Using WP_Mock with PhpSpec

readme.md

Check out the full article on channeleaton.com

phpspec-setup.php

<?php

class TodoSpec extends ObjectBehavior {
  public function let() {
    \WP_Mock::setUp();
  }
  
  public function letGo() {
    \WP_Mock::tearDown();
  }
}

testing-comparison.php

<?php

/**
 * A test written with PHPUnit
 */
class TodoTest extends TestCase {
  public function testCanCompleteTodo() {
    $todo = new Todo('Write a blog post');
    $todo->markCompleted();
    $this->assertTrue($todo->isComplete());
  }
}

/**
 * The same test in PhpSpec
 */
class TodoSpec extends ObjectBehavior {
  public function let() {
    $this->beConstructedWith('Write a blog post');
  }
  
  public function it_can_complete_todo() {
    $this->markCompleted();
    $this->isComplete()->shouldReturn(true);
  }
}

todo-spec.php

<?php

class Todo {
  private $title;
  
  public function __construct( $title ) {
    $this->title = $title;
  }
  
  public function save() {
    return wp_insert_post(['post_title' => $this->title, 'post_status' => 'publish'], true);
  }
}

class TodoSpec extends ObjectBehavior {
  public function let() {
    \WP_Mock::setUp();
  }
  
  public function letGo() {
    \WP_Mock::tearDown();
  }
  
  public function it_can_create_todo() {
    /**
     * We are expecting that the `save()` method will call `wp_insert_post()`.
     * If `wp_insert_post()` wasn't actually called an error would be thrown
     * during the test.
     */
    \WP_Mock::wpFunction( 'wp_insert_post', array(
      'args' => [['post_title' => 'Write a blog post', 'post_status' => 'publish'], true],
      'times' => 1,
      'return' => 42
    ) );
    
    // Now run Todo::save() and make sure it returns the post (todo) ID
    $this->save()->shouldReturn(42);
  }
}