Record and send voice messages (#1596)

---------

Co-authored-by: ElementBot <benoitm+elementbot@element.io>

libraries/voicerecorder/test/build.gradle.kts

@@ -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.
+ */
+
+plugins {
+    id("io.element.android-library")
+}
+
+android {
+    namespace = "io.element.android.libraries.voicerecorder.test"
+}
+
+dependencies {
+    api(projects.libraries.voicerecorder.api)
+    implementation(projects.tests.testutils)
+
+    implementation(libs.coroutines.test)
+}

libraries/voicerecorder/test/src/main/kotlin/io/element/android/libraries/voicerecorder/test/FakeVoiceRecorder.kt

@@ -0,0 +1,74 @@
+/*
+ * 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.voicerecorder.test
+
+import io.element.android.libraries.voicerecorder.api.VoiceRecorder
+import io.element.android.libraries.voicerecorder.api.VoiceRecorderState
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import java.io.File
+
+class FakeVoiceRecorder(
+    private val levels: List<Double> = listOf(0.1, 0.2)
+) : VoiceRecorder {
+    private val _state = MutableStateFlow<VoiceRecorderState>(VoiceRecorderState.Idle)
+    override val state: StateFlow<VoiceRecorderState> = _state
+
+    private var curRecording: File? = null
+
+    private var securityException: SecurityException? = null
+
+    override suspend fun startRecord() {
+        securityException?.let { throw it }
+
+        if (curRecording != null) {
+            error("Previous recording was not cleared")
+        }
+        curRecording = File("file.ogg")
+
+        levels.forEach {
+            _state.emit(VoiceRecorderState.Recording(it))
+        }
+    }
+
+    override suspend fun stopRecord(
+        cancelled: Boolean
+    ) {
+        if (cancelled) {
+            deleteRecording()
+        }
+
+        _state.emit(
+            when (curRecording) {
+                null -> VoiceRecorderState.Idle
+                else -> VoiceRecorderState.Finished(curRecording!!, "audio/ogg")
+            }
+        )
+    }
+
+    override suspend fun deleteRecording() {
+        curRecording = null
+
+        _state.emit(
+            VoiceRecorderState.Idle
+        )
+    }
+
+    fun givenThrowsSecurityException(exception: SecurityException) {
+        this.securityException = exception
+    }
+}