Create FakeLastMessageFormatter

app/build.gradle.kts

@@ -175,6 +175,7 @@ dependencies {
     implementation(libs.androidx.activity.compose)
     implementation(libs.androidx.startup)
     implementation(libs.coil)
+    implementation(libs.datetime)
 
     implementation(libs.dagger)
     kapt(libs.dagger.compiler)

features/roomlist/src/test/kotlin/io/element/android/features/roomlist/FakeLastMessageFormatter.kt

@@ -0,0 +1,30 @@
+/*
+ * 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.
+ */
+
+package io.element.android.features.roomlist
+
+import io.element.android.libraries.dateformatter.LastMessageFormatter
+
+class FakeLastMessageFormatter : LastMessageFormatter {
+    private var format = ""
+    fun givenFormat(format: String) {
+        this.format = format
+    }
+
+    override fun format(timestamp: Long?): String {
+        return format
+    }
+}

features/roomlist/src/test/kotlin/io/element/android/features/roomlist/RoomListPresenterTests.kt

@@ -24,7 +24,7 @@ import app.cash.turbine.test
 import com.google.common.truth.Truth.assertThat
 import io.element.android.features.roomlist.model.RoomListEvents
 import io.element.android.features.roomlist.model.RoomListRoomSummary
-import io.element.android.libraries.dateformatter.impl.DefaultLastMessageFormatter
+import io.element.android.libraries.dateformatter.LastMessageFormatter
 import io.element.android.libraries.designsystem.components.avatar.AvatarData
 import io.element.android.libraries.matrix.core.SessionId
 import io.element.android.libraries.matrixtest.FakeMatrixClient
@@ -46,7 +46,7 @@ class RoomListPresenterTests {
             FakeMatrixClient(
                 SessionId("sessionId")
             ),
-            DefaultLastMessageFormatter()
+            createDateFormatter()
         )
         moleculeFlow(RecompositionClock.Immediate) {
             presenter.present()
@@ -64,7 +64,7 @@ class RoomListPresenterTests {
             FakeMatrixClient(
                 SessionId("sessionId")
             ),
-            DefaultLastMessageFormatter()
+            createDateFormatter()
         )
         moleculeFlow(RecompositionClock.Immediate) {
             presenter.present()
@@ -86,7 +86,7 @@ class RoomListPresenterTests {
                 sessionId = SessionId("sessionId"),
                 roomSummaryDataSource = roomSummaryDataSource
             ),
-            DefaultLastMessageFormatter()
+            createDateFormatter()
         )
         moleculeFlow(RecompositionClock.Immediate) {
             presenter.present()
@@ -112,7 +112,7 @@ class RoomListPresenterTests {
                 sessionId = SessionId("sessionId"),
                 roomSummaryDataSource = roomSummaryDataSource
             ),
-            DefaultLastMessageFormatter()
+            createDateFormatter()
         )
         moleculeFlow(RecompositionClock.Immediate) {
             presenter.present()
@@ -143,7 +143,7 @@ class RoomListPresenterTests {
                 sessionId = SessionId("sessionId"),
                 roomSummaryDataSource = roomSummaryDataSource
             ),
-            DefaultLastMessageFormatter()
+            createDateFormatter()
         )
         moleculeFlow(RecompositionClock.Immediate) {
             presenter.present()
@@ -171,14 +171,22 @@ class RoomListPresenterTests {
             assertThat(roomSummaryDataSource.latestSlidingSyncRange).isEqualTo(IntRange(129, 279))
         }
     }
+
+    private fun createDateFormatter(): LastMessageFormatter {
+        return FakeLastMessageFormatter().apply {
+            givenFormat(A_FORMATTED_DATE)
+        }
+    }
 }
 
+private const val A_FORMATTED_DATE = "formatted_date"
+
 private val aRoomListRoomSummary = RoomListRoomSummary(
     id = A_ROOM_ID_VALUE,
     roomId = A_ROOM_ID,
     name = A_ROOM_NAME,
     hasUnread = true,
-    timestamp = "",
+    timestamp = A_FORMATTED_DATE,
     lastMessage = A_LAST_MESSAGE,
     avatarData = AvatarData(name = A_ROOM_NAME),
     isPlaceholder = false,

libraries/dateformatter/src/main/kotlin/io/element/android/libraries/dateformatter/di/DateFormatterModule.kt

@@ -0,0 +1,34 @@
+/*
+ * 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.
+ */
+
+package io.element.android.libraries.dateformatter.di
+
+import com.squareup.anvil.annotations.ContributesTo
+import dagger.Module
+import dagger.Provides
+import io.element.android.libraries.di.AppScope
+import kotlinx.datetime.Clock
+import java.util.*
+
+@Module
+@ContributesTo(AppScope::class)
+object DateFormatterModule {
+    @Provides
+    fun providesClock(): Clock = Clock.System
+
+    @Provides
+    fun providesLocale(): Locale = Locale.getDefault()
+}

libraries/dateformatter/src/main/kotlin/io/element/android/libraries/dateformatter/impl/DefaultLastMessageFormatter.kt

@@ -36,13 +36,10 @@ import javax.inject.Inject
 import kotlin.math.absoluteValue
 
 @ContributesBinding(AppScope::class)
-class DefaultLastMessageFormatter @Inject constructor() : LastMessageFormatter {
-
-    // TODO Inject in constructor
-    private val clock: Clock = Clock.System
-    // TODO Inject in constructor
-    private val locale: Locale = Locale.getDefault()
-
+class DefaultLastMessageFormatter @Inject constructor(
+    private val clock: Clock,
+    private val locale: Locale,
+) : LastMessageFormatter {
     private val onlyTimeFormatter: DateTimeFormatter by lazy {
         val pattern = DateFormat.getBestDateTimePattern(locale, "HH:mm")
         DateTimeFormatter.ofPattern(pattern)