Migrating to Dagger 2.12 and test module overrides

user_5190902 0
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I am migrating from Dagger 2.0.2 to Dagger 2.12 and plan to utilize dagger.android API.

My question is about migrating the test code. Currently, I have an AppModule and a TestAppModule which extends it and overrides some dependencies using @Override annotation. Here is an example:

@Module
public class TestAppModule extends AppModule {

    @Override
    public UserDao provideUserDao() {
        return mock(UserDao.class);
    }
}

Now with Dagger 2.12, if I try overriding a dependency in TestAppModule, an error is thrown: error: @Provides methods may not be overridden in modules.

What is the recommended way of overriding and mocking some of the dependencies in a TestModule while utilizing the rest of the dependencies defined in AppModule as is?

I can post a stripped down version of my Dagger setup if people think it's necessary.

dagger-2 dagger android
1 Answers

I ended up solving it by simply not annotating the TestAppModule with @Module. This achieves partial mocking. 

public class TestAppModule extends AppModule {

    @Override
    public UserDao provideUserDao() {
        return mock(UserDao.class);
    }
}
user_51909020
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