Mock-testing web services in Zend Framework

mock-testing-webservices.php

    public function testGetTracks()
    {   
        // Create mocks for the SoundCloud class for testing purposes
        $webservice = $this->getMockBuilder('\Soundcloud\Services\Soundcloud')
            ->setConstructorArgs(array(
                $this->config->soundcloud->clientId,
                $this->config->soundcloud->clientSecret))
            ->setMethods(array('get', 'setAccessToken'))
            ->getMock();
        $myInfo = file_get_contents(FIXTURE_PATH . '/soundcloud_my_info.txt');
        $playlists = file_get_contents(FIXTURE_PATH . '/soundcloud_playlists.txt');
        $tracks = file_get_contents(FIXTURE_PATH . '/soundcloud_tracks.txt');
        $inputs = array('me', 'playlists', 'tracks');
        $outputs = array($myInfo, $playlists, $tracks);
        $expectation = $webservice->expects($this->exactly(3))->method('get');
        $this->setMultipleMatching($expectation, $inputs, $outputs);
        $this->soundcloud = new \Soundcloud\Client(
            $webservice,
            $this->config->soundcloud->clientId,
            $this->config->soundcloud->clientSecret
        );
        $this->soundcloud->setAccessToken(
            '<user>', 
            '<password>',
            $this->config->soundcloud->tokenUrl
        );
        $myInfo = $this->soundcloud->getMyInfo();
        $mySoundcloudId = $myInfo['id'];

        $playlists = $this->soundcloud->getPlaylists($this->config->soundcloud->consumer_key);
        $this->assertTrue(count($playlists) > 0, 'Found one or more SoundCloud playlists');

        $tracks = $this->soundcloud->getAllTracks($mySoundcloudId);
        $this->assertTrue(count($tracks) > 0, 'Found one or more tracks from SoundCloud');
    }

    public function setMultipleMatching($expectation, array $inputs, array $outputs)
    {
        $testCase = $this;
        $callback = function() use ($inputs, $outputs, $testCase) {
            $args = func_get_args();
            $testCase->assertContains($args[0], $inputs);
            $index = array_search($args[0], $inputs);
            return $outputs[$index];
        };
        $expectation->will($this->returnCallback($callback));                                                                                                                                           
    }