feat(content): 랭킹 ViewModel을 추가한다
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package kr.co.vividnext.sodalive.v2.main.content
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import android.app.Application
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import android.content.Context
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import androidx.lifecycle.LiveData
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import androidx.lifecycle.Observer
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import androidx.test.core.app.ApplicationProvider
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import io.reactivex.rxjava3.android.plugins.RxAndroidPlugins
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import io.reactivex.rxjava3.core.Scheduler
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import io.reactivex.rxjava3.core.Single
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import io.reactivex.rxjava3.plugins.RxJavaPlugins
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import io.reactivex.rxjava3.schedulers.Schedulers
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import io.reactivex.rxjava3.subjects.SingleSubject
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import kr.co.vividnext.sodalive.R
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import kr.co.vividnext.sodalive.common.ApiResponse
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import kr.co.vividnext.sodalive.common.SharedPreferenceManager
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import kr.co.vividnext.sodalive.v2.main.content.data.AudioRankingItemResponse
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import kr.co.vividnext.sodalive.v2.main.content.data.AudioRankingResponse
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import kr.co.vividnext.sodalive.v2.main.content.data.AudioRankingType
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import kr.co.vividnext.sodalive.v2.main.content.data.AudioRankingsApi
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import kr.co.vividnext.sodalive.v2.main.content.data.AudioRankingsRepository
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import kr.co.vividnext.sodalive.v2.main.content.model.AudioRankingsUiState
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import org.junit.After
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import org.junit.Assert.assertEquals
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import org.junit.Assert.assertFalse
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import org.junit.Before
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import org.junit.Test
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import org.junit.runner.RunWith
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import org.robolectric.RobolectricTestRunner
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import org.robolectric.annotation.Config
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@RunWith(RobolectricTestRunner::class)
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@Config(sdk = [28], application = Application::class)
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class ContentRankingViewModelTest {
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private val context: Context = ApplicationProvider.getApplicationContext()
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private lateinit var api: FakeAudioRankingsApi
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private lateinit var viewModel: ContentRankingViewModel
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@Before
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fun setUp() {
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setImmediateRxSchedulers()
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SharedPreferenceManager.resetForTest()
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SharedPreferenceManager.init(context)
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SharedPreferenceManager.token = "test-token"
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api = FakeAudioRankingsApi()
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viewModel = ContentRankingViewModel(
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repository = AudioRankingsRepository(api)
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)
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}
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@After
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fun tearDown() {
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RxJavaPlugins.reset()
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RxAndroidPlugins.reset()
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SharedPreferenceManager.resetForTest()
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}
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@Test
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fun `초기 selected type은 WEEKLY_POPULAR다`() {
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assertEquals(AudioRankingType.WEEKLY_POPULAR, viewModel.selectedTypeLiveData.requireValue())
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}
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@Test
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fun `랭킹 로드는 token과 type으로 API를 요청한다`() {
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api.enqueueSuccess(response(type = AudioRankingType.WEEKLY_POPULAR))
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viewModel.loadRankings(AudioRankingType.WEEKLY_POPULAR)
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assertEquals(listOf(ApiCall("Bearer test-token", AudioRankingType.WEEKLY_POPULAR)), api.calls)
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}
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@Test
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fun `success와 item이 있으면 Content를 emit한다`() {
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api.enqueueSuccess(
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response(
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type = AudioRankingType.RISING,
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items = listOf(item(contentId = 10L, rank = 1, title = "오디오"))
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)
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)
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viewModel.loadRankings(AudioRankingType.RISING)
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val state = viewModel.rankingStateLiveData.requireValue() as AudioRankingsUiState.Content
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assertEquals(AudioRankingType.RISING, state.type)
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assertEquals(listOf("10"), state.items.map { it.contentId })
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assertEquals("오디오", state.items.first().contentName)
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assertFalse(viewModel.isLoading.requireValue() ?: true)
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}
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@Test
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fun `success와 item이 비어 있으면 Empty를 emit한다`() {
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api.enqueueSuccess(response(type = AudioRankingType.REVENUE, items = emptyList()))
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viewModel.loadRankings(AudioRankingType.REVENUE)
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val state = viewModel.rankingStateLiveData.requireValue() as AudioRankingsUiState.Empty
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assertEquals(AudioRankingType.REVENUE, state.type)
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}
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@Test
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fun `API failure는 Error와 unknown error toast를 emit한다`() {
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api.enqueueSuccess(ApiResponse(false, null, "failed"))
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viewModel.loadRankings(AudioRankingType.SALES_COUNT)
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val state = viewModel.rankingStateLiveData.requireValue() as AudioRankingsUiState.Error
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assertEquals(AudioRankingType.SALES_COUNT, state.type)
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assertEquals("failed", state.message)
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assertEquals(R.string.common_error_unknown, viewModel.toastLiveData.requireValue()?.resId)
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}
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@Test
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fun `Throwable은 Error와 unknown error toast를 emit한다`() {
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api.enqueue(Single.error(IllegalStateException("network")))
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viewModel.loadRankings(AudioRankingType.COMMENT_COUNT)
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val state = viewModel.rankingStateLiveData.requireValue() as AudioRankingsUiState.Error
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assertEquals(AudioRankingType.COMMENT_COUNT, state.type)
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assertEquals("network", state.message)
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assertEquals(R.string.common_error_unknown, viewModel.toastLiveData.requireValue()?.resId)
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}
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@Test
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fun `같은 type을 이미 성공 로드했고 force false이면 API를 재호출하지 않는다`() {
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api.enqueueSuccess(response(type = AudioRankingType.LIKE_COUNT))
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viewModel.loadRankings(AudioRankingType.LIKE_COUNT)
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viewModel.loadRankings(AudioRankingType.LIKE_COUNT)
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assertEquals(1, api.calls.size)
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}
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@Test
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fun `이미 로드한 type을 다시 선택하면 API 재호출 없이 캐시된 상태를 emit한다`() {
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api.enqueueSuccess(response(type = AudioRankingType.WEEKLY_POPULAR, items = listOf(item(contentId = 1L))))
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viewModel.loadRankings(AudioRankingType.WEEKLY_POPULAR)
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api.enqueueSuccess(response(type = AudioRankingType.RISING, items = listOf(item(contentId = 2L))))
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viewModel.loadRankings(AudioRankingType.RISING)
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viewModel.loadRankings(AudioRankingType.WEEKLY_POPULAR)
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val state = viewModel.rankingStateLiveData.requireValue() as AudioRankingsUiState.Content
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assertEquals(2, api.calls.size)
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assertEquals(AudioRankingType.WEEKLY_POPULAR, state.type)
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assertEquals(listOf("1"), state.items.map { it.contentId })
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}
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@Test
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fun `force true이면 같은 type도 다시 호출한다`() {
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api.enqueueSuccess(response(type = AudioRankingType.WEEKLY_POPULAR, items = listOf(item(contentId = 1L))))
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api.enqueueSuccess(response(type = AudioRankingType.WEEKLY_POPULAR, items = listOf(item(contentId = 2L))))
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viewModel.loadRankings(AudioRankingType.WEEKLY_POPULAR)
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viewModel.loadRankings(AudioRankingType.WEEKLY_POPULAR, force = true)
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assertEquals(2, api.calls.size)
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val state = viewModel.rankingStateLiveData.requireValue() as AudioRankingsUiState.Content
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assertEquals(listOf("2"), state.items.map { it.contentId })
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}
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@Test
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fun `선택 type 변경 전 응답이 늦게 도착하면 화면 상태를 덮어쓰지 않는다`() {
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val pendingWeekly = SingleSubject.create<ApiResponse<AudioRankingResponse>>()
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api.enqueue(pendingWeekly)
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viewModel.loadRankings(AudioRankingType.WEEKLY_POPULAR)
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api.enqueueSuccess(response(type = AudioRankingType.RISING, items = listOf(item(contentId = 2L))))
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viewModel.loadRankings(AudioRankingType.RISING)
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pendingWeekly.onSuccess(
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ApiResponse(
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true,
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response(type = AudioRankingType.WEEKLY_POPULAR, items = listOf(item(contentId = 1L))),
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null
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)
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)
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val state = viewModel.rankingStateLiveData.requireValue() as AudioRankingsUiState.Content
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assertEquals(AudioRankingType.RISING, state.type)
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assertEquals(listOf("2"), state.items.map { it.contentId })
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}
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@Test
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fun `이전 type 응답이 늦게 도착해도 현재 로딩 상태를 끄지 않는다`() {
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val pendingWeekly = SingleSubject.create<ApiResponse<AudioRankingResponse>>()
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val pendingRising = SingleSubject.create<ApiResponse<AudioRankingResponse>>()
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api.enqueue(pendingWeekly)
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viewModel.loadRankings(AudioRankingType.WEEKLY_POPULAR)
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api.enqueue(pendingRising)
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viewModel.loadRankings(AudioRankingType.RISING)
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pendingWeekly.onSuccess(
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ApiResponse(
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true,
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response(type = AudioRankingType.WEEKLY_POPULAR, items = listOf(item(contentId = 1L))),
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null
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)
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)
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assertEquals(true, viewModel.isLoading.requireValue())
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pendingRising.onSuccess(
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ApiResponse(
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true,
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response(type = AudioRankingType.RISING, items = listOf(item(contentId = 2L))),
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null
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)
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)
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assertEquals(false, viewModel.isLoading.requireValue())
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}
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private fun setImmediateRxSchedulers() {
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val trampoline = { _: Scheduler -> Schedulers.trampoline() }
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RxJavaPlugins.setIoSchedulerHandler(trampoline)
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RxAndroidPlugins.setInitMainThreadSchedulerHandler { Schedulers.trampoline() }
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RxAndroidPlugins.setMainThreadSchedulerHandler { Schedulers.trampoline() }
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}
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private fun response(
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type: AudioRankingType,
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items: List<AudioRankingItemResponse> = listOf(item())
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) = AudioRankingResponse(
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showRankChange = false,
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type = type,
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items = items
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)
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private fun item(
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contentId: Long = 1L,
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rank: Int = 1,
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title: String = "랭킹 오디오"
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) = AudioRankingItemResponse(
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contentId = contentId,
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title = title,
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creatorNickname = "크리에이터",
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rank = rank,
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rankChange = 0,
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isNew = false,
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coverImageUrl = "https://example.com/cover.png"
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)
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private fun <T> LiveData<T>.requireValue(): T? {
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var value: T? = null
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val observer = Observer<T> { value = it }
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observeForever(observer)
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removeObserver(observer)
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return value
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}
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private data class ApiCall(
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val token: String,
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val type: AudioRankingType
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)
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private class FakeAudioRankingsApi : AudioRankingsApi {
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val calls = mutableListOf<ApiCall>()
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private val responses = ArrayDeque<Single<ApiResponse<AudioRankingResponse>>>()
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fun enqueueSuccess(response: AudioRankingResponse) {
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enqueue(ApiResponse(true, response, null))
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}
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fun enqueueSuccess(response: ApiResponse<AudioRankingResponse>) {
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enqueue(Single.just(response))
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}
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fun enqueue(response: ApiResponse<AudioRankingResponse>) {
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enqueue(Single.just(response))
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}
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fun enqueue(response: Single<ApiResponse<AudioRankingResponse>>) {
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responses.addLast(response)
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}
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override fun getRankings(
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authHeader: String,
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type: AudioRankingType
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): Single<ApiResponse<AudioRankingResponse>> {
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calls.add(ApiCall(authHeader, type))
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return responses.removeFirst()
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}
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}
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}
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