我正在尝试在单元测试中使用KernetTestKase，但是我收到了“未找到”错误

I'm trying to follow some examples of using KernetTestCase for a Symfony 2 test that touches the DB.

I get this error:

Fatal error: Class 'Symfony\Bundle\FrameworkBundle\Test\KernelTestCase' not found in...

In my test files I have:

use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;

and

class AcmeContestTest extends KernelTestCase

However I still get the error above when running tests...

I figured out that Symfony version 2.3 which I'm using doesn't have KernelTestCase extracted out of WebTestCase as Symfony version 2.5 has...

for reference check out: https://github.com/symfony/symfony/tree/master/src/Symfony/Bundle/FrameworkBundle/Test