[flutter_tools] have the tool print the current canvaskit mode when toggling (#52841)

packages/flutter_tools/lib/src/build_runner/resident_web_runner.dart

@@ -706,10 +706,11 @@ class _ResidentWebRunner extends ResidentWebRunner {
   bool get supportsCanvasKit => supportsServiceProtocol;
 
   @override
-  Future<void> toggleCanvaskit() async {
+  Future<bool> toggleCanvaskit() async {
     final WebDevFS webDevFS = device.devFS as WebDevFS;
     webDevFS.webAssetServer.canvasKitRendering = !webDevFS.webAssetServer.canvasKitRendering;
     await _wipConnection?.sendCommand('Page.reload');
+    return webDevFS.webAssetServer.canvasKitRendering;
   }
 
   @override

packages/flutter_tools/lib/src/resident_runner.dart

@@ -732,10 +732,11 @@ abstract class ResidentRunner {
     throw '${fullRestart ? 'Restart' : 'Reload'} is not supported in $mode mode';
   }
 
-  /// Toggle whether canvaskit is being used for rendering.
+  /// Toggle whether canvaskit is being used for rendering, returning the new
+  /// state.
   ///
   /// Only supported on the web.
-  Future<void> toggleCanvaskit() {
+  Future<bool> toggleCanvaskit() {
     throw Exception('Canvaskit not supported by this runner.');
   }
 
@@ -1207,7 +1208,8 @@ class TerminalHandler {
         return false;
       case 'k':
         if (residentRunner.supportsCanvasKit) {
-          await residentRunner.toggleCanvaskit();
+          final bool result = await residentRunner.toggleCanvaskit();
+          globals.printStatus('${result ? 'Enabled' : 'Disabled'} CanvasKit');
           return true;
         }
         return false;

packages/flutter_tools/test/general.shard/resident_web_runner_test.dart

@@ -437,9 +437,10 @@ void main() {
     expect(residentWebRunner.supportsCanvasKit, true);
     expect(webAssetServer.canvasKitRendering, false);
 
-    await residentWebRunner.toggleCanvaskit();
+    final bool toggleResult = await residentWebRunner.toggleCanvaskit();
 
     expect(webAssetServer.canvasKitRendering, true);
+    expect(toggleResult, true);
   }));
 
   test('Exits when initial compile fails', () => testbed.run(() async {

packages/flutter_tools/test/general.shard/terminal_handler_test.dart

@@ -108,6 +108,18 @@ void main() {
       verify(mockResidentRunner.printHelp(details: true)).called(3);
     });
 
+    testUsingContext('k - toggles CanvasKit rendering and prints results', () async {
+      when(mockResidentRunner.supportsCanvasKit).thenReturn(true);
+      when(mockResidentRunner.toggleCanvaskit())
+        .thenAnswer((Invocation invocation) async {
+          return true;
+        });
+
+      await terminalHandler.processTerminalInput('k');
+
+      verify(mockResidentRunner.toggleCanvaskit()).called(1);
+    });
+
     testUsingContext('i, I - debugToggleWidgetInspector with service protocol', () async {
       await terminalHandler.processTerminalInput('i');
       await terminalHandler.processTerminalInput('I');