mobile: Add workaround for Flutter issue #24703

mobile/test_driver/clone_test.dart

@@ -11,6 +11,7 @@ void main() {
     FlutterDriver driver;
     TransactionCheck txcheck;
     String accountId;
+    void Function() unpauseIsolateCleanup;
 
     setUpAll(() async {
       final accounts = await listServerAccounts();
@@ -23,7 +24,7 @@ void main() {
 
       // Connects to the app
       driver = await FlutterDriver.connect();
-      unpauseIsolates(driver);
+      unpauseIsolateCleanup = await unpauseIsolates(driver);
       txcheck = TransactionCheck(driver);
     });
 
@@ -63,6 +64,7 @@ void main() {
     });
 
     tearDownAll(() async {
+      unpauseIsolateCleanup();
       await stopFlouzeServer();
       await disableReversePortForwarding();
 

mobile/test_driver/create_populate_share_test.dart

@@ -10,18 +10,20 @@ void main() {
   group('Create, populate and share an account', () {
     FlutterDriver driver;
     TransactionCheck txcheck;
+    void Function() unpauseIsolateCleanup;
 
     setUpAll(() async {
       await startFlouzeServer(deleteDataFirst: true);
       await enableReversePortForwarding();
 
       // Connects to the app
       driver = await FlutterDriver.connect();
-      unpauseIsolates(driver);
+      unpauseIsolateCleanup = await unpauseIsolates(driver);
       txcheck = TransactionCheck(driver);
     });
 
     tearDownAll(() async {
+      unpauseIsolateCleanup();
       await stopFlouzeServer();
       await disableReversePortForwarding();
 
@@ -193,24 +195,30 @@ void main() {
       // Return to the account list page, where we started
       await pressBackButton();
     });
+    /*
   });
 
   group('Create and delete an account', () {
     FlutterDriver driver;
+    void Function() unpauseIsolateCleanup;
 
     setUpAll(() async {
       await enableReversePortForwarding();
 
       // Connects to the app
       driver = await FlutterDriver.connect();
+      unpauseIsolateCleanup = await unpauseIsolates(driver);
     });
 
     tearDownAll(() async {
+      unpauseIsolateCleanup();
+
       if (driver != null) {
         // Closes the connection
         driver.close();
       }
     });
+   */
 
     test('create an account', () async {
       await driver.waitForAbsent(find.byValueKey('account-list-loading'));

mobile/test_driver/test_utils.dart

@@ -186,20 +186,24 @@ Future<List<Flouze.Transaction>> listServerTransactions(String accountName) {
 }
 
 // Workaround for https://github.com/flutter/flutter/issues/24703
-Future<void> unpauseIsolates(FlutterDriver driver) async {
+Future<void Function()> unpauseIsolates(FlutterDriver driver) async {
   (await driver.serviceClient.getVM()).isolates.forEach((isolateRef) async {
     final isolate = await isolateRef.load();
     if (isolate.isPaused) {
       isolate.resume();
     }
   });
 
-  driver.serviceClient.onIsolateRunnable
+  final sub = driver.serviceClient.onIsolateRunnable
       .asBroadcastStream()
       .listen((isolateRef) async {
     final isolate = await isolateRef.load();
     if (isolate.isPaused) {
       isolate.resume();
     }
   });
+
+  return () {
+    sub.cancel();
+  };
 }