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Edit File: ObserverTest.php

<?php
/**
 * Unit tests for HTTP_Request2 package
 *
 * PHP version 5
 *
 * LICENSE
 *
 * This source file is subject to BSD 3-Clause License that is bundled
 * with this package in the file LICENSE and available at the URL
 * https://raw.github.com/pear/HTTP_Request2/trunk/docs/LICENSE
 *
 * @category  HTTP
 * @package   HTTP_Request2
 * @author    Alexey Borzov <avb@php.net>
 * @copyright 2008-2014 Alexey Borzov <avb@php.net>
 * @license   http://opensource.org/licenses/BSD-3-Clause BSD 3-Clause License
 * @link      http://pear.php.net/package/HTTP_Request2
 */

/** Sets up includes */
require_once dirname(__FILE__) . '/TestHelper.php';

/**
 * Class representing a HTTP request
 */
require_once 'HTTP/Request2.php';

/**
 * Mock observer
 */
class HTTP_Request2_MockObserver implements SplObserver
{
    public $calls = 0;

public $event;

public function update (SplSubject $subject)
    {
        $this->calls++;
        $this->event = $subject->getLastEvent();
    }
}

/**
 * Unit test for subject-observer pattern implementation in HTTP_Request2
 */
class HTTP_Request2_ObserverTest extends PHPUnit_Framework_TestCase
{
    public function testSetLastEvent()
    {
        $request  = new HTTP_Request2();
        $observer = new HTTP_Request2_MockObserver();
        $request->attach($observer);

$request->setLastEvent('foo', 'bar');
        $this->assertEquals(1, $observer->calls);
        $this->assertEquals(array('name' => 'foo', 'data' => 'bar'), $observer->event);

$request->setLastEvent('baz');
        $this->assertEquals(2, $observer->calls);
        $this->assertEquals(array('name' => 'baz', 'data' => null), $observer->event);
    }

public function testAttachOnlyOnce()
    {
        $request   = new HTTP_Request2();
        $observer  = new HTTP_Request2_MockObserver();
        $observer2 = new HTTP_Request2_MockObserver();
        $request->attach($observer);
        $request->attach($observer2);
        $request->attach($observer);

$request->setLastEvent('event', 'data');
        $this->assertEquals(1, $observer->calls);
        $this->assertEquals(1, $observer2->calls);
    }

public function testDetach()
    {
        $request   = new HTTP_Request2();
        $observer  = new HTTP_Request2_MockObserver();
        $observer2 = new HTTP_Request2_MockObserver();

$request->attach($observer);
        $request->detach($observer2); // should not be a error
        $request->setLastEvent('first');

$request->detach($observer);
        $request->setLastEvent('second');
        $this->assertEquals(1, $observer->calls);
        $this->assertEquals(array('name' => 'first', 'data' => null), $observer->event);
    }
}
?>