spl_autoload_register, SessionHandlerInterface和PHPUnit的问题

我有一个非常简单的类的小单元测试。下面是我要测试的类:

<?php
namespace MyApp'sys;
class Auth
{
    // ...
    public static function getInstance()
    {
    if(!isset(self::$_instance))
        self::$_instance = new Auth();
    return self::$_instance;
    }
    public function authenticate($sMethod, $sData, $sAuth)
    {
        // ...
        return $this->authSession();
    }
    public function authSession()
    {
        // ...
        $oHandler = new SessionHandler();
    }
}

下面是SessionHandler类:

<?php
namespace MyApp'sys;
class SessionHandler implements 'SessionHandlerInterface
{
    public function open($sSavePath, $sSessionId)
    {
        // ...
    }
    public function close()
    {
        // ...
    }
    public function read($sSessionId)
    {
        // ...
    }
    public function write($sSessionId, $sSessionData)
    {
        // ...
    }
    public function destroy($sSessionId)
    {
        // ...
    }
    public function gc($iMaxLifetime)
    {
        // ...
    }
}

下面是一个简单的单元测试:

<?php
namespace Test'MyApp'sys;
use PHPUnit_Framework_TestCase;
class AuthTest extends PHPUnit_Framework_TestCase
{
    protected function setUp()
    {
        parent::setUp();
    }
    protected function tearDown()
    {
        parent::tearDown();
    }
    public function testGetInstance()
    {
        $oAuth = 'MyApp'sys'Auth::getInstance();
        $this->assertInstanceOf(''MyApp'sys'Auth', $oAuth);
        return $oAuth;
    }
    /**
     * @depends testGetInstance
     */
    public function testAuthenticate('MyApp'sys'Auth $oAuth)
    {
        $res = $oAuth->authenticate(null, null, null);
    }
}

我有以下phpunit.xml文件:

<?xml version="1.0" encoding="UTF-8"?>
<phpunit
    bootstrap="bootstrap.php"
    convertErrorsToExceptions="true"
    convertNoticesToExceptions="true"
    convertWarningsToExceptions="true"
    stopOnError="true"
    stopOnFailure="true"
    strict="false"
    verbose="true">
    <testsuites>
        <testsuite name="Authentication">
            <directory suffix="Test.php">
                ./MyApp/sys/
            </directory>
        </testsuite>
    </testsuites>
</phpunit>

…以及下面的bootstrap.php文件:

<?php
define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../'));
define('APPLICATION_TEST_PATH', realpath(dirname(__FILE__)));
spl_autoload_register(function($sClas) {
    $nClass = str_replace("''", "/", $sClas);
    require_once APPLICATION_PATH . '/' . $nClass . ".php";
});

目录结构如下:

- MyProject/
   - MyApp/
      - sys/
         . Auth.php
         . SessionHandler.php
   - Test/
      - MyApp/
         - sys/
            . AuthTest.php
      . bootstrap.php
      . phpunit.xml

这是我尝试从命令行运行这个小单元测试的方式(以及我得到的结果):

# phpunit MyApp/sys/AuthTest.php 
PHPUnit 3.7.19 by Sebastian Bergmann.
Configuration read from /Users/pmpro/Code/Snevens/MyProject/Tests/phpunit.xml
.PHP Fatal error:  {closure}(): Failed opening required '/Users/pmpro/Code/Snevens/MyProject/SessionHandlerInterface.php' (include_path='.:/usr/share/pear') in /Users/pmpro/Code/Snevens/MyProject/Tests/bootstrap.php on line 7
Fatal error: {closure}(): Failed opening required '/Users/pmpro/Code/Snevens/MyProject/SessionHandlerInterface.php' (include_path='.:/usr/share/pear') in /Users/pmpro/Code/Snevens/MyProject/Tests/bootstrap.php on line 7

我认为这将是注册自动加载函数的问题，所以我决定跳过类自动加载，以防它是SessionHandlerInterface，只是为了看看会发生什么:

spl_autoload_register(function($sClas) {
    if("SessionHandlerInterface" == $sClas)
        return;
    $nClass = str_replace("''", "/", $sClas);
    require_once APPLICATION_PATH . '/' . $nClass . ".php";
});

，结果如下:

# phpunit MyApp/sys/AuthTest.php 
PHPUnit 3.7.19 by Sebastian Bergmann.
Configuration read from /Users/pmpro/Code/Snevens/MyProject/Tests/phpunit.xml
.PHP Fatal error:  Interface 'SessionHandlerInterface' not found in /Users/pmpro/Code/Snevens/MyProject/MyApp/sys/SessionHandler.php on line 9
Fatal error: Interface 'SessionHandlerInterface' not found in /Users/pmpro/Code/Snevens/MyProject/MyApp/sys/SessionHandler.php on line 9

如果我直接从命令行调用SessionHandler.php，它不会返回错误:

# php SessionHandler.php
(returns nothing)

我做错了什么或者我错过了什么?

这只发生在SessionHandlerInterface中。我试着只运行testGetInstance，使Auth类实现ArrayAccess，例如，它根本没有抱怨。如果我让Auth类实现SessionHandlerInterface，它会立即报错。

我正在运行PHP 5.4.13和PHP Unit 3.7.19