class EventsExampleTest

class EventsExampleTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'events_example',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $profile = 'minimal';
    
    /**
     * Test the output of the example page.
     */
    public function testEventsExample() {
        // Test that the main page for the example is accessible.
        $events_example_form = Url::fromRoute('events_example.description');
        $this->drupalGet($events_example_form);
        $this->assertSession()
            ->statusCodeEquals(200);
        // Verify the page contains the required form fields.
        $this->assertSession()
            ->fieldExists('incident_type');
        $this->assertSession()
            ->fieldExists('incident');
        // Submit the form with an incident type of 'stolen_princess'. This does a
        // couple of things. Fist of all, it ensures that our code in
        // EventsExampleForm::submitForm() that dispatches events works. If it did
        // not work, no event would be dispatched, and the message below would never
        // get displayed. Secondly, it tests that our
        // EventsExampleSubscriber::notifyMario() event subscriber is triggered for
        // incidents of the type 'stolen_princess'.
        $values = [
            'incident_type' => 'stolen_princess',
            'incident' => $this->randomString(),
        ];
        $this->drupalPostForm($events_example_form, $values, 'Submit');
        $this->assertSession()
            ->pageTextContains('Mario has been alerted. Thank you.');
        // Fill out the form again, this time testing that the
        // EventsExampleSubscriber::notifyBatman() subscriber is working.
        $values = [
            'incident_type' => 'joker',
            'incident' => $this->randomString(),
        ];
        $this->drupalPostForm($events_example_form, $values, 'Submit');
        $this->assertSession()
            ->pageTextContains('Batman has been alerted. Thank you.');
        // Fill out the form again, this time testing that our default handler
        // catches all the remaining values.
        $values = [
            'incident_type' => 'cat',
            'incident' => $this->randomString(),
        ];
        $this->drupalPostForm($events_example_form, $values, 'Submit');
        $this->assertSession()
            ->pageTextContains('notifyDefault()');
    }

}