Fix reuseApplication when ws URI does not end with `/` (#82066)

packages/flutter_tools/lib/src/drive/drive_service.dart

@@ -198,7 +198,9 @@ class FlutterDriverService extends DriverService {
   ) async {
     Uri uri;
     if (vmServiceUri.scheme == 'ws') {
-      uri = vmServiceUri.replace(scheme: 'http', path: vmServiceUri.path.replaceFirst('ws/', ''));
+      final List<String> segments = vmServiceUri.pathSegments.toList();
+      segments.remove('ws');
+      uri = vmServiceUri.replace(scheme: 'http', path: segments.join('/'));
     } else {
       uri = vmServiceUri;
     }

packages/flutter_tools/test/general.shard/drive/drive_service_test.dart

@@ -354,6 +354,53 @@ void main() {
     await driverService.stop();
   });
 
+  testWithoutContext('Can connect to existing application using ws URI (no trailing slash)', () async {
+    final FakeVmServiceHost fakeVmServiceHost = FakeVmServiceHost(requests: <FakeVmServiceRequest>[
+      getVM,
+      getVM,
+      const FakeVmServiceRequest(
+        method: 'ext.flutter.exit',
+        args: <String, Object>{
+          'isolateId': '1',
+        }
+      )
+    ]);
+    final FakeProcessManager processManager = FakeProcessManager.empty();
+    final DriverService driverService = setUpDriverService(processManager: processManager, vmService: fakeVmServiceHost.vmService);
+    final FakeDevice device = FakeDevice(LaunchResult.failed());
+
+    await driverService.reuseApplication(
+      Uri.parse('ws://127.0.0.1:63426/1UasC_ihpXY=/ws'),
+      device,
+      DebuggingOptions.enabled(BuildInfo.debug),
+      false,
+    );
+    await driverService.stop();
+  });
+
+  testWithoutContext('Can connect to existing application using ws URI (no trailing slash, ws in auth code)', () async {
+    final FakeVmServiceHost fakeVmServiceHost = FakeVmServiceHost(requests: <FakeVmServiceRequest>[
+      getVM,
+      getVM,
+      const FakeVmServiceRequest(
+        method: 'ext.flutter.exit',
+        args: <String, Object>{
+          'isolateId': '1',
+        }
+      )
+    ]);
+    final FakeProcessManager processManager = FakeProcessManager.empty();
+    final DriverService driverService = setUpDriverService(processManager: processManager, vmService: fakeVmServiceHost.vmService);
+    final FakeDevice device = FakeDevice(LaunchResult.failed());
+
+    await driverService.reuseApplication(
+      Uri.parse('ws://127.0.0.1:63426/wsasC_ihpXY=/ws'),
+      device,
+      DebuggingOptions.enabled(BuildInfo.debug),
+      false,
+    );
+    await driverService.stop();
+  });
 
   testWithoutContext('Does not call flutterExit on device types that do not support it', () async {
     final FakeVmServiceHost fakeVmServiceHost = FakeVmServiceHost(requests: <FakeVmServiceRequest>[
@@ -401,6 +448,9 @@ FlutterDriverService setUpDriverService({
       if (httpUri.scheme != 'http') {
         fail('Expected an HTTP scheme, found $httpUri');
       }
+      if (httpUri.path.endsWith('/ws')) {
+        fail('Expected HTTP uri to not contain `/ws`, found $httpUri');
+      }
       return vmService;
     }
   );