Fix/ios run simulator (#20262)

packages/flutter_tools/lib/src/protocol_discovery.dart

@@ -60,7 +60,7 @@ class ProtocolDiscovery {
   void _handleLine(String line) {
     Uri uri;
 
-    final RegExp r = new RegExp('${RegExp.escape(serviceName)} listening on (http://[^ \n]+)');
+    final RegExp r = new RegExp('${RegExp.escape(serviceName)} listening on ((http|\/\/)[a-zA-Z0-9:/=\.\\[\\]]+)');
     final Match match = r.firstMatch(line);
 
     if (match != null) {

packages/flutter_tools/test/protocol_discovery_test.dart

@@ -67,9 +67,9 @@ void main() {
         expect('$uri', 'http://127.0.0.1:3333');
       });
 
-      testUsingContext('discovers uri even if logs has ESC Ascii', () async {
+      testUsingContext('discovers uri with Ascii Esc code', () async {
         initialize();
-        logReader.addLine('Observatory listening on http://127.0.0.1:3333 \x1b[');
+        logReader.addLine('Observatory listening on http://127.0.0.1:3333\x1b[');
         final Uri uri = await discoverer.uri;
         expect(uri.port, 3333);
         expect('$uri', 'http://127.0.0.1:3333');
@@ -89,7 +89,9 @@ void main() {
         logReader.addLine('Observatory not listening...');
         final Uri timeoutUri = Uri.parse('http://timeout');
         final Uri actualUri = await uriFuture.timeout(
-            const Duration(milliseconds: 100), onTimeout: () => timeoutUri);
+          const Duration(milliseconds: 100),
+          onTimeout: () => timeoutUri,
+        );
         expect(actualUri, timeoutUri);
       });
 
@@ -196,6 +198,26 @@ void main() {
         await discoverer.cancel();
         logReader.dispose();
       });
+
+      testUsingContext('ipv6 with Ascii Escape code', () async {
+        final MockDeviceLogReader logReader = new MockDeviceLogReader();
+        final ProtocolDiscovery discoverer = new ProtocolDiscovery.observatory(
+          logReader,
+          portForwarder: new MockPortForwarder(99),
+          hostPort: 54777,
+          ipv6: true,
+        );
+
+        // Get next port future.
+        final Future<Uri> nextUri = discoverer.uri;
+        logReader.addLine('I/flutter : Observatory listening on http://[::1]:54777/PTwjm8Ii8qg=/\x1b[');
+        final Uri uri = await nextUri;
+        expect(uri.port, 54777);
+        expect('$uri', 'http://[::1]:54777/PTwjm8Ii8qg=/');
+
+        discoverer.cancel();
+        logReader.dispose();
+      });
     });
   });
 }
@@ -207,8 +229,9 @@ class MockPortForwarder extends DevicePortForwarder {
   @override
   Future<int> forward(int devicePort, {int hostPort}) async {
     hostPort ??= 0;
-    if (hostPort == 0)
+    if (hostPort == 0) {
       return availablePort;
+    }
     return hostPort;
   }