I have to build an app with sqlite usage. Now I want to write my unit tests. These unit tests should test my class SQLiteBridge
. SQLiteBridge
provides DAOs for every child class of Model.
Now I got the problem that I need a context to create my SQLiteBridge
. SQLiteBridge
creates and handles a SQLite database on the system..
Where to get the Context-Object from?
My setup is like here (so I'm using Junit4 [thanks god]): http://tools.android.com/tech-docs/unit-testing-support
EDIT: I hope there is a way like the old AndroidTestCase
to extend without losing Junit4. :)
As described here: https://code.google.com/p/android-test-kit/wiki/AndroidJUnitRunnerUserGuide Use the InstrumentationRegistry to obtain the context.
However if you call InstrumentationRegistry.getContext()
directly you may get an exception opening your database. I believe this is because the context returned by getContext() points to the instrumentation's context rather than that of your application / unit test. Instead use InstrumentationRegistry.getInstrumentation().getTargetContext()
For example:
@RunWith(AndroidJUnit4.class)
public class SqliteTest {
Context mMockContext;
@Before
public void setUp() {
mMockContext = new RenamingDelegatingContext(InstrumentationRegistry.getTargetContext(), "test_");
}
}
The RenamingDelegatingContext simply prefixes the file/database names with test_ to prevent you from overwriting data that you may have in the same simulator.