Update copyright year to 2026 and refactor timestamp values in network tests for clarity. Adjusted start times in various test cases and improved code readability in the HotRestartNetworkVmService class.

Author: muhammadkamel

packages/devtools_app/test/screens/network/network_clear_test.dart

@@ -1,4 +1,4 @@
-// Copyright 2025 The Flutter Authors
+// Copyright 2026 The Flutter Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
@@ -121,7 +121,7 @@ void main() {
           controller
                   .networkService
                   .lastHttpDataRefreshTimePerIsolate[isolateId] =
-              DateTime.now().microsecondsSinceEpoch;
+              500_000;
 
           await controller.clear();
 
@@ -144,7 +144,7 @@ void main() {
             createTestHttpRequest(
               id: 'stale-request',
               method: 'GET',
-              startTime: 1500000,
+              startTime: 1_500_000,
             ),
           ],
         );
@@ -179,7 +179,7 @@ void main() {
           createTestHttpRequest(
             id: 'after-clear-and-restart',
             method: 'PUT',
-            startTime: 9000000,
+            startTime: 9_000_000,
           ),
         );
         await controller.networkService.refreshNetworkData();
@@ -211,7 +211,7 @@ void main() {
           createTestHttpRequest(
             id: 'after-restart',
             method: 'POST',
-            startTime: 8000000,
+            startTime: 8_000_000,
           ),
         );
         await controller.networkService.refreshNetworkData();
@@ -225,7 +225,7 @@ void main() {
           createTestHttpRequest(
             id: 'after-restart-and-clear',
             method: 'DELETE',
-            startTime: 10000000,
+            startTime: 10_000_000,
           ),
         );
         await controller.networkService.refreshNetworkData();
@@ -295,7 +295,7 @@ void main() {
           createTestHttpRequest(
             id: 'after-multi-clear',
             method: 'PATCH',
-            startTime: 3000000,
+            startTime: 3_000_000,
           ),
         );
         await controller.networkService.refreshNetworkData();

packages/devtools_app/test/screens/network/network_hot_restart_test.dart

@@ -1,4 +1,4 @@
-// Copyright 2025 The Flutter Authors
+// Copyright 2026 The Flutter Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
@@ -83,7 +83,7 @@ void main() {
             createTestHttpRequest(
               id: 'post-restart',
               method: 'POST',
-              startTime: 8000000,
+              startTime: 8_000_000,
             ),
           ]);
 
@@ -187,7 +187,7 @@ void main() {
             createTestHttpRequest(
               id: 'new-isolate-request',
               method: 'PUT',
-              startTime: 9000000,
+              startTime: 9_000_000,
             ),
           ]);
 
@@ -224,15 +224,15 @@ void main() {
           controller
                   .networkService
                   .lastHttpDataRefreshTimePerIsolate[preRestartIsolateId] =
-              DateTime.now().microsecondsSinceEpoch;
+              12_000_000;
 
           final postRestartIsolateId = vmService.simulateHotRestart();
           notifyMainIsolateChanged(fakeServiceConnection, postRestartIsolateId);
           vmService.setHttpProfile(postRestartIsolateId, [
             createTestHttpRequest(
               id: 'after-stale-isolate',
               method: 'DELETE',
-              startTime: 10000000,
+              startTime: 10_000_000,
             ),
           ]);
           await pumpEventQueue();
@@ -266,7 +266,7 @@ void main() {
           createTestHttpRequest(
             id: 'new-request',
             method: 'POST',
-            startTime: 11000000,
+            startTime: 11_000_000,
           ),
         ]);
         await pumpEventQueue();

packages/devtools_app/test/screens/network/utils/hot_restart_network_vm_service.dart

@@ -1,4 +1,4 @@
-// Copyright 2025 The Flutter Authors
+// Copyright 2026 The Flutter Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
@@ -40,11 +40,24 @@ class HotRestartNetworkVmService extends FakeVmServiceWrapper {
   static final _testVmFlagManager = VmFlagManager();
 
   String _currentIsolateId = 'isolates/1';
-  int _timelineMicros = 1000000;
 
+  /// A monotonic microsecond counter simulating the VM timeline clock.
+  int _timelineMicros = 1_000_000;
+
+  /// A map of isolate ID to the list of mock HTTP requests recorded on that
+  /// isolate.
   final _httpProfiles = <String, List<HttpProfileRequest>>{};
+
+  /// A map of isolate ID to the list of mock socket statistics recorded on that
+  /// isolate.
   final _socketProfiles = <String, List<SocketStatistic>>{};
+
+  /// A map tracking whether HTTP timeline logging is enabled (true/false) per
+  /// isolate ID.
   final _httpLoggingEnabled = <String, bool>{};
+
+  /// A map tracking whether socket profiling is enabled (true/false) per isolate
+  /// ID.
   final _socketProfilingEnabled = <String, bool>{};
 
   /// The isolate ID currently returned by [forEachIsolate].
@@ -79,28 +92,27 @@ class HotRestartNetworkVmService extends FakeVmServiceWrapper {
     _currentIsolateId = nextId;
     _httpLoggingEnabled[nextId] = false;
     _socketProfilingEnabled[nextId] = false;
-    _timelineMicros += 5000000;
+    // Advance past pre-restart request timestamps so refresh logic treats them
+    // as stale on the new isolate.
+    _timelineMicros += 5_000_000;
     return nextId;
   }
 
   /// Appends [request] to the HTTP profile for [isolateId].
   void appendHttpRequest(String isolateId, HttpProfileRequest request) {
-    _httpProfiles[isolateId] = [
-      ...(_httpProfiles[isolateId] ?? const []),
-      request,
-    ];
+    _httpProfiles[isolateId] = [...?_httpProfiles[isolateId], request];
   }
 
   @override
-  Future<Success> clearHttpProfileWrapper(String isolateId) {
+  Future<Success> clearHttpProfileWrapper(String isolateId) async {
     _httpProfiles[isolateId] = [];
-    return Future.value(Success());
+    return Success();
   }
 
   @override
-  Future<Success> clearSocketProfileWrapper(String isolateId) {
+  Future<Success> clearSocketProfileWrapper(String isolateId) async {
     _socketProfiles[isolateId] = [];
-    return Future.value(Success());
+    return Success();
   }
 
   @override
@@ -111,45 +123,39 @@ class HotRestartNetworkVmService extends FakeVmServiceWrapper {
   Future<HttpTimelineLoggingState> httpEnableTimelineLoggingWrapper(
     String isolateId, [
     bool? enabled,
-  ]) {
+  ]) async {
     if (enabled != null) {
       _httpLoggingEnabled[isolateId] = enabled;
-      return Future.value(HttpTimelineLoggingState(enabled: enabled));
+      return HttpTimelineLoggingState(enabled: enabled);
     }
-    return Future.value(
-      HttpTimelineLoggingState(
-        enabled: _httpLoggingEnabled[isolateId] ?? false,
-      ),
+    return HttpTimelineLoggingState(
+      enabled: _httpLoggingEnabled[isolateId] ?? false,
     );
   }
 
   @override
   Future<SocketProfilingState> socketProfilingEnabledWrapper(
     String isolateId, [
     bool? enabled,
-  ]) {
+  ]) async {
     if (enabled != null) {
       _socketProfilingEnabled[isolateId] = enabled;
-      return Future.value(SocketProfilingState(enabled: enabled));
+      return SocketProfilingState(enabled: enabled);
     }
-    return Future.value(
-      SocketProfilingState(
-        enabled: _socketProfilingEnabled[isolateId] ?? false,
-      ),
+    return SocketProfilingState(
+      enabled: _socketProfilingEnabled[isolateId] ?? false,
     );
   }
 
   @override
   Future<HttpProfile> getHttpProfileWrapper(
     String isolateId, {
     DateTime? updatedSince,
-  }) {
+  }) async {
     if (!(_httpLoggingEnabled[isolateId] ?? false)) {
-      return Future.value(
-        HttpProfile(
-          requests: [],
-          timestamp: DateTime.fromMicrosecondsSinceEpoch(_timelineMicros),
-        ),
+      return HttpProfile(
+        requests: [],
+        timestamp: DateTime.fromMicrosecondsSinceEpoch(_timelineMicros),
       );
     }
 
@@ -165,25 +171,21 @@ class HotRestartNetworkVmService extends FakeVmServiceWrapper {
           )
           .toList();
     }
-    return Future.value(
-      HttpProfile(
-        requests: requests,
-        timestamp: DateTime.fromMicrosecondsSinceEpoch(_timelineMicros),
-      ),
+    return HttpProfile(
+      requests: requests,
+      timestamp: DateTime.fromMicrosecondsSinceEpoch(_timelineMicros),
     );
   }
 
   @override
-  Future<SocketProfile> getSocketProfileWrapper(String isolateId) {
+  Future<SocketProfile> getSocketProfileWrapper(String isolateId) async {
     if (!(_socketProfilingEnabled[isolateId] ?? false)) {
-      return Future.value(SocketProfile(sockets: []));
+      return SocketProfile(sockets: []);
     }
-    return Future.value(
-      SocketProfile(sockets: _socketProfiles[isolateId] ?? const []),
-    );
+    return SocketProfile(sockets: _socketProfiles[isolateId] ?? const []);
   }
 
   @override
-  Future<Timestamp> getVMTimelineMicros() =>
-      Future.value(Timestamp(timestamp: _timelineMicros));
+  Future<Timestamp> getVMTimelineMicros() async =>
+      Timestamp(timestamp: _timelineMicros);
 }

packages/devtools_app/test/screens/network/utils/network_lifecycle_test_utils.dart

@@ -1,4 +1,4 @@
-// Copyright 2025 The Flutter Authors
+// Copyright 2026 The Flutter Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 

packages/devtools_app/test/screens/network/utils/network_test_utils.dart

@@ -10,7 +10,7 @@ import '../../../test_infra/test_data/network.dart';
 HttpProfileRequest createTestHttpRequest({
   required String id,
   required String method,
-  int startTime = 2000000,
+  int startTime = 2_000_000,
   String uri = 'https://example.com/test',
 }) {
   final endTime = startTime + 1000;