example_share_random_seed_tests.kt

@Inject lateinit var seedProvider: SeedProvider

@Test
fun testSomething() {
  // Set the random seed after injection, but before the seed is provided (may require changes in the underlying controller, see note below).
  seedProvider.seed = 1234L
}

@Singleton
inner class SeedProvider @Inject constructor() {
  var seed: Long = 0L
}

@Module
class TestModule {
  @Provides
  @QuestionTrainingSeed
  // NOTE TO READER: This is an unscoped value, so each time the class containing it is constructed this will be called again.
  // Whether you can change the seed mid-test depends on whether the downstream components also can be recreated each time, or
  // if they are Singleton scoped.
  fun provideQuestionTrainingSeed(seedProvider: SeedProvider): Long {
    return seedProvider.seed
  }
}