Add UI to record a voice message from the composer toolbar (#1892)

UnitTests/Sources/AudioRecorderStateTests.swift

@@ -0,0 +1,100 @@
+//
+// Copyright 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.
+//
+
+import Combine
+@testable import ElementX
+import Foundation
+import XCTest
+
+@MainActor
+class AudioRecorderStateTests: XCTestCase {
+    private var audioRecorderState: AudioRecorderState!
+    private var audioRecorderMock: AudioRecorderMock!
+    
+    private var audioRecorderActionsSubject: PassthroughSubject<AudioRecorderAction, Never>!
+    private var audioRecorderActions: AnyPublisher<AudioRecorderAction, Never> {
+        audioRecorderActionsSubject.eraseToAnyPublisher()
+    }
+        
+    private func buildAudioRecorderMock() -> AudioRecorderMock {
+        let audioRecorderMock = AudioRecorderMock()
+        audioRecorderMock.underlyingActions = audioRecorderActions
+        audioRecorderMock.currentTime = 0.0
+        return audioRecorderMock
+    }
+    
+    override func setUp() async throws {
+        audioRecorderActionsSubject = .init()
+        audioRecorderState = AudioRecorderState()
+        audioRecorderMock = buildAudioRecorderMock()
+    }
+    
+    func testAttach() async throws {
+        audioRecorderState.attachAudioRecorder(audioRecorderMock)
+        
+        XCTAssertEqual(audioRecorderState.recordingState, .stopped)
+    }
+    
+    func testDetach() async throws {
+        audioRecorderState.attachAudioRecorder(audioRecorderMock)
+        
+        audioRecorderState.detachAudioRecorder()
+        XCTAssert(audioRecorderMock.stopRecordingCalled)
+        XCTAssertEqual(audioRecorderState.recordingState, .stopped)
+    }
+    
+    func testReportError() async throws {
+        XCTAssertEqual(audioRecorderState.recordingState, .stopped)
+        audioRecorderState.reportError(AudioRecorderError.genericError)
+        XCTAssertEqual(audioRecorderState.recordingState, .error)
+    }
+    
+    func testHandlingAudioRecorderActionDidStartRecording() async throws {
+        audioRecorderState.attachAudioRecorder(audioRecorderMock)
+
+        let deferred = deferFulfillment(audioRecorderState.$recordingState) { action in
+            switch action {
+            case .recording:
+                return true
+            default:
+                return false
+            }
+        }
+        
+        audioRecorderActionsSubject.send(.didStartRecording)
+        try await deferred.fulfill()
+        XCTAssertEqual(audioRecorderState.recordingState, .recording)
+    }
+
+    func testHandlingAudioPlayerActionDidStopRecording() async throws {
+        audioRecorderState.attachAudioRecorder(audioRecorderMock)
+
+        let deferred = deferFulfillment(audioRecorderState.$recordingState) { action in
+            switch action {
+            case .stopped:
+                return true
+            default:
+                return false
+            }
+        }
+        
+        audioRecorderActionsSubject.send(.didStopRecording)
+        try await deferred.fulfill()
+        
+        // The state is expected to be .readyToPlay
+        XCTAssertEqual(audioRecorderState.recordingState, .stopped)
+    }
+}