Tests for required dependencies?

[Kevin Burton]

Is there an easy way to require that your dependencies are met without actually having to call getInstance or have an instance of an object?

This should be easy since I can build a graph of the connections between Classes.

Some of my instances require complex init and external dependencies like Cassandra and ActiveMQ... I don't to have to require these in my unit tests because they are hefty.

I'd like to inject Session which is a Cassandra object bound to a given connection... but of course I would have to create that object manually.

Is there a cleaner way to do this?

This way I could have some basic tests for production bindings to make sure the bindings are complete and all dependencies met.

[Sam Berlin]

If you don't inject the injector anyway, wouldn't creating the injector (in Stage.TOOL if you want to prevent creating anything) cover this?

sam

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[Kevin Burton]

I don't follow.. I can't parse your sentence.  

[Sam Berlin]

So long as you have no code that has @Inject Injector (and then later calls .getInstance(Something.class), because Guice can't statically detect that), then calling Guice.createInjector(MyModule(), Stage.TOOL) should fail if you're missing dependencies.

sam

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[Kevin Burton]

AH!! Gotcha.  OK.  That rocks.. I'll look into that now.