Merge pull request #10 from maciej-nowak/feature/testing

Feature/testing

app/build.gradle

@@ -22,6 +22,7 @@ android {
     kotlinOptions {
         jvmTarget = JavaVersion.VERSION_1_8.toString()
     }
+    sourceSets { main { resources.srcDirs = ['src/main/resources', 'src/androidTest/resources/'] } }
 }
 
 dependencies {
@@ -60,6 +61,14 @@ dependencies {
 
     //test
     testImplementation Deps.junit
+    testImplementation Deps.kotlinx_coroutines_test
+    testImplementation Deps.androidx_arch_core_testing
+    testImplementation Deps.mockito_core
+
+    //androidTest
     androidTestImplementation Deps.androidx_test_ext
     androidTestImplementation Deps.androidx_test_espresso
+    androidTestImplementation (Deps.koin_test) { exclude group: 'org.mockito' }
+    androidTestImplementation Deps.mockito_android
+    debugImplementation Deps.androidx_fragment_testing
 }

app/src/androidTest/java/pl/maciejnowak/exercise/fragment/TopArticlesFragmentTest.kt

@@ -0,0 +1,241 @@
+package pl.maciejnowak.exercise.fragment
+
+import androidx.fragment.app.testing.launchFragmentInContainer
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.click
+import androidx.test.espresso.action.ViewActions.swipeDown
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.matcher.ViewMatchers.*
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.koin.android.viewmodel.dsl.viewModel
+import org.koin.core.context.loadKoinModules
+import org.koin.dsl.module
+import org.koin.test.KoinTest
+import org.mockito.ArgumentCaptor
+import org.mockito.ArgumentMatchers.any
+import org.mockito.ArgumentMatchers.anyBoolean
+import org.mockito.Captor
+
+import org.mockito.Mock
+import org.mockito.Mockito.`when`
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+import pl.maciejnowak.exercise.R
+import pl.maciejnowak.exercise.matcher.ToastMatcher.Companion.onToast
+import pl.maciejnowak.commonobjects.entities.TopArticle
+import pl.maciejnowak.exercise.ui.fragment.TopArticlesFragment
+import pl.maciejnowak.exercise.ui.viewmodel.TopArticlesViewModel
+import pl.maciejnowak.repositories.model.TopArticlesResult
+
+@RunWith(AndroidJUnit4::class)
+class TopArticlesFragmentTest : KoinTest {
+
+    @Mock private lateinit var viewModel: TopArticlesViewModel
+    @Mock private lateinit var resultLiveData: LiveData<TopArticlesResult>
+    @Mock private lateinit var isLoadingLiveData: LiveData<Boolean>
+
+    @Captor private lateinit var resultCaptor: ArgumentCaptor<Observer<TopArticlesResult>>
+    @Captor private lateinit var isLoadingCaptor: ArgumentCaptor<Observer<Boolean>>
+
+    private val mockModule = module {
+        viewModel(override = true) { viewModel }
+    }
+    private val topArticle = TopArticle(0, "title", "user", 0L)
+
+    @Before
+    fun init() {
+        MockitoAnnotations.initMocks(this)
+        `when`(viewModel.result).thenReturn(resultLiveData)
+        `when`(viewModel.isLoading).thenReturn(isLoadingLiveData)
+        loadKoinModules(mockModule)
+        launchFragmentInContainer<TopArticlesFragment>(themeResId = R.style.AppTheme_NoActionBar)
+        verify(resultLiveData).observe(any(LifecycleOwner::class.java), resultCaptor.capture())
+        verify(isLoadingLiveData).observe(any(LifecycleOwner::class.java), isLoadingCaptor.capture())
+    }
+
+    @Test
+    fun startScreen_validateVisibility() {
+        onView(withId(R.id.error_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.swipe_refresh))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.empty_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.recycler_view))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.progressbar_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+    }
+
+    @Test
+    fun clickErrorButton_resultSuccess_validateVisibility() {
+        mockLoadTopWikis(TopArticlesResult.Success(listOf(topArticle)))
+        changeResult(TopArticlesResult.Error)
+        onView(withId(R.id.error_button)).perform(click())
+        checkViewSuccess()
+    }
+
+    @Test
+    fun clickErrorButton_resultSuccessEmpty_validateVisibility() {
+        mockLoadTopWikis(TopArticlesResult.Success(emptyList()))
+        changeResult(TopArticlesResult.Error)
+        onView(withId(R.id.error_button)).perform(click())
+        checkViewSuccessEmpty()
+    }
+
+    @Test
+    fun clickErrorButton_resultError_validateVisibility() {
+        mockLoadTopWikis(TopArticlesResult.Error)
+        changeResult(TopArticlesResult.Error)
+        onView(withId(R.id.error_button)).perform(click())
+        checkViewError()
+    }
+
+    @Test
+    fun swipeRefresh_resultSuccess_validateVisibility() {
+        mockLoadTopWikis(TopArticlesResult.Success(listOf(topArticle)))
+        changeResult(TopArticlesResult.Success(listOf(topArticle)))
+        onView(withId(R.id.swipe_refresh)).perform(swipeDown())
+        checkViewSuccess()
+    }
+
+    @Test
+    fun swipeRefresh_resultSuccessEmpty_validateVisibility() {
+        mockLoadTopWikis(TopArticlesResult.Success(emptyList()))
+        changeResult(TopArticlesResult.Success(emptyList()))
+        onView(withId(R.id.swipe_refresh)).perform(swipeDown())
+        checkViewSuccessEmpty()
+    }
+
+    @Test
+    fun swipeRefresh_whenEmpty_resultErrorRefresh_validateVisibility() {
+        mockLoadTopWikis(TopArticlesResult.ErrorRefresh(emptyList()))
+        changeResult(TopArticlesResult.Success(emptyList()))
+        onView(withId(R.id.swipe_refresh)).perform(swipeDown())
+        onToast(R.string.refresh_data_failed).check(matches(isDisplayed()))
+        checkViewSuccessEmpty()
+    }
+
+    @Test
+    fun swipeRefresh_whenData_resultErrorRefresh_validateVisibility() {
+        mockLoadTopWikis(TopArticlesResult.ErrorRefresh(emptyList()))
+        changeResult(TopArticlesResult.Success(listOf(topArticle)))
+        onView(withId(R.id.swipe_refresh)).perform(swipeDown())
+        onToast(R.string.refresh_data_failed).check(matches(isDisplayed()))
+        checkViewSuccess()
+    }
+
+    @Test
+    fun renderStartLoadingState_validateVisibility() {
+        changeIsLoading(true)
+        onView(withId(R.id.error_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.progressbar_container))
+            .check(matches(withEffectiveVisibility(Visibility.VISIBLE)))
+    }
+
+    @Test
+    fun renderFinishLoadingState_validateVisibility() {
+        changeIsLoading(false)
+        onView(withId(R.id.progressbar_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+    }
+
+    @Test
+    fun renderSuccessState_validateVisibility() {
+        changeResult(TopArticlesResult.Success(listOf(topArticle)))
+        checkViewSuccess()
+    }
+
+    @Test
+    fun renderSuccessEmptyState_validateVisibility() {
+        changeResult(TopArticlesResult.Success(emptyList()))
+        checkViewSuccessEmpty()
+    }
+
+    @Test
+    fun renderErrorRefreshState_validateVisibility() {
+        changeResult(TopArticlesResult.ErrorRefresh(listOf(topArticle)))
+        onToast(R.string.refresh_data_failed).check(matches(isDisplayed()))
+        checkViewSuccess()
+    }
+
+    @Test
+    fun renderErrorRefreshEmptyState_validateVisibility() {
+        changeResult(TopArticlesResult.ErrorRefresh(emptyList()))
+        onToast(R.string.refresh_data_failed).check(matches(isDisplayed()))
+        checkViewSuccessEmpty()
+    }
+
+    @Test
+    fun renderErrorState_validateVisibility() {
+        changeResult(TopArticlesResult.Error)
+        checkViewError()
+    }
+
+    private fun changeResult(result: TopArticlesResult) {
+        InstrumentationRegistry.getInstrumentation().runOnMainSync {
+            resultCaptor.value.onChanged(result)
+        }
+        mockIsSuccess(result !is TopArticlesResult.Error)
+    }
+
+    private fun changeIsLoading(enable: Boolean) {
+        InstrumentationRegistry.getInstrumentation().runOnMainSync {
+            isLoadingCaptor.value.onChanged(enable)
+        }
+    }
+
+    private fun mockLoadTopWikis(result: TopArticlesResult) {
+        `when`(viewModel.loadTopArticles(anyBoolean())).then {
+            isLoadingCaptor.value.onChanged(true)
+            resultCaptor.value.onChanged(result)
+            isLoadingCaptor.value.onChanged(false)
+        }
+        mockIsSuccess(result !is TopArticlesResult.Error)
+    }
+
+    private fun mockIsSuccess(isSuccess: Boolean) {
+        `when`(viewModel.isSuccess()).thenReturn(isSuccess)
+    }
+
+    private fun checkViewSuccess() {
+        onView(withId(R.id.error_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.recycler_view))
+            .check(matches(withEffectiveVisibility(Visibility.VISIBLE)))
+        onView(withId(R.id.swipe_refresh))
+            .check(matches(withEffectiveVisibility(Visibility.VISIBLE)))
+        onView(withId(R.id.empty_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+    }
+
+    private fun checkViewSuccessEmpty() {
+        onView(withId(R.id.error_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.recycler_view))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.swipe_refresh))
+            .check(matches(withEffectiveVisibility(Visibility.VISIBLE)))
+        onView(withId(R.id.empty_container))
+            .check(matches(withEffectiveVisibility(Visibility.VISIBLE)))
+    }
+
+    private fun checkViewError() {
+        onView(withId(R.id.error_container))
+            .check(matches(withEffectiveVisibility(Visibility.VISIBLE)))
+        onView(withId(R.id.recycler_view))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.swipe_refresh))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+        onView(withId(R.id.empty_container))
+            .check(matches(withEffectiveVisibility(Visibility.GONE)))
+    }
+}