base/json/json_value_serializer_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <string>
   6
   7 #include "base/files/file_util.h"
   8 #include "base/files/scoped_temp_dir.h"
   9 #include "base/json/json_file_value_serializer.h"
  10 #include "base/json/json_reader.h"
  11 #include "base/json/json_string_value_serializer.h"
  12 #include "base/json/json_writer.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/path_service.h"
  15 #include "base/strings/string_piece.h"
  16 #include "base/strings/string_util.h"
  17 #include "base/strings/utf_string_conversions.h"
  18 #include "base/values.h"
  19 #include "testing/gtest/include/gtest/gtest.h"
  20
  21 namespace base {
  22
  23 namespace {
  24
  25 // Some proper JSON to test with:
  26 const char kProperJSON[] =
  27     "{\n"
  28     "   \"compound\": {\n"
  29     "      \"a\": 1,\n"
  30     "      \"b\": 2\n"
  31     "   },\n"
  32     "   \"some_String\": \"1337\",\n"
  33     "   \"some_int\": 42,\n"
  34     "   \"the_list\": [ \"val1\", \"val2\" ]\n"
  35     "}\n";
  36
  37 // Some proper JSON with trailing commas:
  38 const char kProperJSONWithCommas[] =
  39     "{\n"
  40     "\t\"some_int\": 42,\n"
  41     "\t\"some_String\": \"1337\",\n"
  42     "\t\"the_list\": [\"val1\", \"val2\", ],\n"
  43     "\t\"compound\": { \"a\": 1, \"b\": 2, },\n"
  44     "}\n";
  45
  46 // kProperJSON with a few misc characters at the begin and end.
  47 const char kProperJSONPadded[] =
  48     ")]}'\n"
  49     "{\n"
  50     "   \"compound\": {\n"
  51     "      \"a\": 1,\n"
  52     "      \"b\": 2\n"
  53     "   },\n"
  54     "   \"some_String\": \"1337\",\n"
  55     "   \"some_int\": 42,\n"
  56     "   \"the_list\": [ \"val1\", \"val2\" ]\n"
  57     "}\n"
  58     "?!ab\n";
  59
  60 const char kWinLineEnds[] = "\r\n";
  61 const char kLinuxLineEnds[] = "\n";
  62
  63 // Verifies the generated JSON against the expected output.
  64 void CheckJSONIsStillTheSame(const Value& value) {
  65   // Serialize back the output.
  66   std::string serialized_json;
  67   JSONStringValueSerializer str_serializer(&serialized_json);
  68   str_serializer.set_pretty_print(true);
  69   ASSERT_TRUE(str_serializer.Serialize(value));
  70   // Unify line endings between platforms.
  71   ReplaceSubstringsAfterOffset(&serialized_json, 0,
  72                                kWinLineEnds, kLinuxLineEnds);
  73   // Now compare the input with the output.
  74   ASSERT_EQ(kProperJSON, serialized_json);
  75 }
  76
  77 void ValidateJsonList(const std::string& json) {
  78   scoped_ptr<Value> root = JSONReader::Read(json);
  79   ASSERT_TRUE(root.get() && root->IsType(Value::TYPE_LIST));
  80   ListValue* list = static_cast<ListValue*>(root.get());
  81   ASSERT_EQ(1U, list->GetSize());
  82   Value* elt = NULL;
  83   ASSERT_TRUE(list->Get(0, &elt));
  84   int value = 0;
  85   ASSERT_TRUE(elt && elt->GetAsInteger(&value));
  86   ASSERT_EQ(1, value);
  87 }
  88
  89 // Test proper JSON deserialization from string is working.
  90 TEST(JSONValueDeserializerTest, ReadProperJSONFromString) {
  91   // Try to deserialize it through the serializer.
  92   JSONStringValueDeserializer str_deserializer(kProperJSON);
  93
  94   int error_code = 0;
  95   std::string error_message;
  96   scoped_ptr<Value> value(
  97       str_deserializer.Deserialize(&error_code, &error_message));
  98   ASSERT_TRUE(value.get());
  99   ASSERT_EQ(0, error_code);
 100   ASSERT_TRUE(error_message.empty());
 101   // Verify if the same JSON is still there.
 102   CheckJSONIsStillTheSame(*value);
 103 }
 104
 105 // Test proper JSON deserialization from a StringPiece substring.
 106 TEST(JSONValueDeserializerTest, ReadProperJSONFromStringPiece) {
 107   // Create a StringPiece for the substring of kProperJSONPadded that matches
 108   // kProperJSON.
 109   base::StringPiece proper_json(kProperJSONPadded);
 110   proper_json = proper_json.substr(5, proper_json.length() - 10);
 111   JSONStringValueDeserializer str_deserializer(proper_json);
 112
 113   int error_code = 0;
 114   std::string error_message;
 115   scoped_ptr<Value> value(
 116       str_deserializer.Deserialize(&error_code, &error_message));
 117   ASSERT_TRUE(value.get());
 118   ASSERT_EQ(0, error_code);
 119   ASSERT_TRUE(error_message.empty());
 120   // Verify if the same JSON is still there.
 121   CheckJSONIsStillTheSame(*value);
 122 }
 123
 124 // Test that trialing commas are only properly deserialized from string when
 125 // the proper flag for that is set.
 126 TEST(JSONValueDeserializerTest, ReadJSONWithTrailingCommasFromString) {
 127   // Try to deserialize it through the serializer.
 128   JSONStringValueDeserializer str_deserializer(kProperJSONWithCommas);
 129
 130   int error_code = 0;
 131   std::string error_message;
 132   scoped_ptr<Value> value(
 133       str_deserializer.Deserialize(&error_code, &error_message));
 134   ASSERT_FALSE(value.get());
 135   ASSERT_NE(0, error_code);
 136   ASSERT_FALSE(error_message.empty());
 137   // Now the flag is set and it must pass.
 138   str_deserializer.set_allow_trailing_comma(true);
 139   value.reset(str_deserializer.Deserialize(&error_code, &error_message));
 140   ASSERT_TRUE(value.get());
 141   ASSERT_EQ(JSONReader::JSON_TRAILING_COMMA, error_code);
 142   // Verify if the same JSON is still there.
 143   CheckJSONIsStillTheSame(*value);
 144 }
 145
 146 // Test proper JSON deserialization from file is working.
 147 TEST(JSONValueDeserializerTest, ReadProperJSONFromFile) {
 148   ScopedTempDir tempdir;
 149   ASSERT_TRUE(tempdir.CreateUniqueTempDir());
 150   // Write it down in the file.
 151   FilePath temp_file(tempdir.path().AppendASCII("test.json"));
 152   ASSERT_EQ(static_cast<int>(strlen(kProperJSON)),
 153             WriteFile(temp_file, kProperJSON, strlen(kProperJSON)));
 154
 155   // Try to deserialize it through the serializer.
 156   JSONFileValueDeserializer file_deserializer(temp_file);
 157
 158   int error_code = 0;
 159   std::string error_message;
 160   scoped_ptr<Value> value(
 161       file_deserializer.Deserialize(&error_code, &error_message));
 162   ASSERT_TRUE(value.get());
 163   ASSERT_EQ(0, error_code);
 164   ASSERT_TRUE(error_message.empty());
 165   // Verify if the same JSON is still there.
 166   CheckJSONIsStillTheSame(*value);
 167 }
 168
 169 // Test that trialing commas are only properly deserialized from file when
 170 // the proper flag for that is set.
 171 TEST(JSONValueDeserializerTest, ReadJSONWithCommasFromFile) {
 172   ScopedTempDir tempdir;
 173   ASSERT_TRUE(tempdir.CreateUniqueTempDir());
 174   // Write it down in the file.
 175   FilePath temp_file(tempdir.path().AppendASCII("test.json"));
 176   ASSERT_EQ(static_cast<int>(strlen(kProperJSONWithCommas)),
 177             WriteFile(temp_file, kProperJSONWithCommas,
 178                       strlen(kProperJSONWithCommas)));
 179
 180   // Try to deserialize it through the serializer.
 181   JSONFileValueDeserializer file_deserializer(temp_file);
 182   // This must fail without the proper flag.
 183   int error_code = 0;
 184   std::string error_message;
 185   scoped_ptr<Value> value(
 186       file_deserializer.Deserialize(&error_code, &error_message));
 187   ASSERT_FALSE(value.get());
 188   ASSERT_NE(0, error_code);
 189   ASSERT_FALSE(error_message.empty());
 190   // Now the flag is set and it must pass.
 191   file_deserializer.set_allow_trailing_comma(true);
 192   value.reset(file_deserializer.Deserialize(&error_code, &error_message));
 193   ASSERT_TRUE(value.get());
 194   ASSERT_EQ(JSONReader::JSON_TRAILING_COMMA, error_code);
 195   // Verify if the same JSON is still there.
 196   CheckJSONIsStillTheSame(*value);
 197 }
 198
 199 TEST(JSONValueDeserializerTest, AllowTrailingComma) {
 200   scoped_ptr<Value> root;
 201   scoped_ptr<Value> root_expected;
 202   static const char kTestWithCommas[] = "{\"key\": [true,],}";
 203   static const char kTestNoCommas[] = "{\"key\": [true]}";
 204
 205   JSONStringValueDeserializer deserializer(kTestWithCommas);
 206   deserializer.set_allow_trailing_comma(true);
 207   JSONStringValueDeserializer deserializer_expected(kTestNoCommas);
 208   root.reset(deserializer.Deserialize(NULL, NULL));
 209   ASSERT_TRUE(root.get());
 210   root_expected.reset(deserializer_expected.Deserialize(NULL, NULL));
 211   ASSERT_TRUE(root_expected.get());
 212   ASSERT_TRUE(root->Equals(root_expected.get()));
 213 }
 214
 215 TEST(JSONValueSerializerTest, Roundtrip) {
 216   static const char kOriginalSerialization[] =
 217     "{\"bool\":true,\"double\":3.14,\"int\":42,\"list\":[1,2],\"null\":null}";
 218   JSONStringValueDeserializer deserializer(kOriginalSerialization);
 219   scoped_ptr<Value> root(deserializer.Deserialize(NULL, NULL));
 220   ASSERT_TRUE(root.get());
 221   ASSERT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 222
 223   DictionaryValue* root_dict = static_cast<DictionaryValue*>(root.get());
 224
 225   Value* null_value = NULL;
 226   ASSERT_TRUE(root_dict->Get("null", &null_value));
 227   ASSERT_TRUE(null_value);
 228   ASSERT_TRUE(null_value->IsType(Value::TYPE_NULL));
 229
 230   bool bool_value = false;
 231   ASSERT_TRUE(root_dict->GetBoolean("bool", &bool_value));
 232   ASSERT_TRUE(bool_value);
 233
 234   int int_value = 0;
 235   ASSERT_TRUE(root_dict->GetInteger("int", &int_value));
 236   ASSERT_EQ(42, int_value);
 237
 238   double double_value = 0.0;
 239   ASSERT_TRUE(root_dict->GetDouble("double", &double_value));
 240   ASSERT_DOUBLE_EQ(3.14, double_value);
 241
 242   std::string test_serialization;
 243   JSONStringValueSerializer mutable_serializer(&test_serialization);
 244   ASSERT_TRUE(mutable_serializer.Serialize(*root_dict));
 245   ASSERT_EQ(kOriginalSerialization, test_serialization);
 246
 247   mutable_serializer.set_pretty_print(true);
 248   ASSERT_TRUE(mutable_serializer.Serialize(*root_dict));
 249   // JSON output uses a different newline style on Windows than on other
 250   // platforms.
 251 #if defined(OS_WIN)
 252 #define JSON_NEWLINE "\r\n"
 253 #else
 254 #define JSON_NEWLINE "\n"
 255 #endif
 256   const std::string pretty_serialization =
 257     "{" JSON_NEWLINE
 258     "   \"bool\": true," JSON_NEWLINE
 259     "   \"double\": 3.14," JSON_NEWLINE
 260     "   \"int\": 42," JSON_NEWLINE
 261     "   \"list\": [ 1, 2 ]," JSON_NEWLINE
 262     "   \"null\": null" JSON_NEWLINE
 263     "}" JSON_NEWLINE;
 264 #undef JSON_NEWLINE
 265   ASSERT_EQ(pretty_serialization, test_serialization);
 266 }
 267
 268 TEST(JSONValueSerializerTest, StringEscape) {
 269   string16 all_chars;
 270   for (int i = 1; i < 256; ++i) {
 271     all_chars += static_cast<char16>(i);
 272   }
 273   // Generated in in Firefox using the following js (with an extra backslash for
 274   // double quote):
 275   // var s = '';
 276   // for (var i = 1; i < 256; ++i) { s += String.fromCharCode(i); }
 277   // uneval(s).replace(/\\/g, "\\\\");
 278   std::string all_chars_expected =
 279       "\\u0001\\u0002\\u0003\\u0004\\u0005\\u0006\\u0007\\b\\t\\n\\u000B\\f\\r"
 280       "\\u000E\\u000F\\u0010\\u0011\\u0012\\u0013\\u0014\\u0015\\u0016\\u0017"
 281       "\\u0018\\u0019\\u001A\\u001B\\u001C\\u001D\\u001E\\u001F !\\\"#$%&'()*+,"
 282       "-./0123456789:;\\u003C=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\\\]^_`abcde"
 283       "fghijklmnopqrstuvwxyz{|}~\x7F\xC2\x80\xC2\x81\xC2\x82\xC2\x83\xC2\x84"
 284       "\xC2\x85\xC2\x86\xC2\x87\xC2\x88\xC2\x89\xC2\x8A\xC2\x8B\xC2\x8C\xC2\x8D"
 285       "\xC2\x8E\xC2\x8F\xC2\x90\xC2\x91\xC2\x92\xC2\x93\xC2\x94\xC2\x95\xC2\x96"
 286       "\xC2\x97\xC2\x98\xC2\x99\xC2\x9A\xC2\x9B\xC2\x9C\xC2\x9D\xC2\x9E\xC2\x9F"
 287       "\xC2\xA0\xC2\xA1\xC2\xA2\xC2\xA3\xC2\xA4\xC2\xA5\xC2\xA6\xC2\xA7\xC2\xA8"
 288       "\xC2\xA9\xC2\xAA\xC2\xAB\xC2\xAC\xC2\xAD\xC2\xAE\xC2\xAF\xC2\xB0\xC2\xB1"
 289       "\xC2\xB2\xC2\xB3\xC2\xB4\xC2\xB5\xC2\xB6\xC2\xB7\xC2\xB8\xC2\xB9\xC2\xBA"
 290       "\xC2\xBB\xC2\xBC\xC2\xBD\xC2\xBE\xC2\xBF\xC3\x80\xC3\x81\xC3\x82\xC3\x83"
 291       "\xC3\x84\xC3\x85\xC3\x86\xC3\x87\xC3\x88\xC3\x89\xC3\x8A\xC3\x8B\xC3\x8C"
 292       "\xC3\x8D\xC3\x8E\xC3\x8F\xC3\x90\xC3\x91\xC3\x92\xC3\x93\xC3\x94\xC3\x95"
 293       "\xC3\x96\xC3\x97\xC3\x98\xC3\x99\xC3\x9A\xC3\x9B\xC3\x9C\xC3\x9D\xC3\x9E"
 294       "\xC3\x9F\xC3\xA0\xC3\xA1\xC3\xA2\xC3\xA3\xC3\xA4\xC3\xA5\xC3\xA6\xC3\xA7"
 295       "\xC3\xA8\xC3\xA9\xC3\xAA\xC3\xAB\xC3\xAC\xC3\xAD\xC3\xAE\xC3\xAF\xC3\xB0"
 296       "\xC3\xB1\xC3\xB2\xC3\xB3\xC3\xB4\xC3\xB5\xC3\xB6\xC3\xB7\xC3\xB8\xC3\xB9"
 297       "\xC3\xBA\xC3\xBB\xC3\xBC\xC3\xBD\xC3\xBE\xC3\xBF";
 298
 299   std::string expected_output = "{\"all_chars\":\"" + all_chars_expected +
 300                                  "\"}";
 301   // Test JSONWriter interface
 302   std::string output_js;
 303   DictionaryValue valueRoot;
 304   valueRoot.SetString("all_chars", all_chars);
 305   JSONWriter::Write(valueRoot, &output_js);
 306   ASSERT_EQ(expected_output, output_js);
 307
 308   // Test JSONValueSerializer interface (uses JSONWriter).
 309   JSONStringValueSerializer serializer(&output_js);
 310   ASSERT_TRUE(serializer.Serialize(valueRoot));
 311   ASSERT_EQ(expected_output, output_js);
 312 }
 313
 314 TEST(JSONValueSerializerTest, UnicodeStrings) {
 315   // unicode string json -> escaped ascii text
 316   DictionaryValue root;
 317   string16 test(WideToUTF16(L"\x7F51\x9875"));
 318   root.SetString("web", test);
 319
 320   static const char kExpected[] = "{\"web\":\"\xE7\xBD\x91\xE9\xA1\xB5\"}";
 321
 322   std::string actual;
 323   JSONStringValueSerializer serializer(&actual);
 324   ASSERT_TRUE(serializer.Serialize(root));
 325   ASSERT_EQ(kExpected, actual);
 326
 327   // escaped ascii text -> json
 328   JSONStringValueDeserializer deserializer(kExpected);
 329   scoped_ptr<Value> deserial_root(deserializer.Deserialize(NULL, NULL));
 330   ASSERT_TRUE(deserial_root.get());
 331   DictionaryValue* dict_root =
 332       static_cast<DictionaryValue*>(deserial_root.get());
 333   string16 web_value;
 334   ASSERT_TRUE(dict_root->GetString("web", &web_value));
 335   ASSERT_EQ(test, web_value);
 336 }
 337
 338 TEST(JSONValueSerializerTest, HexStrings) {
 339   // hex string json -> escaped ascii text
 340   DictionaryValue root;
 341   string16 test(WideToUTF16(L"\x01\x02"));
 342   root.SetString("test", test);
 343
 344   static const char kExpected[] = "{\"test\":\"\\u0001\\u0002\"}";
 345
 346   std::string actual;
 347   JSONStringValueSerializer serializer(&actual);
 348   ASSERT_TRUE(serializer.Serialize(root));
 349   ASSERT_EQ(kExpected, actual);
 350
 351   // escaped ascii text -> json
 352   JSONStringValueDeserializer deserializer(kExpected);
 353   scoped_ptr<Value> deserial_root(deserializer.Deserialize(NULL, NULL));
 354   ASSERT_TRUE(deserial_root.get());
 355   DictionaryValue* dict_root =
 356       static_cast<DictionaryValue*>(deserial_root.get());
 357   string16 test_value;
 358   ASSERT_TRUE(dict_root->GetString("test", &test_value));
 359   ASSERT_EQ(test, test_value);
 360
 361   // Test converting escaped regular chars
 362   static const char kEscapedChars[] = "{\"test\":\"\\u0067\\u006f\"}";
 363   JSONStringValueDeserializer deserializer2(kEscapedChars);
 364   deserial_root.reset(deserializer2.Deserialize(NULL, NULL));
 365   ASSERT_TRUE(deserial_root.get());
 366   dict_root = static_cast<DictionaryValue*>(deserial_root.get());
 367   ASSERT_TRUE(dict_root->GetString("test", &test_value));
 368   ASSERT_EQ(ASCIIToUTF16("go"), test_value);
 369 }
 370
 371 TEST(JSONValueSerializerTest, JSONReaderComments) {
 372   ValidateJsonList("[ // 2, 3, ignore me ] \n1 ]");
 373   ValidateJsonList("[ /* 2, \n3, ignore me ]*/ \n1 ]");
 374   ValidateJsonList("//header\n[ // 2, \n// 3, \n1 ]// footer");
 375   ValidateJsonList("/*\n[ // 2, \n// 3, \n1 ]*/[1]");
 376   ValidateJsonList("[ 1 /* one */ ] /* end */");
 377   ValidateJsonList("[ 1 //// ,2\r\n ]");
 378
 379   scoped_ptr<Value> root;
 380
 381   // It's ok to have a comment in a string.
 382   root.reset(JSONReader::DeprecatedRead("[\"// ok\\n /* foo */ \"]"));
 383   ASSERT_TRUE(root.get() && root->IsType(Value::TYPE_LIST));
 384   ListValue* list = static_cast<ListValue*>(root.get());
 385   ASSERT_EQ(1U, list->GetSize());
 386   Value* elt = NULL;
 387   ASSERT_TRUE(list->Get(0, &elt));
 388   std::string value;
 389   ASSERT_TRUE(elt && elt->GetAsString(&value));
 390   ASSERT_EQ("// ok\n /* foo */ ", value);
 391
 392   // You can't nest comments.
 393   root.reset(JSONReader::DeprecatedRead("/* /* inner */ outer */ [ 1 ]"));
 394   ASSERT_FALSE(root.get());
 395
 396   // Not a open comment token.
 397   root.reset(JSONReader::DeprecatedRead("/ * * / [1]"));
 398   ASSERT_FALSE(root.get());
 399 }
 400
 401 class JSONFileValueSerializerTest : public testing::Test {
 402  protected:
 403   void SetUp() override { ASSERT_TRUE(temp_dir_.CreateUniqueTempDir()); }
 404
 405   base::ScopedTempDir temp_dir_;
 406 };
 407
 408 TEST_F(JSONFileValueSerializerTest, Roundtrip) {
 409   base::FilePath original_file_path;
 410   ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &original_file_path));
 411   original_file_path =
 412       original_file_path.Append(FILE_PATH_LITERAL("serializer_test.json"));
 413
 414   ASSERT_TRUE(PathExists(original_file_path));
 415
 416   JSONFileValueDeserializer deserializer(original_file_path);
 417   scoped_ptr<Value> root;
 418   root.reset(deserializer.Deserialize(NULL, NULL));
 419
 420   ASSERT_TRUE(root.get());
 421   ASSERT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 422
 423   DictionaryValue* root_dict = static_cast<DictionaryValue*>(root.get());
 424
 425   Value* null_value = NULL;
 426   ASSERT_TRUE(root_dict->Get("null", &null_value));
 427   ASSERT_TRUE(null_value);
 428   ASSERT_TRUE(null_value->IsType(Value::TYPE_NULL));
 429
 430   bool bool_value = false;
 431   ASSERT_TRUE(root_dict->GetBoolean("bool", &bool_value));
 432   ASSERT_TRUE(bool_value);
 433
 434   int int_value = 0;
 435   ASSERT_TRUE(root_dict->GetInteger("int", &int_value));
 436   ASSERT_EQ(42, int_value);
 437
 438   std::string string_value;
 439   ASSERT_TRUE(root_dict->GetString("string", &string_value));
 440   ASSERT_EQ("hello", string_value);
 441
 442   // Now try writing.
 443   const base::FilePath written_file_path =
 444       temp_dir_.path().Append(FILE_PATH_LITERAL("test_output.js"));
 445
 446   ASSERT_FALSE(PathExists(written_file_path));
 447   JSONFileValueSerializer serializer(written_file_path);
 448   ASSERT_TRUE(serializer.Serialize(*root));
 449   ASSERT_TRUE(PathExists(written_file_path));
 450
 451   // Now compare file contents.
 452   EXPECT_TRUE(TextContentsEqual(original_file_path, written_file_path));
 453   EXPECT_TRUE(base::DeleteFile(written_file_path, false));
 454 }
 455
 456 TEST_F(JSONFileValueSerializerTest, RoundtripNested) {
 457   base::FilePath original_file_path;
 458   ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &original_file_path));
 459   original_file_path = original_file_path.Append(
 460       FILE_PATH_LITERAL("serializer_nested_test.json"));
 461
 462   ASSERT_TRUE(PathExists(original_file_path));
 463
 464   JSONFileValueDeserializer deserializer(original_file_path);
 465   scoped_ptr<Value> root;
 466   root.reset(deserializer.Deserialize(NULL, NULL));
 467   ASSERT_TRUE(root.get());
 468
 469   // Now try writing.
 470   base::FilePath written_file_path = temp_dir_.path().Append(
 471       FILE_PATH_LITERAL("test_output.json"));
 472
 473   ASSERT_FALSE(PathExists(written_file_path));
 474   JSONFileValueSerializer serializer(written_file_path);
 475   ASSERT_TRUE(serializer.Serialize(*root));
 476   ASSERT_TRUE(PathExists(written_file_path));
 477
 478   // Now compare file contents.
 479   EXPECT_TRUE(TextContentsEqual(original_file_path, written_file_path));
 480   EXPECT_TRUE(base::DeleteFile(written_file_path, false));
 481 }
 482
 483 TEST_F(JSONFileValueSerializerTest, NoWhitespace) {
 484   base::FilePath source_file_path;
 485   ASSERT_TRUE(PathService::Get(DIR_TEST_DATA, &source_file_path));
 486   source_file_path = source_file_path.Append(
 487       FILE_PATH_LITERAL("serializer_test_nowhitespace.json"));
 488   ASSERT_TRUE(PathExists(source_file_path));
 489   JSONFileValueDeserializer deserializer(source_file_path);
 490   scoped_ptr<Value> root;
 491   root.reset(deserializer.Deserialize(NULL, NULL));
 492   ASSERT_TRUE(root.get());
 493 }
 494
 495 }  // namespace
 496
 497 }  // namespace base