UITests and Mock Screens

Adds the test targets for Unit and UI tests
Adds mock screen data and utilities to render each mock screen for previews/ui tests.
Changes Published property in the service to CurrentValueSubject. we don't need the synthesized aspect of Published and property wrappers cannot be included in protocols.

RiotSwiftUI/Modules/Template/SimpleUserProfileExample/Service/Mock/MockTemplateProfileUserScreen.swift

@@ -0,0 +1,45 @@
+// 
+// Copyright 2021 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 Foundation
+import SwiftUI
+
+/**
+ Using an enum for the screen allows you define the different state cases with
+ the relevant associated data for each case.
+ */
+@available(iOS 14.0, *)
+enum MockTemplateProfileUserScreenStates: MockScreen {
+    
+    case mockPresenceStates(TemplateUserProfilePresence)
+    case mockLongDisplayName(String)
+    
+    static var screenStates: [MockTemplateProfileUserScreenStates] = TemplateUserProfilePresence.allCases.map(MockTemplateProfileUserScreenStates.mockPresenceStates)
+        + [.mockLongDisplayName("Somebody with a super long name we would like to test")]
+    
+    static func screen(for state: MockTemplateProfileUserScreenStates) -> some View {
+        let service: MockTemplateUserProfileService
+        switch state {
+        case .mockPresenceStates(let presence):
+            service = MockTemplateUserProfileService(presence: presence)
+        case .mockLongDisplayName(let displayName):
+            service = MockTemplateUserProfileService(displayName: displayName)
+        }
+        let viewModel = TemplateUserProfileViewModel(userService: service)
+        return TemplateUserProfile(viewModel: viewModel)
+                .addDependency(MockAvatarService.example)
+    }
+}

RiotSwiftUI/Modules/Template/SimpleUserProfileExample/Service/Mock/MockTemplateUserProfileService.swift

@@ -19,20 +19,24 @@ import Combine
 
 @available(iOS 14.0, *)
 class MockTemplateUserProfileService: TemplateUserProfileServiceProtocol {
-
-    static let example = MockTemplateUserProfileService()
-    static let initialPresenceState: TemplateUserProfilePresence = .offline
-    @Published var presence: TemplateUserProfilePresence = initialPresenceState
-    var presencePublisher: AnyPublisher<TemplateUserProfilePresence, Never> {
-        $presence.eraseToAnyPublisher()
+    var presenceSubject: CurrentValueSubject<TemplateUserProfilePresence, Never>
+    
+    let userId: String
+    var displayName: String?
+    let avatarUrl: String?
+    init(
+        userId: String = "123",
+        displayName:  String? = "Alice",
+        avatarUrl: String? = "mx123@matrix.com",
+        presence: TemplateUserProfilePresence = .offline
+    ) {
+        self.userId = userId
+        self.displayName = displayName
+        self.avatarUrl = avatarUrl
+        self.presenceSubject = CurrentValueSubject<TemplateUserProfilePresence, Never>(presence)
     }
-    let userId: String = "123"
-    let displayName: String? = "Alice"
-    let avatarUrl: String? = "mx123@matrix.com"
-    let currentlyActive: Bool = true
-    let lastActive: UInt = 1630596918513
     
     func simulateUpdate(presence: TemplateUserProfilePresence) {
-        self.presence = presence
+        self.presenceSubject.send(presence)
     }
 }