TestCase needs component manager

[Upayavira]

I'm writing a test case for my PreparedVariableResolver. My first use of 
ExcaliburTestCase.

I need a component manager, and the fact that ExcaliburTestCase has a 
protected member called manager, I would expect it to be set up for me. 
However, it isn't - I'm finding it to be null.

Making my test case implement Composable didn't achieve anything.

Therefore, how do I go about getting hold of one?

Regards, Upayavira