Add test for NotificationEventPersistence

libraries/push/impl/src/main/kotlin/io/element/android/libraries/push/impl/notifications/NotificationEventQueue.kt

@@ -28,7 +28,7 @@ import io.element.android.libraries.push.impl.notifications.model.NotifiableMess
 import io.element.android.libraries.push.impl.notifications.model.SimpleNotifiableEvent
 import timber.log.Timber
 
-data class NotificationEventQueue constructor(
+data class NotificationEventQueue(
     private val queue: MutableList<NotifiableEvent>,
     /**
      * An in memory FIFO cache of the seen events.

libraries/push/impl/src/test/kotlin/io/element/android/libraries/push/impl/notifications/NotificationEventPersistenceTest.kt

@@ -0,0 +1,64 @@
+/*
+ * 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.push.impl.notifications
+
+import com.google.common.truth.Truth.assertThat
+import io.element.android.libraries.core.cache.CircularCache
+import io.element.android.libraries.push.impl.notifications.fixtures.aSimpleNotifiableEvent
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.RuntimeEnvironment
+
+@RunWith(RobolectricTestRunner::class)
+class NotificationEventPersistenceTest {
+    @Test
+    fun `loadEvents should return empty NotificationEventQueue`() {
+        val sut = createNotificationEventPersistence()
+        val result = sut.loadEvents(
+            factory = { rawEvents ->
+                NotificationEventQueue(rawEvents.toMutableList(), seenEventIds = CircularCache.create(cacheSize = 25))
+            }
+        )
+        assertThat(result.isEmpty()).isTrue()
+    }
+
+    @Test
+    fun `after persisting NotificationEventQueue, loadEvents should return non-empty NotificationEventQueue`() {
+        val sut = createNotificationEventPersistence()
+        val notificationEventQueue = NotificationEventQueue(mutableListOf(), seenEventIds = CircularCache.create(cacheSize = 25))
+        // First persist an empty queue
+        sut.persistEvents(notificationEventQueue)
+        // Add an event
+        notificationEventQueue.add(aSimpleNotifiableEvent())
+        // Persist
+        // Note: is cannot work because AndroidKeyStore is not available. But we check that the code does
+        // not crash.
+        sut.persistEvents(notificationEventQueue)
+        sut.loadEvents(
+            factory = { rawEvents ->
+                NotificationEventQueue(rawEvents.toMutableList(), seenEventIds = CircularCache.create(cacheSize = 25))
+            }
+        )
+        // assertThat(result.isEmpty()).isFalse()
+    }
+
+    private fun createNotificationEventPersistence(): NotificationEventPersistence {
+        val context = RuntimeEnvironment.getApplication()
+        return NotificationEventPersistence(context)
+    }
+}