Add local variable declaration token position to service protocol

runtime/observatory/tests/service/local_variable_declaration_test.dart

+// Copyright (c) 2016, 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.
+// VMOptions=--error_on_bad_type --error_on_bad_override  --verbose_debug
+
+import 'package:observatory/service_io.dart';
+import 'package:unittest/unittest.dart';
+import 'service_test_common.dart';
+import 'test_helper.dart';
+import 'dart:developer';
+
+testParameters(int jjjj, int oooo, [int hhhh, int nnnn]) {
+  debugger();
+}
+
+testMain() {
+  int xxx, yyyy, zzzzz;
+  for (int i = 0; i < 1; i++) {
+    var foo = () {
+    };
+    debugger();
+  }
+  var bar = () {
+    print(xxx);
+    print(yyyy);
+    debugger();

[rmacnak, 2016/10/14 23:10:38]

In Dart, a variable is not in scope during its initialization. Maybe also check
'bar' is not in scope here.

+  };
+  bar();
+  testParameters(0, 0);
+}
+
+var tests = [
+  hasStoppedAtBreakpoint,
+  stoppedInFunction('testMain'),
+  (Isolate isolate) async {
+    var stack = await isolate.getStack();
+    expect(stack.type, equals('Stack'));
+    expect(stack['frames'].length, greaterThanOrEqualTo(1));
+    // Grab the top frame.
+    Frame frame = stack['frames'][0];
+    // Grab the script.
+    Script script = frame.location.script;
+    await script.load();
+
+    // Ensure that the token at each declaration position is the name of the
+    // variable.
+    for (var variable in frame.variables) {
+      final int declarationTokenPos = variable['declarationTokenPos'];
+      final String name = variable['name'];
+      final String token = script.getToken(declarationTokenPos);
+      expect(name, token);
+    }
+  },
+  resumeIsolate,
+  hasStoppedAtBreakpoint,
+  // We have stopped in the anonymous closure assigned to bar. Verify that
+  // variables captured in the context have valid declaration positions.
+  (Isolate isolate) async  {
+    var stack = await isolate.getStack();
+    expect(stack.type, equals('Stack'));
+    expect(stack['frames'].length, greaterThanOrEqualTo(1));
+    // Grab the top frame.
+    Frame frame = stack['frames'][0];
+    // Grab the script.
+    Script script = frame.location.script;
+    await script.load();
+    print(frame);
+    expect(frame.variables.length, greaterThanOrEqualTo(1));
+    for (var variable in frame.variables) {
+      final int declarationTokenPos = variable['declarationTokenPos'];
+      final String name = variable['name'];
+      final String token = script.getToken(declarationTokenPos);
+      expect(name, token);
+    }
+  },
+  resumeIsolate,
+  hasStoppedAtBreakpoint,
+  stoppedInFunction('testParameters'),
+  (Isolate isolate) async {
+    var stack = await isolate.getStack();
+    expect(stack.type, equals('Stack'));
+    expect(stack['frames'].length, greaterThanOrEqualTo(1));
+    // Grab the top frame.
+    Frame frame = stack['frames'][0];
+    // Grab the script.
+    Script script = frame.location.script;
+    await script.load();
+
+    // Ensure that the token at each declaration position is the name of the
+    // variable.
+    expect(frame.variables.length, greaterThanOrEqualTo(1));
+    for (var variable in frame.variables) {
+      final int declarationTokenPos = variable['declarationTokenPos'];
+      final String name = variable['name'];
+      final String token = script.getToken(declarationTokenPos);
+      expect(name, token);
+    }
+  }
+];
+
+main(args) => runIsolateTests(args, tests, testeeConcurrent: testMain);