JSON string decoding for VM debugger

runtime/vm/debugger_api_impl_test.cc

 // Copyright (c) 2012, 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.
 
 #include "include/dart_debugger_api.h"
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/thread.h"
 #include "vm/unit_test.h"
 
@@ skipping 1508 matching lines @@
   breakpoint_hit_counter++;
 }
 
 
 TEST_CASE(Debug_EvaluateExpr) {
   const char* kScriptChars =
       "import 'dart:math';               \n"
       "main() {                          \n"
       "  var p = new Point(3, 4);        \n"
       "  l = [1, 2, 3];        /*BP*/    \n"
+      "  m = {'\"': 'quote' ,            \n"
+      "       \"\t\": 'tab' };           \n"
       "  return p;                       \n"
       "}                                 \n"
       "var _factor = 2;                  \n"
       "var l;                            \n"
+      "var m;                            \n"
       "class Point {                     \n"
       "  var x, y;                       \n"
       "  Point(this.x, this.y);          \n"
       "}                                 \n";
 
   LoadScript(kScriptChars);
   Dart_SetPausedEventHandler(&TestEvaluateHandler);
 
 
   Dart_Handle script_url = NewString(TestCase::url());
   intptr_t line_no = 4;
   Dart_Handle res = Dart_SetBreakpoint(script_url, line_no);
   EXPECT_VALID(res);
 
   breakpoint_hit = false;
   Dart_Handle point = Invoke("main");
   EXPECT_VALID(point);
   EXPECT(breakpoint_hit == true);
 
   Dart_Handle r =
       Dart_EvaluateExpr(point, NewString("_factor * sqrt(x*x + y*y)"));
   EXPECT_VALID(r);
   EXPECT(Dart_IsDouble(r));
   EXPECT_EQ(50.0, ToDouble(r));
 
   Dart_Handle len = Dart_EvaluateExpr(point, NewString("l.length"));
   EXPECT_VALID(len);
   EXPECT(Dart_IsNumber(len));
   EXPECT_EQ(3, ToInt64(len));
+
+  Dart_Handle point_class = Dart_GetClass(script_lib, NewString("Point"));
+  EXPECT_VALID(point_class);
+  Dart_Handle elem = Dart_EvaluateExpr(point_class, NewString("m['\"']"));
+  EXPECT_VALID(elem);
+  EXPECT(Dart_IsString(elem));
+  EXPECT_STREQ("quote", ToCString(elem));
+
+  elem = Dart_EvaluateExpr(point_class, NewString("m[\"\\t\"]"));
+  EXPECT_VALID(elem);
+  EXPECT(Dart_IsString(elem));
+  EXPECT_STREQ("tab", ToCString(elem));
 }
 
 
 TEST_CASE(Debug_GetSupertype) {
   const char* kScriptChars =
       "class Test {\n"
       "}\n"
       "class Test1 extends Test {\n"
       "}\n"
       "class Test2<T> {\n"
@@ skipping 129 matching lines @@
 
   Dart_Handle list_type = Dart_InstanceGetType(list_access_test_obj);
   Dart_Handle super_type = Dart_GetSupertype(list_type);
   EXPECT(!Dart_IsError(super_type));
   super_type = Dart_GetSupertype(super_type);
   EXPECT(!Dart_IsError(super_type));
   EXPECT(super_type == Dart_Null());
 }
 
 }  // namespace dart