A few examples how to use PHPUnit. Covering Mock Objects, setUp Method, MockBuilder, @ExpectedException, @dataProvider

phpunit_sample.php

<?php

namespace Silpion\ExampleBundle\Tests\Listener\Serialization;

use Silpion\ExampleBundle\Entity\TextBlock;
use Silpion\ExampleBundle\Listener\Serialization\SerializationListener;

class SerializationListenerTest extends \PHPUnit_Framework_TestCase
{
  /** @var  SerializationListener */
  protected $listener;

  /** @var  \PHPUnit_Framework_MockObject_MockObject */
  protected $visitorMock;

  protected function setUp() {
    $this->visitorMock = $this->getMockBuilder('\JMS\Serializer\JsonSerializationVisitor')
                              ->disableOriginalConstructor()
                              ->setMethods(array('addData'))
                              ->getMock();

    $this->listener = new SerializationListener($this->solverMock);
  }

  public function testGetSubscribedEvents() {
    $this->assertEquals(
         array(
           array(
             'event'  => 'serializer.post_serialize',
             'class'  => 'Silpion\ExampleBundle\Entity\TextBlock',
             'method' => 'onPostSerialize'
           ),
         ),
         $this->listener->getSubscribedEvents()
    );
  }

  public function testOnPostSerialize() {
    $textBlock = new TextBlock();
    $textBlock->setLanguage('de', 'Foo');

    $this->visitorMock->expects($this->once())
                      ->method('addData')
                      ->with('translations', array(42));

    $this->listener->onPostSerialize($this->visitorMock);
  }
  
  /**
   * @expectedException \InvalidArgumentException
   * @expectedExceptionMessage Invalid Foo
   */
  public function testInvalidFoo() {
    new SerializationListener(null);
  }
  
  /**
   * This method will use translationsData() to get the Arguments for this test Method.
   * 
   * @dataProvider translationsData
   */
  public function testSolveTranslation($langs, $input, $expected) {
    $solver = new TranslationsSolver($langs);
    $translations = $solver->calculateTranslations($input);
    $this->assertEquals($expected, $translations);
  }

  public function translationsData() {
    return array(
      // One language, no fallback.
      array('arg1', 'arg2', 'arg3'),
    );
  }
  
}