JSON string decoding for VM debugger

runtime/vm/json_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 "platform/assert.h"
 #include "platform/json.h"
 #include "vm/json_stream.h"
 #include "vm/unit_test.h"
 
 namespace dart {
@@ skipping 55 matching lines @@
 
 
 TEST_CASE(JSON_JSONReader) {
   const char* jobj = "{ \"id\": 5, "
                      "  \"command\" : \"Debugger.setBreakpoint\","
                      "  \"params\" : { "
                      "    \"url\" : \"blah.dart\", "
                      "    \"foo\" : [null, 1, { }, \"bar\", true, false],"
                      "    \"line\": 111, "
                      "  },"
-                     "  \"foo\": \"outer foo\", "
+                     "  \"foo\": \"outer foo\",     "
+                     "  \"quote\": \"\\\"\",        "
+                     "  \"white\": \"\\t \\n\",     "
                      "}";
 
   JSONReader reader(jobj);
   bool found;
+  char s[128];
 
   found = reader.Seek("id");
   EXPECT(found);
   EXPECT_EQ(reader.Type(), JSONReader::kInteger);
   found = reader.Seek("foo");
   EXPECT(found);
   EXPECT_EQ(reader.Type(), JSONReader::kString);
   EXPECT(reader.IsStringLiteral("outer foo"));
+
+  found = reader.Seek("quote");
+  EXPECT(found);
+  EXPECT_EQ(reader.Type(), JSONReader::kString);
+  reader.GetRawValueChars(s, sizeof s);
+  EXPECT_STREQ("\\\"", s);
+  reader.GetDecodedValueChars(s, sizeof s);
+  EXPECT_STREQ("\"", s);
+
+  found = reader.Seek("white");
+  EXPECT(found);
+  EXPECT_EQ(reader.Type(), JSONReader::kString);
+  reader.GetRawValueChars(s, sizeof s);
+  EXPECT_STREQ("\\t \\n", s);
+  reader.GetDecodedValueChars(s, sizeof s);
+  EXPECT_STREQ("\t \n", s);
+
   found = reader.Seek("line");
   EXPECT(!found);
   found = reader.Seek("params");
   EXPECT(found);
   EXPECT_EQ(reader.Type(), JSONReader::kObject);
   reader.Set(reader.ValueChars());
   found = reader.Seek("foo");
   EXPECT(found);
   EXPECT_EQ(reader.Type(), JSONReader::kArray);
   found = reader.Seek("non-existing");
@@ skipping 154 matching lines @@
 
 TEST_CASE(JSON_JSONStream_EscapedString) {
   TextBuffer tb(256);
   JSONStream js(&tb);
   js.PrintValue("Hel\"\"lo\r\n\t");
   EXPECT_STREQ("\"Hel\\\"\\\"lo\\r\\n\\t\"", tb.buf());
 }
 
 
 }  // namespace dart