我已经成功安装PHPunit.

Package            Version State
File_Iterator      1.3.1   stable
PHPUnit            3.6.10  stable
PHPUnit_MockObject 1.1.1   stable
PHP_CodeCoverage   1.1.2   stable
PHP_Invoker        1.1.0   stable
PHP_Timer          1.0.2   stable
PHP_TokenStream    1.1.3   stable
Text_Template      1.1.1   stable

然而每当我从shell运行PHPunit命令,我得到以下错误：

PHP Warning: require_once(File/Iterator/Autoload.PHP): Failed to open
stream: No such file or directory in
/usr/share/pear/PHPUnit/Autoload.PHP on line 45
PHP Fatal error:
require_once(): Failed opening required ‘File/Iterator/Autoload.PHP’
(include_path=’.:’) in /usr/share/pear/PHPUnit/Autoload.PHP on line 45

有谁知道如何解决问题的线索？