Introduce mock SDK timeline items and a live, lorem ipsum based, timeline provider

ElementX/Sources/Mocks/RoomProxyMock.swift

@@ -39,16 +39,7 @@ struct RoomProxyMockConfiguration {
     var canUserTriggerRoomNotification = false
     var canUserJoinCall = true
     
-    func makeTimeline() -> TimelineProxyMock {
-        let timeline = TimelineProxyMock()
-        timeline.sendMessageEventContentReturnValue = .success(())
-        
-        let timelineProvider = RoomTimelineProviderMock()
-        timelineProvider.paginationState = .init(backward: timelineStartReached ? .timelineEndReached : .idle, forward: .timelineEndReached)
-        timelineProvider.underlyingMembershipChangePublisher = PassthroughSubject().eraseToAnyPublisher()
-        timeline.underlyingTimelineProvider = timelineProvider
-        return timeline
-    }
+    var shouldUseAutoUpdatingTimeline = false
 }
 
 enum RoomProxyMockError: Error {
@@ -71,8 +62,23 @@ extension RoomProxyMock {
         hasOngoingCall = configuration.hasOngoingCall
         canonicalAlias = configuration.canonicalAlias
         
-        timeline = configuration.makeTimeline()
+        let timeline = TimelineProxyMock()
+        timeline.sendMessageEventContentReturnValue = .success(())
+        timeline.paginateBackwardsRequestSizeReturnValue = .success(())
+        timeline.paginateForwardsRequestSizeReturnValue = .success(())
+        timeline.sendReadReceiptForTypeReturnValue = .success(())
         
+        if configuration.shouldUseAutoUpdatingTimeline {
+            timeline.underlyingTimelineProvider = AutoUpdatingRoomTimelineProviderMock()
+        } else {
+            let timelineProvider = RoomTimelineProviderMock()
+            timelineProvider.paginationState = .init(backward: configuration.timelineStartReached ? .timelineEndReached : .idle, forward: .timelineEndReached)
+            timelineProvider.underlyingMembershipChangePublisher = PassthroughSubject().eraseToAnyPublisher()
+            timeline.underlyingTimelineProvider = timelineProvider
+        }
+        
+        self.timeline = timeline
+
         ownUserID = configuration.ownUserID
         membership = .joined
         

ElementX/Sources/Mocks/RoomTimelineControllerFactoryMock.swift

@@ -17,7 +17,7 @@
 import Foundation
 
 struct RoomTimelineControllerFactoryMockConfiguration {
-    var timelineController: MockRoomTimelineController?
+    var timelineController: RoomTimelineControllerProtocol?
 }
 
 extension RoomTimelineControllerFactoryMock {

ElementX/Sources/Mocks/RoomTimelineProviderMock.swift

@@ -0,0 +1,48 @@
+//
+// Copyright 2024 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
+import Foundation
+import MatrixRustSDK
+
+@MainActor
+class AutoUpdatingRoomTimelineProviderMock: RoomTimelineProvider {
+    private let innerUpdatePublisher: PassthroughSubject<[TimelineDiff], Never>
+    private let innerPaginationStatePublisher: PassthroughSubject<PaginationState, Never>
+    private let innerItems: [TimelineItemProxy] = []
+    
+    init() {
+        innerUpdatePublisher = .init()
+        innerPaginationStatePublisher = .init()
+        
+        super.init(currentItems: [],
+                   isLive: true,
+                   updatePublisher: innerUpdatePublisher.eraseToAnyPublisher(),
+                   paginationStatePublisher: innerPaginationStatePublisher.eraseToAnyPublisher())
+        
+        Task.detached { [weak self] in
+            for _ in 0...100 {
+                try? await Task.sleep(for: .seconds(1))
+                
+                let diff = TimelineDiffSDKMock()
+                diff.changeReturnValue = .append
+                diff.appendReturnValue = [TimelineItemFixtures.messageTimelineItem]
+                
+                self?.innerUpdatePublisher.send([diff])
+            }
+        }
+    }
+}

ElementX/Sources/Mocks/TimelineItemMock.swift

@@ -0,0 +1,75 @@
+//
+// Copyright 2024 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
+import Foundation
+import LoremSwiftum
+import MatrixRustSDK
+
+enum TimelineItemFixtures {
+    static var callInviteTimelineItem: TimelineItem {
+        let eventTimelineItem = EventTimelineItemSDKMock()
+        eventTimelineItem.isOwnReturnValue = true
+        eventTimelineItem.timestampReturnValue = 0
+        eventTimelineItem.isEditableReturnValue = false
+        eventTimelineItem.canBeRepliedToReturnValue = false
+        eventTimelineItem.senderReturnValue = "@bob:matrix.org"
+        eventTimelineItem.senderProfileReturnValue = .pending
+        
+        let timelineItemContent = TimelineItemContentSDKMock()
+        timelineItemContent.kindReturnValue = .callInvite
+        eventTimelineItem.contentReturnValue = timelineItemContent
+        
+        let timelineItem = TimelineItemSDKMock()
+        timelineItem.asEventReturnValue = eventTimelineItem
+        
+        return timelineItem
+    }
+    
+    static var messageTimelineItem: TimelineItem {
+        let eventTimelineItem = EventTimelineItemSDKMock()
+        eventTimelineItem.eventIdReturnValue = UUID().uuidString
+        eventTimelineItem.isOwnReturnValue = true
+        eventTimelineItem.timestampReturnValue = 0
+        eventTimelineItem.isEditableReturnValue = false
+        eventTimelineItem.canBeRepliedToReturnValue = false
+        eventTimelineItem.senderReturnValue = "@bob:matrix.org"
+        eventTimelineItem.senderProfileReturnValue = .pending
+        eventTimelineItem.reactionsReturnValue = []
+        eventTimelineItem.readReceiptsReturnValue = [:]
+        
+        let timelineItemContent = TimelineItemContentSDKMock()
+        
+        timelineItemContent.kindReturnValue = .message
+            
+        let message = MessageSDKMock()
+        
+        let textMessageContent = TextMessageContent(body: Lorem.sentences(Int.random(in: 1...5)), formatted: nil)
+        message.msgtypeReturnValue = .text(content: textMessageContent)
+        message.isThreadedReturnValue = false
+        message.isEditedReturnValue = false
+        
+        timelineItemContent.asMessageReturnValue = message
+        
+        eventTimelineItem.contentReturnValue = timelineItemContent
+        
+        let timelineItem = TimelineItemSDKMock()
+        timelineItem.asEventReturnValue = eventTimelineItem
+        timelineItem.uniqueIdReturnValue = UUID().uuidString
+        
+        return timelineItem
+    }
+}