Begin migrating the vm service from a rest-style interface to a json-rpc style interface.

runtime/observatory/test/eval_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 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+import 'test_helper.dart';
+import 'dart:async';
+
+int globalVar = 100;
+
+class MyClass {
+  static int staticVar = 1000;
+
+  static void printValue(int value) {
+    print(value);   // line 16
+  }
+}
+
+void testFunction() {
+  int i = 0;
+  while (true) {
+    if (++i % 100000000 == 0) {
+      MyClass.printValue(10000);
+    }
+  }
+}
+
+var tests = [
+
+// Go to breakpoint at line 16.
+(Isolate isolate) {
+  return isolate.rootLib.load().then((_) {
+      // Set up a listener to wait for breakpoint events.
+      Completer completer = new Completer();
+      List events = [];
+      isolate.vm.events.stream.listen((ServiceEvent event) {
+        if (event.eventType == 'BreakpointReached') {
+          print('Breakpoint reached');
+          completer.complete();
+        }
+      });
+
+      // Add the breakpoint.
+      var script = isolate.rootLib.scripts[0];
+      var line = 16;
+      return isolate.addBreakpoint(script, line).then((ServiceObject bpt) {
+          return completer.future;  // Wait for breakpoint reached.
+      });
+    });
+},
+
+// Evaluate against library, class, and instance.
+(Isolate isolate) {
+  return isolate.getStack().then((ServiceMap stack) {
+      // Make sure we are in the right place.
+      expect(stack.type, equals('Stack'));
+      expect(stack['frames'].length, greaterThanOrEqualTo(2));
+      expect(stack['frames'][0]['function'].name, equals('printValue'));
+      expect(stack['frames'][0]['function'].owningClass.name, equals('MyClass'));
+
+      var lib = isolate.rootLib;
+      var cls = stack['frames'][0]['function'].owningClass;
+      var instance = stack['frames'][0]['vars'][0]['value'];
+
+      List evals = [];
+      evals.add(isolate.eval(lib, 'globalVar + 5').then((result) {
+            print(result);
+            expect(result.valueAsString, equals('105'));
+          }));
+      evals.add(isolate.eval(lib, 'globalVar + staticVar + 5').then((result) {
+            expect(result.type, equals('Error'));
+          }));
+      evals.add(isolate.eval(cls, 'globalVar + staticVar + 5').then((result) {
+            print(result);
+            expect(result.valueAsString, equals('1105'));
+          }));
+      evals.add(isolate.eval(cls, 'this + 5').then((result) {
+            expect(result.type, equals('Error'));
+          }));
+      evals.add(isolate.eval(instance, 'this + 5').then((result) {
+            print(result);
+            expect(result.valueAsString, equals('10005'));
+          }));
+      evals.add(isolate.eval(instance, 'this + frog').then((result) {
+            expect(result.type, equals('Error'));
+          }));
+      return Future.wait(evals);
+  });
+},
+
+];
+
+main(args) => runIsolateTests(args, tests, testeeConcurrent: testFunction);