cakephp ControllerTest

我是一个菜鸟,试图为Cakephp书的Blog Tutorial编写一个ControllerTest.
完成这项任务后,我找到了一个很好的例子,我可以适应.
这本书提供了以下示例：
http://book.cakephp.org/2.0/en/development/testing.html#testing-controllers
所以我在/ app / Controller /中创建了一个ArticlesController.php文件,在/ app / Test / Case / Controller /中创建了一个ArticlesControllerTest.php

我的ArticlesController.php的内容是：

<?php
class ArticlesController extends ControllerTestCase {
//public $fixtures = array('app.article');

public function testIndex() {
    $result = $this->testAction('/articles/index');
    debug($result);
}

public function testIndexShort() {
    $result = $this->testAction('/articles/index/short');
    debug($result);
}

public function testIndexShortGetRenderedHtml() {
    $result = $this->testAction(
        '/articles/index/short',array('return' => 'contents')
    );
    debug($result);
}

public function testIndexShortGetViewVars() {
    $result = $this->testAction(
        '/articles/index/short',array('return' => 'vars')
    );
    debug($result);
}

public function testIndexPostData() {
    $data = array(
        'Article' => array(
            'user_id' => 1,'published' => 1,'slug' => 'new-article','title' => 'New Article','body' => 'New Body'
        )
    );
    $result = $this->testAction(
        '/articles/index',array('data' => $data,'method' => 'post')
    );
    debug($result);
}

}

而我的ArticlesController.php的内容是：

<?php
class ArticlesControllerTest extends ControllerTestCase {
    public $fixtures = array('app.article');

    public function testIndex() {
        $result = $this->testAction('/articles/index');
        debug($result);
    }

    public function testIndexShort() {
        $result = $this->testAction('/articles/index/short');
        debug($result);
    }

    public function testIndexShortGetRenderedHtml() {
        $result = $this->testAction(
           '/articles/index/short',array('return' => 'contents')
        );
        debug($result);
    }

    public function testIndexShortGetViewVars() {
        $result = $this->testAction(
            '/articles/index/short',array('return' => 'vars')
        );
        debug($result);
    }

    public function testIndexPostData() {
        $data = array(
            'Article' => array(
                'user_id' => 1,'body' => 'New Body'
            )
        );
        $result = $this->testAction(
            '/articles/index','method' => 'post')
        );
        debug($result);
    }
}

我从书中复制了这些代码,并对夹具进行了评估.
运行测试给了我以下错误：

错误：找不到类’AppController’
文件：/Applications/MAMP/htdocs/cake/app/Controller/ArticlesController.php
行：3

大法错了？
Thxs！

App::uses('AppController','Controller');