使用 Composer 安装 PHPUNIT

我在Symfony 2上有项目，我想在Windows 7上使用PHPUNIT。

On githut phpunit is:

Composer

Simply add a dependency on phpunit/phpunit to your project's composer.json file if you use Composer to manage the dependencies of your project. Here is a minimal example of a composer.json file that just defines a development-time dependency on PHPUnit 3.7:

{
    "require-dev": {
        "phpunit/phpunit": "3.7.*"
    }
}
For a system-wide installation via Composer, you can run:

composer global require 'phpunit/phpunit=3.7.*'
Make sure you have ~/.composer/vendor/bin/ in your path.

首先，我使用系统范围的安装，但我不知道何时安装。接下来，我添加到我的 composer.json require-dev。这在C：/wamp/www/myproject/vendor/symfony中安装了phpunit。接下来我尝试命令：

 composer install --dev

我不能使用phpunit。在cmd.exe我输入“phpunit”，我有错误：

'phpunit' is not recognized as an internal or external command operable program or batch file

我如何使用 phpunit？我有Windows 7，Wamp服务器和php 5.4.12。