add sendRequest to VMIsolateRef

test/isolate_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 
 import 'package:async/async.dart';
 import 'package:test/test.dart';
 import 'package:vm_service_client/vm_service_client.dart';
 
@@ skipping 147 matching lines @@
           try {
             await other.load();
           } on VMSentinelException catch (_) {
             break;
           }
         }
 
         expect(other.onExit, completes);
       });
     });
+
+    test("onServiceExtensionAdded fires when an extension is added", () async {
+      client = await runAndConnect(main: """
+        registerExtension('ext.test', (_, __) {});
+      """, flags: ["--pause-isolates-on-start"]);
+
+      var isolate = await (await client.getVM()).isolates.first.loadRunnable();
+      await isolate.waitUntilPaused();
+      await isolate.resume();
+
+      VMServiceExtension ext = await isolate.onServiceExtensionAdded.first;
+      expect(ext.method, 'ext.test');
+    });
   });
 
   group("loadRunnable", () {
     test("for an unrunnable isolate", () async {
       client = await runAndConnect(flags: ["--pause-isolates-on-start"]);
 
       var isolate = (await client.getVM()).isolates.first;
       expect(isolate, isNot(new isInstanceOf<VMRunnableIsolate>()));
 
       isolate = await isolate.loadRunnable();
@@ skipping 190 matching lines @@
     test("works before the isolate is runnable", () async {
       client = await runAndConnect(flags: ['--pause-isolates-on-start']);
 
       // We should be able to set a breakpoint before the relevant library is
       // loaded, although it may fail to resolve if the line number is bogus.
       var isolate = (await client.getVM()).isolates.first;
       var breakpoint = await isolate.addBreakpoint('my/script.dart', 0);
       expect(breakpoint.number, equals(1));
     });
   });
+
+  group("invokeExtension", () {
+    test("enforces ext. prefix", () async {
+      var client = await runAndConnect();
+      var isolate = await (await client.getVM()).isolates.first.loadRunnable();
+      expect(() => isolate.invokeExtension('noprefix'), throwsArgumentError);
+    });
+
+    test("forwards to scope", () async {
+      var client = await runAndConnect(main: r"""
+        registerExtension('ext.ping', (_, __) async {
+          return new ServiceExtensionResponse.result('{"type": "pong"}');
+        });
+      """);
+
+      var isolate = await (await client.getVM()).isolates.first.loadRunnable();
+      var response = await isolate.invokeExtension('ext.ping');
+      expect(response, {'type': 'pong'});
+    });
+
+    test("passes parameters", () async {
+      var client = await runAndConnect(main: r"""
+        registerExtension('ext.params', (_, params) async {
+          return new ServiceExtensionResponse.result('''{
+            "foo": "${params['foo']}"
+          }''');
+        });
+      """);
+
+      var isolate = await (await client.getVM()).isolates.first.loadRunnable();
+      var response = await isolate.invokeExtension('ext.params', {
+        'foo': 'bar',
+      });
+      expect(response, {
+        'foo': 'bar',
+      });
+    });
+  });
 }
 
 /// Starts a client with two unpaused empty isolates.
 Future<List<VMRunnableIsolate>> _twoIsolates() async {
   client = await runAndConnect(topLevel: r"""
     void otherIsolate(_) {}
   """, main: r"""
     Isolate.spawn(otherIsolate, null);
   """, flags: ["--pause-isolates-on-start", "--pause-isolates-on-exit"]);
 
   var vm = await client.getVM();
   var main = vm.isolates.first;
 
   var otherFuture = client.onIsolateRunnable.first;
   await main.resume();
   var other = await otherFuture;
   await other.resume();
 
   return [main, other];
 }