
        $this->assertMailString('body', "\n--\nMail altered by email_example module.", 1);
    }

}