MviExperiments/data/src/test/java/com/pppp/database/RepositoryImplTest.kt at develop · pietmau/MviExperiments · GitHub

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package com.pppp.database

import com.nhaarman.mockitokotlin2.never
import com.nhaarman.mockitokotlin2.verify
import com.nhaarman.mockitokotlin2.whenever
import com.pppp.database.repository.RepositoryImpl
import com.pppp.lib.ComicsBook
import com.pppp.network.model.ComicsClient
import com.pppp.network.model.networkchecker.NetworkChecker
import io.reactivex.Observable
import io.reactivex.Single
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import org.mockito.Mock
import org.mockito.junit.MockitoJUnitRunner

@RunWith(MockitoJUnitRunner::class)
class RepositoryImplTest {
    @Mock
    lateinit var db: ComicsDatabase
    @Mock
    lateinit var api: ComicsClient
    @Mock
    lateinit var networkChecker: NetworkChecker
    private lateinit var repo: RepositoryImpl
    @Mock
    lateinit var book: ComicsBook
    private lateinit var comics: List<ComicsBook>

    @Before
    fun setUp() {
        repo = RepositoryImpl(db, api, networkChecker)
        comics = listOf(book)
        whenever(api.getComics()).thenReturn(Observable.just(comics))
        whenever(networkChecker.isNetworkAvailable()).thenReturn(Single.just(true))
    }

    @Test
    fun when_noNetwork_then_usesCache() {
        // GIVEN
        whenever(networkChecker.isNetworkAvailable()).thenReturn(Single.just(false))
        // WHEN
        test()
        // THEN
        verify(db).getAllComics()
        verify(api, never()).getComics()
    }

    @Test
    fun when_network_then_usesApi() {
        // WHEN
        test()
        // THEN
        verify(db, never()).getAllComics()
        verify(api).getComics()
    }

    @Test
    fun when_successful_then_savesResponse() {
        // WHEN
        test()
        // THEN
        verify(db).saveComics(comics)
    }

    @Test
    fun when_getComicsById_then_queriesDb() {
        // WHEN
        repo.getComicById(ID)
        // THEN
        verify(db).getComicById(ID)
    }

    private fun test() {
        repo.getComics().test()
    }

    companion object {
        private const val ID = 123456
    }
}