Add test for `LogoutPreferencePresenter`

features/logout/build.gradle.kts

@@ -40,6 +40,13 @@ dependencies {
     implementation(projects.libraries.elementresources)
     implementation(projects.libraries.uiStrings)
     ksp(libs.showkase.processor)
+
     testImplementation(libs.test.junit)
+    testImplementation(libs.coroutines.test)
+    testImplementation(libs.molecule.runtime)
+    testImplementation(libs.test.truth)
+    testImplementation(libs.test.turbine)
+    testImplementation(projects.libraries.matrixtest)
+
     androidTestImplementation(libs.test.junitext)
 }

features/logout/src/test/kotlin/io/element/android/features/logout/LogoutPreferencePresenterTest.kt

@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@file:OptIn(ExperimentalCoroutinesApi::class)
+
+package io.element.android.features.logout
+
+import app.cash.molecule.RecompositionClock
+import app.cash.molecule.moleculeFlow
+import app.cash.turbine.test
+import com.google.common.truth.Truth.assertThat
+import io.element.android.libraries.architecture.Async
+import io.element.android.libraries.matrix.core.SessionId
+import io.element.android.libraries.matrixtest.FakeMatrixClient
+import io.element.android.libraries.matrixtest.auth.A_FAILURE
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+
+class LogoutPreferencePresenterTest {
+    @Test
+    fun `present - initial state`() = runTest {
+        val presenter = LogoutPreferencePresenter(
+            FakeMatrixClient(SessionId("sessionId")),
+        )
+        moleculeFlow(RecompositionClock.Immediate) {
+            presenter.present()
+        }.test {
+            val initialState = awaitItem()
+            assertThat(initialState.logoutAction).isEqualTo(Async.Uninitialized)
+        }
+    }
+
+    @Test
+    fun `present - logout`() = runTest {
+        val presenter = LogoutPreferencePresenter(
+            FakeMatrixClient(SessionId("sessionId")),
+        )
+        moleculeFlow(RecompositionClock.Immediate) {
+            presenter.present()
+        }.test {
+            val initialState = awaitItem()
+            initialState.eventSink.invoke(LogoutPreferenceEvents.Logout)
+            val loadingState = awaitItem()
+            assertThat(loadingState.logoutAction).isInstanceOf(Async.Loading::class.java)
+            val successState = awaitItem()
+            assertThat(successState.logoutAction).isInstanceOf(Async.Success::class.java)
+        }
+    }
+
+    @Test
+    fun `present - logout with error`() = runTest {
+        val matrixClient = FakeMatrixClient(SessionId("sessionId"))
+        val presenter = LogoutPreferencePresenter(
+            matrixClient,
+        )
+        moleculeFlow(RecompositionClock.Immediate) {
+            presenter.present()
+        }.test {
+            val initialState = awaitItem()
+            matrixClient.givenLogoutError(A_FAILURE)
+            initialState.eventSink.invoke(LogoutPreferenceEvents.Logout)
+            val loadingState = awaitItem()
+            assertThat(loadingState.logoutAction).isInstanceOf(Async.Loading::class.java)
+            val successState = awaitItem()
+            assertThat(successState.logoutAction).isEqualTo(Async.Failure<LogoutPreferenceState>(A_FAILURE))
+        }
+    }
+}
+

libraries/matrixtest/src/main/kotlin/io/element/android/libraries/matrixtest/FakeMatrixClient.kt

@@ -26,6 +26,7 @@ import io.element.android.libraries.matrix.room.RoomSummaryDataSource
 import io.element.android.libraries.matrixtest.media.FakeMediaResolver
 import io.element.android.libraries.matrixtest.room.FakeMatrixRoom
 import io.element.android.libraries.matrixtest.room.FakeRoomSummaryDataSource
+import kotlinx.coroutines.delay
 import org.matrix.rustcomponents.sdk.MediaSource
 
 class FakeMatrixClient(
@@ -33,6 +34,8 @@ class FakeMatrixClient(
     val roomSummaryDataSource: RoomSummaryDataSource = FakeRoomSummaryDataSource()
 ) : MatrixClient {
 
+    private var logoutFailure: Throwable? = null
+
     override fun getRoom(roomId: RoomId): MatrixRoom? {
         return FakeMatrixRoom(roomId)
     }
@@ -49,7 +52,14 @@ class FakeMatrixClient(
         return FakeMediaResolver()
     }
 
-    override suspend fun logout() = Unit
+    fun givenLogoutError(failure: Throwable) {
+        logoutFailure = failure
+    }
+
+    override suspend fun logout() {
+        delay(100)
+        logoutFailure?.let { throw it }
+    }
 
     override fun userId(): UserId = UserId("")