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Slick Forums • View topic - Unit testing an EntitySystem

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PostPosted: Sun Aug 18, 2013 11:02 pm 
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Joined: Mon Jan 21, 2013 8:52 pm
Posts: 7
Been a while, but I'm back with a vengeance.

*cough*

So, I've been trying to unit test my EntitySystem objects, and I'm trying to figure out the best path to go about that. One of the things that I've been trying has been to mock out dependencies, but I'm not entirely sure how to inject my mock Mapper objects into the EntitySystem for usage. Ideally I'd like to depend on next to nothing in the framework while I'm testing this singular unit, but if that's not possible, I suppose I could get a bit more clever with the abstractions I'm using.

Totally open to suggestions, and yes, "That's difficult as ****" is an acceptable answer.

Thanks guys :D


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PostPosted: Mon Aug 19, 2013 7:10 am 
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Slick Zombie

Joined: Wed Apr 02, 2008 1:32 pm
Posts: 1340
Location: Italy
My question is: why do you need to do unit testing on an EntitySystem?
If you want to do a videogame, a working videogame is your test and do an unit test (for small projects, IMHO) is useless

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PostPosted: Mon Aug 19, 2013 1:47 pm 
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PostPosted: Mon Aug 19, 2013 4:04 pm 
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Joined: Sun Nov 04, 2012 7:01 pm
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Probably the simplest way would be to make the fields in your EntitySystem package private instead of private.

Another way may be to either create a TestWorld-class which extends World and overrides the initialize method or use a spy (I'm talking Mockito here: http://docs.mockito.googlecode.com/hg/l ... to.html#13) for the world and only change what initialize does that way. But you might have to do this for every system you test.

IMHO, neither solution has a 'this feels right' feeling to it.


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PostPosted: Mon Aug 26, 2013 8:28 pm 
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