DisplayManagerTest.php in Examples for Developers 8

Namespace

Drupal\Tests\phpunit_example\Unit

File

phpunit_example/tests/src/Unit/DisplayManagerTest.php

<?php

namespace Drupal\Tests\phpunit_example\Unit;

use Drupal\Tests\UnitTestCase;
use Drupal\phpunit_example\DisplayManager;
use Drupal\phpunit_example\DisplayInfoInterface;

/**
 * DisplayManager unit test with doubles.
 *
 * @ingroup phpunit_example
 *
 * @group phpunit_example
 * @group examples
 */
class DisplayManagerTest extends UnitTestCase {

  /**
   * Test for DisplayManager's DisplayableItemInterface handling.
   *
   * This method sets up a mock DisplayableItemInterface object
   * and then feeds it to a DisplayManager object to test
   * the behavior of DisplayManager.
   *
   * See the inline comments for a thorough walk-through.
   */
  public function testSimpleMockDisplayManager() {

    // Setting up:
    // Get a mock object belonging to our desired interface.
    // Note that we have to fully qualify the domain name
    // for PHPUnit's benefit.
    $mock = $this
      ->getMockBuilder(DisplayInfoInterface::class)
      ->getMockForAbstractClass();

    // Here we're illustrating that the mock object belongs to
    // our interface.
    $this
      ->assertTrue($mock instanceof DisplayInfoInterface);

    // 'Program' our mock object to return a value for getDisplayName().
    // expects($this->any()) tells the mock to return this value any time
    // the method is called.
    $mock
      ->expects($this
      ->any())
      ->method('getDisplayName')
      ->will($this
      ->returnValue('the display name'));

    // Create a DisplayManager, the class we're actually testing here.
    $dm = new DisplayManager();

    // Give it the mocked info object.
    $dm
      ->addDisplayableItem($mock);

    // Assert that our DisplayManager has exactly one display object (our mock).
    $this
      ->assertEquals(1, $dm
      ->countDisplayableItems());

    // Assert that the DisplayManager can find our mocked info object.
    $this
      ->assertSame($mock, $dm
      ->item('the display name'));

    // Assert that the DisplayManager can't find an info object
    // that it shouldn't have.
    $this
      ->assertNull($dm
      ->item('nonexistant'));
  }

}

Classes

Name	Description
DisplayManagerTest	DisplayManager unit test with doubles.