Add PollHistory view model UTs

RiotSwiftUI/Modules/Room/PollHistory/Test/UI/PollHistoryUITests.swift

@@ -17,7 +17,7 @@
 import RiotSwiftUI
 import XCTest
 
-class PollHistoryUITests: MockScreenTestCase {
+final class PollHistoryUITests: MockScreenTestCase {
     func testActivePollHistoryHasContent() {
         app.goToScreenWithIdentifier(MockPollHistoryScreenState.active.title)
         let title = app.navigationBars.firstMatch.identifier
@@ -65,4 +65,15 @@ class PollHistoryUITests: MockScreenTestCase {
         XCTAssertEqual(selectedSegment.value as? String, VectorL10n.accessibilitySelected)
         XCTAssertFalse(winningOption.exists)
     }
+    
+    func testLoaderIsShowing() {
+        app.goToScreenWithIdentifier(MockPollHistoryScreenState.loading.title)
+        let title = app.navigationBars.firstMatch.identifier
+        let loadingText = app.staticTexts["PollHistory.loadingText"]
+        let items = app.staticTexts["PollListItem.title"]
+        
+        XCTAssertEqual(title, VectorL10n.pollHistoryTitle)
+        XCTAssertFalse(items.exists)
+        XCTAssertTrue(loadingText.exists)
+    }
 }

RiotSwiftUI/Modules/Room/PollHistory/Test/Unit/PollHistoryViewModelTests.swift

@@ -0,0 +1,90 @@
+// 
+// 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 RiotSwiftUI
+import XCTest
+
+final class PollHistoryViewModelTests: XCTestCase {
+    private var viewModel: PollHistoryViewModel!
+    private var pollHistoryService: MockPollHistoryService = .init()
+
+    override func setUpWithError() throws {
+        pollHistoryService = .init()
+        viewModel = .init(mode: .active, pollService: pollHistoryService)
+    }
+
+    func testEmitsContentOnLanding() throws {
+        XCTAssert(viewModel.state.polls == nil)
+        viewModel.process(viewAction: .viewAppeared)
+        XCTAssertFalse(try polls.isEmpty)
+    }
+    
+    func testLoadingState() throws {
+        XCTAssertFalse(viewModel.state.isLoading)
+        viewModel.process(viewAction: .viewAppeared)
+        XCTAssertFalse(viewModel.state.isLoading)
+        XCTAssertFalse(try polls.isEmpty)
+    }
+    
+    func testLoadingStateIsTrueWhileLoading() {
+        XCTAssertFalse(viewModel.state.isLoading)
+        pollHistoryService.nextPublisher = Empty(completeImmediately: false, outputType: TimelinePollDetails.self, failureType: Error.self).eraseToAnyPublisher()
+        viewModel.process(viewAction: .viewAppeared)
+        XCTAssertTrue(viewModel.state.isLoading)
+    }
+    
+    func testUpdatesAreHandled() throws {
+        let mockUpdates: PassthroughSubject<TimelinePollDetails, Never> = .init()
+        pollHistoryService.updatesPublisher = mockUpdates.eraseToAnyPublisher()
+        viewModel.process(viewAction: .viewAppeared)
+        
+        var firstPoll = try XCTUnwrap(try polls.first)
+        XCTAssertEqual(firstPoll.question, "Do you like the active poll number 9?")
+        firstPoll.question = "foo"
+        
+        mockUpdates.send(firstPoll)
+        
+        let updatedPoll = try XCTUnwrap(viewModel.state.polls?.first)
+        XCTAssertEqual(updatedPoll.question, "foo")
+    }
+    
+    func testSegmentsAreUpdated() throws {
+        viewModel.process(viewAction: .viewAppeared)
+        XCTAssertFalse(try polls.isEmpty)
+        XCTAssertTrue(try polls.allSatisfy { !$0.closed })
+        
+        viewModel.state.bindings.mode = .past
+        viewModel.process(viewAction: .segmentDidChange)
+        
+        XCTAssertTrue(try polls.allSatisfy(\.closed))
+    }
+    
+    func testPollsAreReverseOrdered() throws {
+        viewModel.process(viewAction: .viewAppeared)
+        
+        let pollDates = try polls.map(\.startDate)
+        XCTAssertEqual(pollDates, pollDates.sorted(by: { $0 > $1 }))
+    }
+}
+
+private extension PollHistoryViewModelTests {
+    var polls: [TimelinePollDetails] {
+        get throws {
+            try XCTUnwrap(viewModel.state.polls)
+        }
+    }
+}