LeaguesViewModelTest.kt

package com.example.myleague.apitesting

import android.util.Log
import androidx.lifecycle.MutableLiveData
import com.example.myleague.model.league.LeagueDetailResponse
import com.example.myleague.model.league.LeaguesDetailModel
import com.example.myleague.model.league.LeaguesResponse
import com.example.myleague.network.ApiService
import org.junit.Before

import org.junit.Test
import org.mockito.Mock
import org.mockito.Mockito
import org.mockito.MockitoAnnotations
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response

class LeaguesViewModelTest {

    @Mock
    private val leagusListData = MutableLiveData<ArrayList<LeaguesDetailModel>>()
    @Mock
    private val listItems = ArrayList<LeaguesDetailModel>()

    @Before
    fun setUp(){
        MockitoAnnotations.initMocks(this)
        Mockito.`when`(setLeaguesList()).thenReturn(getData())
    }

    @Test
    fun setLeaguesList() {
        ApiService().getApi().getLeagues().enqueue(object : Callback<LeaguesResponse> {
            override fun onFailure(call: Call<LeaguesResponse>, t: Throwable) {
                Log.i("FAILED GET ", "LIST OF LEAGUES ERROR : ${t} ")
            }

            override fun onResponse(
                call: Call<LeaguesResponse>,
                response: Response<LeaguesResponse>
            ) {
                response.body()?.leagues?.let {
                   getLeageuBadge()
                }
                leagusListData.postValue(listItems)
            }

        })
    }


    @Test
    fun getLeageuBadge() {

        ApiService().getApi().getLeaguesById("4346").enqueue(object : Callback<LeagueDetailResponse> {
            override fun onFailure(call: Call<LeagueDetailResponse>, t: Throwable) {
                Log.i("FAILED GET ", "LEAGUE DETAIL ERROR : ${t} ")
            }

            override fun onResponse(
                call: Call<LeagueDetailResponse>,
                response: Response<LeagueDetailResponse>
            ) {
                response.body()?.leagues?.let {
                    for (i in it) {
                        if (i?.strBadge != null) {
                            Log.i("${i.strLeague} ", " ${i.strBadge}")
                            listItems.add(i)
                        }
                    }
                }
            }

        })
    }

    fun getData() : Unit{
        leagusListData
    }
}