Stabilize integration flakes across debugger, network, console, and wasm teardown

Author: rishika0212

packages/devtools_app/integration_test/test/live_connection/debugger_panel_test.dart

@@ -69,11 +69,17 @@ void main() {
     logStatus('looking for line 55');
 
     // Look for the line 55 gutter item:
-    final gutter55Finder = findGutterItemWithText('55');
+    final gutter55Finder = await retryUntilFound(
+      findGutterItemWithText('55'),
+      tester: tester,
+    );
     expect(gutter55Finder, findsOneWidget);
 
     // Look for the line 55 line item:
-    final line55Finder = findLineItemWithText("print('Hello!');");
+    final line55Finder = await retryUntilFound(
+      findLineItemWithText("print('Hello!');"),
+      tester: tester,
+    );
     expect(line55Finder, findsOneWidget);
 
     await tester.pumpAndSettle(safePumpDuration);
@@ -102,11 +108,17 @@ void main() {
     logStatus('looking for line 28');
 
     // Look for the line 30 gutter item:
-    final gutter28Finder = findGutterItemWithText('28');
+    final gutter28Finder = await retryUntilFound(
+      findGutterItemWithText('28'),
+      tester: tester,
+    );
     expect(gutter28Finder, findsOneWidget);
 
     // Look for the line 28 line item:
-    final line28Finder = findLineItemWithText('count++;');
+    final line28Finder = await retryUntilFound(
+      findLineItemWithText('count++;'),
+      tester: tester,
+    );
     expect(line28Finder, findsOneWidget);
 
     // Verify that the gutter item and line item are aligned:
@@ -162,11 +174,17 @@ void main() {
     logStatus('looking for the focused line');
 
     // Look for the line 46 gutter item:
-    final gutter46Finder = findGutterItemWithText('46');
+    final gutter46Finder = await retryUntilFound(
+      findGutterItemWithText('46'),
+      tester: tester,
+    );
     expect(gutter46Finder, findsOneWidget);
 
     // Look for the line 46 line item:
-    final line46Finder = findLineItemWithText('_action();');
+    final line46Finder = await retryUntilFound(
+      findLineItemWithText('_action();'),
+      tester: tester,
+    );
     expect(line46Finder, findsOneWidget);
 
     // Verify that the gutter item and line item are aligned:

packages/devtools_app/integration_test/test/live_connection/network_screen_test.dart

@@ -100,13 +100,19 @@ final class _NetworkScreenHelper {
   final WidgetTester _tester;
 
   Future<void> clear() async {
+    final controller = screenControllers.lookup<NetworkController>();
+
+    // Pause polling to avoid immediately repopulating rows after clear.
+    await controller.togglePolling(false);
+
     // Press the 'Clear' button between tests.
     await _tester.tap(find.text('Clear'));
+    await _tester.pumpAndSettle(safePumpDuration);
+
+    await controller.togglePolling(true);
     await _tester.pump(safePumpDuration);
-    expect(
-      screenControllers.lookup<NetworkController>().requests.value,
-      isEmpty,
-    );
+
+    expect(controller.requests.value, isEmpty);
   }
 
   Future<void> triggerExit() async {

packages/devtools_app/lib/src/shared/console/console.dart

@@ -166,7 +166,7 @@ class _ConsoleOutputState extends State<_ConsoleOutput>
         padding: const EdgeInsets.symmetric(horizontal: denseSpacing),
         child: SelectionArea(
           child: Column(
-            mainAxisSize: MainAxisSize.min,
+            mainAxisSize: MainAxisSize.max,
             children: [
               Expanded(
                 child: ListView.separated(

packages/devtools_app_shared/lib/src/service/eval_on_dart_library.dart

@@ -609,13 +609,23 @@ class EvalOnDartLibrary extends DisposableController
     int? count,
   }) {
     return addRequest<T>(isAlive, () async {
-      final T value = await service.getObject(
-        _isolateRef!.id!,
-        instance.id!,
-        offset: offset,
-        count: count,
-      ) as T;
-      return value;
+      try {
+        final T value = await service.getObject(
+          _isolateRef!.id!,
+          instance.id!,
+          offset: offset,
+          count: count,
+        ) as T;
+        return value;
+      } on RPCError catch (e, st) {
+        // During teardown (especially on web/wasm), object references can be
+        // invalidated before queued getObject requests complete.
+        if (e.code == RPCErrorKind.kInvalidParams.code) {
+          _log.info('Ignoring stale getObject for ${instance.id}: $e', e, st);
+          return null;
+        }
+        rethrow;
+      }
     });
   }
 }