Device Manager: Rename Session (#6826)

* Publish the user sessions overview data.
* Add UserSessionName screen.
* Update logout action to match Figma more closely.

RiotSwiftUI/Modules/UserSessions/UserSessionName/Test/Unit/UserSessionNameViewModelTests.swift

@@ -0,0 +1,51 @@
+//
+// 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 XCTest
+
+@testable import RiotSwiftUI
+
+class UserSessionNameViewModelTests: XCTestCase {
+    var viewModel: UserSessionNameViewModelProtocol!
+    var context: UserSessionNameViewModelType.Context!
+    
+    override func setUpWithError() throws {
+        viewModel = UserSessionNameViewModel(sessionInfo: .mockPhone)
+        context = viewModel.context
+    }
+
+    func testClearingName() {
+        // Given an unedited name.
+        XCTAssertFalse(context.viewState.canUpdateName, "The done button should be disabled when the name hasn't changed.")
+        
+        // When clearing the name.
+        context.sessionName = ""
+        
+        // Then the done button should remain be disabled.
+        XCTAssertFalse(context.viewState.canUpdateName, "The done button should be disabled when the name is empty.")
+    }
+    
+    func testChangingName() {
+        // Given an unedited name.
+        XCTAssertFalse(context.viewState.canUpdateName, "The done button should be disabled when the name hasn't changed.")
+        
+        // When changing the name.
+        context.sessionName = "Alice's iPhone"
+        
+        // Then the done button should be enabled.
+        XCTAssertTrue(context.viewState.canUpdateName, "The done button should be enabled when the name has been changed.")
+    }
+}