Unit testing Google Places Autocompete API is not possible since creating fake response is not supported. Tried creating fake response with val placeResponse = Task<FindAutocompletePredictionsResponse>., unfortunately response creation is internal to API. Is there any way (or workaround) to accomplish this?

@Test
fun search_testSuccess()  {
    // AutoComplete response
    val placeResponse = Task<FindAutocompletePredictionsResponse>.
            
    val searchConstraints = SearchPlaceConstraints("Fake place")
    
    // AutoComplete request
    val request = FindAutocompletePredictionsRequest.builder()
            .setSessionToken(autocompleteSessionToken)
            .setQuery(searchConstraints.queryText)
            .build()
    
    // return provided placesResponse if `PlacesClient.findAutocompletePredictions()` is called
    coEvery { placesClient.findAutocompletePredictions(request) } returns placeResponse
    
    // Result of method being tested
    lateinit var result: Result<PlaceData<List<AutocompletePrediction>>>
    coJustRun { result = googlePlaceSearchRemoteDataSource.search(searchConstraints)}
    
    // Verify PlaceClient has been called 
    coVerify(exactly = 1) { placesClient.findAutocompletePredictions(request) }

    // Assert success
    assert(result is Result.Success)
}

Source: Android Questions