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kozmi55kozmi55
committedSep 12, 2017
Added UserListPresenterTest and ImmediateSchedulerRule
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‎app/src/test/java/com/example/tamaskozmer/kotlinrxexample/presentation/presenters/UserListPresenterTest.kt

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package com.example.tamaskozmer.kotlinrxexample.presentation.presenters
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import com.example.tamaskozmer.kotlinrxexample.domain.interactors.GetUsers
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import com.example.tamaskozmer.kotlinrxexample.presentation.view.UserListView
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import com.example.tamaskozmer.kotlinrxexample.presentation.view.viewmodels.UserViewModel
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import com.example.tamaskozmer.kotlinrxexample.testutil.ImmediateSchedulerRule
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import io.reactivex.Single
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import org.junit.Before
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import org.junit.Rule
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import org.junit.Test
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import org.mockito.Mock
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import org.mockito.Mockito.anyBoolean
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import org.mockito.Mockito.anyInt
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import org.mockito.Mockito.times
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import org.mockito.Mockito.verify
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import org.mockito.MockitoAnnotations
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import org.mockito.Mockito.`when` as whenever
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/**
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* Created by Tamas_Kozmer on 7/21/2017.
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*/
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class UserListPresenterTest {
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@Rule @JvmField
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val immediateSchedulerRule = ImmediateSchedulerRule()
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@Mock
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lateinit var mockGetUsers: GetUsers
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@Mock
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lateinit var mockView: UserListView
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lateinit var userListPresenter: UserListPresenter
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@Before
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fun setUp() {
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MockitoAnnotations.initMocks(this)
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userListPresenter = UserListPresenter(mockGetUsers)
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}
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@Test
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fun testGetUsers_errorCase_showError() {
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// Given
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val error = "Test error"
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val single: Single<List<UserViewModel>> = Single.create {
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emitter ->
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emitter.onError(Exception(error))
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}
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// When
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whenever(mockGetUsers.execute(anyInt(), anyBoolean())).thenReturn(single)
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userListPresenter.attachView(mockView)
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userListPresenter.getUsers()
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// Then
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verify(mockView).hideLoading()
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verify(mockView).showEmptyListError()
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}
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@Test
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fun testGetUsers_successCaseFirstPage_clearList() {
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// Given
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val users = listOf(UserViewModel(1, "Name", 1000, ""))
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val single: Single<List<UserViewModel>> = Single.create {
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emitter ->
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emitter.onSuccess(users)
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}
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// When
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whenever(mockGetUsers.execute(anyInt(), anyBoolean())).thenReturn(single)
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userListPresenter.attachView(mockView)
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userListPresenter.getUsers()
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// Then
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verify(mockView).clearList()
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}
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@Test
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fun testGetUsers_successCaseMultipleTimes_clearListOnlyOnce() {
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// Given
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val users = listOf(UserViewModel(1, "Name", 1000, ""))
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val single: Single<List<UserViewModel>> = Single.create {
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emitter ->
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emitter.onSuccess(users)
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}
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// When
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whenever(mockGetUsers.execute(anyInt(), anyBoolean())).thenReturn(single)
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userListPresenter.attachView(mockView)
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userListPresenter.getUsers()
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userListPresenter.getUsers()
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// Then
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verify(mockView).clearList()
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verify(mockView, times(2)).hideLoading()
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verify(mockView, times(2)).addUsersToList(users)
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}
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@Test
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fun testGetUsers_forcedSuccessCaseMultipleTimes_clearListEveryTime() {
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// Given
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val users = listOf(UserViewModel(1, "Name", 1000, ""))
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val single: Single<List<UserViewModel>> = Single.create {
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emitter ->
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emitter.onSuccess(users)
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}
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// When
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whenever(mockGetUsers.execute(anyInt(), anyBoolean())).thenReturn(single)
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userListPresenter.attachView(mockView)
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userListPresenter.getUsers(forced = true)
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userListPresenter.getUsers(forced = true)
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// Then
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verify(mockView, times(2)).clearList()
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verify(mockView, times(2)).hideLoading()
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verify(mockView, times(2)).addUsersToList(users)
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}
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}

‎app/src/test/java/com/example/tamaskozmer/kotlinrxexample/testutil/ImmediateSchedulerRule.kt

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package com.example.tamaskozmer.kotlinrxexample.testutil
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import io.reactivex.Scheduler
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import io.reactivex.android.plugins.RxAndroidPlugins
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import io.reactivex.internal.schedulers.ExecutorScheduler
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import io.reactivex.plugins.RxJavaPlugins
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import org.junit.rules.TestRule
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import org.junit.runner.Description
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import org.junit.runners.model.Statement
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import java.util.concurrent.Executor
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/**
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* Created by Tamas_Kozmer on 7/21/2017.
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*/
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class ImmediateSchedulerRule : TestRule {
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private val immediate = object : Scheduler() {
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override fun createWorker(): Worker {
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return ExecutorScheduler.ExecutorWorker(Executor { it.run() })
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}
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}
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override fun apply(base: Statement, d: Description): Statement {
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return object : Statement() {
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@Throws(Throwable::class)
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override fun evaluate() {
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RxJavaPlugins.setInitIoSchedulerHandler { immediate }
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RxJavaPlugins.setInitComputationSchedulerHandler { immediate }
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RxJavaPlugins.setInitNewThreadSchedulerHandler { immediate }
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RxJavaPlugins.setInitSingleSchedulerHandler { immediate }
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RxAndroidPlugins.setInitMainThreadSchedulerHandler { immediate }
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try {
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base.evaluate()
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} finally {
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RxJavaPlugins.reset()
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RxAndroidPlugins.reset()
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}
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}
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}
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}
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}

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