database - Android Unit Tests Requiring Context

Question

I am writing my first Android database backend and I'm struggling to unit test the creation of my database.

Currently the problem I am encountering is obtaining a valid Context object to pass to my implementation of SQLiteOpenHelper. Is there a way to get a Context object in a class extending TestCase? The solution I have thought of is to instantiate an Activity in the setup method of my TestCase and then assigning the Context of that Activity to a field variable which my test methods can access...but it seems like there should be an easier way.

Answer 1

You can use InstrumentationRegistry methods to get a Context:

InstrumentationRegistry.getTargetContext() - provides the application Context of the target application.

InstrumentationRegistry.getContext() - provides the Context of this Instrumentation’s package.

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For AndroidX use InstrumentationRegistry.getInstrumentation().getTargetContext() or InstrumentationRegistry.getInstrumentation().getContext().

New API for AndroidX: ApplicationProvider.getApplicationContext()