Symfony2 Unit Testing Compiler Passes

Question

Does anyone have any advice for how to unit test a Symfony2 CompilerPassInterface::process() instance?

In particular, the ones I want to test generally deal with tagged items, adding method calls to a "manager" service.

igorw · Accepted Answer · 2013-02-25 13:13:32Z

13

If you want to test it in isolation, you'll have to mock the ContainerBuilder, and mock any service definition it returns.

That's usually quite annoying though. So I would tend to write an integration test instead. And in fact, that's what most of the compiler pass tests of symfony core do as well.

You would:

Create an instance of ContainerBuilder
Register some stub services
Create the compiler pass
Call $pass->process($container);
Assert that the pass did its thing correctly

For an example of this, take a look at the RemoveUnusedDefinitionsPassTest.

answered Feb 25, 2013 at 13:13

igorw

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1 Comment

samanime Over a year ago

Perfect, thanks. I think testing it in true isolation would be ridiculously overkill, so integration testing is perfect.

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