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

runtime/observatory/test/debugging_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';
+
+void testFunction() {
+  int i = 0;
+  while (true) {
+    if (++i % 100000000 == 0) {
+      print(i);   // line 14
+    }
+  }
+}
+
+var tests = [
+
+// Pause
+(Isolate isolate) {
+  Completer completer = new Completer();
+  isolate.vm.events.stream.listen((ServiceEvent event) {
+    if (event.eventType == 'IsolateInterrupted') {
+      completer.complete();
+    }
+  });
+  isolate.pause();
+  return completer.future;
+},
+
+// Resume
+(Isolate isolate) {
+  return isolate.resume().then((_) {
+      expect(isolate.pauseEvent == null, isTrue);
+  });
+},
+
+// Add breakpoint
+(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.startsWith('Breakpoint')) {
+          events.add(event);
+        }
+        if (events.length == 2) {
+          expect(events[0].eventType, equals('BreakpointResolved'));
+          expect(events[1].eventType, equals('BreakpointReached'));
+          print('Breakpoint reached');
+          completer.complete();
+        }
+      });
+
+      // Add the breakpoint.
+      var script = isolate.rootLib.scripts[0];
+      return isolate.addBreakpoint(script, 14).then((ServiceObject bpt) {
+          expect(bpt is ServiceMap, isTrue);
+          ServiceMap m = bpt;
+          expect(m.type, equals('Breakpoint'));
+          expect(m['location']['script'].id, equals(script.id));
+          expect(m['location']['tokenPos'], equals(51));
+          expect(isolate.breakpoints.type, equals('BreakpointList'));
+          expect(isolate.breakpoints['breakpoints'].length, equals(1));
+          return completer.future;  // Wait for breakpoint events.
+      });
+    });
+},
+
+// Get the stack trace
+(Isolate isolate) {
+  return isolate.getStack().then((ServiceMap stack) {
+      expect(stack.type, equals('Stack'));
+      expect(stack['frames'].length, greaterThanOrEqualTo(1));
+      expect(stack['frames'][0]['function'].name, equals('testFunction'));
+  });
+},
+
+// Stepping
+(Isolate isolate) {
+  // 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.startsWith('Breakpoint')) {
+      expect(event.eventType, equals('BreakpointReached'));
+    }
+    print('Breakpoint reached');
+    completer.complete();
+  });
+  
+  return isolate.stepInto().then((isolate) {
+    return completer.future;  // Wait for breakpoint events.
+  });
+},
+
+// Get the stack trace again.  We are in 'print'.
+(Isolate isolate) {
+  return isolate.getStack().then((ServiceMap stack) {
+      expect(stack.type, equals('Stack'));
+      expect(stack['frames'].length, greaterThanOrEqualTo(2));
+      expect(stack['frames'][0]['function'].name, equals('print'));
+  });
+},
+
+// Remove breakpoint
+(Isolate isolate) {
+  expect(isolate.breakpoints['breakpoints'].length, equals(1));
+  var bpt = isolate.breakpoints['breakpoints'][0];
+  return isolate.removeBreakpoint(bpt).then((_) {
+      expect(isolate.breakpoints['breakpoints'].length, equals(0));
+  });
+},
+
+];
+
+main(args) => runIsolateTests(args, tests, testeeConcurrent: testFunction);