base/json/json_reader_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 "base/json/json_reader.h"
   6
   7 #include "base/base_paths.h"
   8 #include "base/files/file_util.h"
   9 #include "base/logging.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/path_service.h"
  12 #include "base/strings/string_piece.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "base/values.h"
  15 #include "build/build_config.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17
  18 namespace base {
  19
  20 TEST(JSONReaderTest, Reading) {
  21   // some whitespace checking
  22   scoped_ptr<Value> root;
  23   root.reset(JSONReader().ReadToValue("   null   "));
  24   ASSERT_TRUE(root.get());
  25   EXPECT_TRUE(root->IsType(Value::TYPE_NULL));
  26
  27   // Invalid JSON string
  28   root.reset(JSONReader().ReadToValue("nu"));
  29   EXPECT_FALSE(root.get());
  30
  31   // Simple bool
  32   root.reset(JSONReader().ReadToValue("true  "));
  33   ASSERT_TRUE(root.get());
  34   EXPECT_TRUE(root->IsType(Value::TYPE_BOOLEAN));
  35
  36   // Embedded comment
  37   root.reset(JSONReader().ReadToValue("/* comment */null"));
  38   ASSERT_TRUE(root.get());
  39   EXPECT_TRUE(root->IsType(Value::TYPE_NULL));
  40   root.reset(JSONReader().ReadToValue("40 /* comment */"));
  41   ASSERT_TRUE(root.get());
  42   EXPECT_TRUE(root->IsType(Value::TYPE_INTEGER));
  43   root.reset(JSONReader().ReadToValue("true // comment"));
  44   ASSERT_TRUE(root.get());
  45   EXPECT_TRUE(root->IsType(Value::TYPE_BOOLEAN));
  46   root.reset(JSONReader().ReadToValue("/* comment */\"sample string\""));
  47   ASSERT_TRUE(root.get());
  48   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
  49   std::string value;
  50   EXPECT_TRUE(root->GetAsString(&value));
  51   EXPECT_EQ("sample string", value);
  52   root.reset(JSONReader().ReadToValue("[1, /* comment, 2 ] */ \n 3]"));
  53   ASSERT_TRUE(root.get());
  54   ListValue* list = static_cast<ListValue*>(root.get());
  55   EXPECT_EQ(2u, list->GetSize());
  56   int int_val = 0;
  57   EXPECT_TRUE(list->GetInteger(0, &int_val));
  58   EXPECT_EQ(1, int_val);
  59   EXPECT_TRUE(list->GetInteger(1, &int_val));
  60   EXPECT_EQ(3, int_val);
  61   root.reset(JSONReader().ReadToValue("[1, /*a*/2, 3]"));
  62   ASSERT_TRUE(root.get());
  63   list = static_cast<ListValue*>(root.get());
  64   EXPECT_EQ(3u, list->GetSize());
  65   root.reset(JSONReader().ReadToValue("/* comment **/42"));
  66   ASSERT_TRUE(root.get());
  67   EXPECT_TRUE(root->IsType(Value::TYPE_INTEGER));
  68   EXPECT_TRUE(root->GetAsInteger(&int_val));
  69   EXPECT_EQ(42, int_val);
  70   root.reset(JSONReader().ReadToValue(
  71       "/* comment **/\n"
  72       "// */ 43\n"
  73       "44"));
  74   ASSERT_TRUE(root.get());
  75   EXPECT_TRUE(root->IsType(Value::TYPE_INTEGER));
  76   EXPECT_TRUE(root->GetAsInteger(&int_val));
  77   EXPECT_EQ(44, int_val);
  78
  79   // Test number formats
  80   root.reset(JSONReader().ReadToValue("43"));
  81   ASSERT_TRUE(root.get());
  82   EXPECT_TRUE(root->IsType(Value::TYPE_INTEGER));
  83   EXPECT_TRUE(root->GetAsInteger(&int_val));
  84   EXPECT_EQ(43, int_val);
  85
  86   // According to RFC4627, oct, hex, and leading zeros are invalid JSON.
  87   root.reset(JSONReader().ReadToValue("043"));
  88   EXPECT_FALSE(root.get());
  89   root.reset(JSONReader().ReadToValue("0x43"));
  90   EXPECT_FALSE(root.get());
  91   root.reset(JSONReader().ReadToValue("00"));
  92   EXPECT_FALSE(root.get());
  93
  94   // Test 0 (which needs to be special cased because of the leading zero
  95   // clause).
  96   root.reset(JSONReader().ReadToValue("0"));
  97   ASSERT_TRUE(root.get());
  98   EXPECT_TRUE(root->IsType(Value::TYPE_INTEGER));
  99   int_val = 1;
 100   EXPECT_TRUE(root->GetAsInteger(&int_val));
 101   EXPECT_EQ(0, int_val);
 102
 103   // Numbers that overflow ints should succeed, being internally promoted to
 104   // storage as doubles
 105   root.reset(JSONReader().ReadToValue("2147483648"));
 106   ASSERT_TRUE(root.get());
 107   double double_val;
 108   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 109   double_val = 0.0;
 110   EXPECT_TRUE(root->GetAsDouble(&double_val));
 111   EXPECT_DOUBLE_EQ(2147483648.0, double_val);
 112   root.reset(JSONReader().ReadToValue("-2147483649"));
 113   ASSERT_TRUE(root.get());
 114   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 115   double_val = 0.0;
 116   EXPECT_TRUE(root->GetAsDouble(&double_val));
 117   EXPECT_DOUBLE_EQ(-2147483649.0, double_val);
 118
 119   // Parse a double
 120   root.reset(JSONReader().ReadToValue("43.1"));
 121   ASSERT_TRUE(root.get());
 122   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 123   double_val = 0.0;
 124   EXPECT_TRUE(root->GetAsDouble(&double_val));
 125   EXPECT_DOUBLE_EQ(43.1, double_val);
 126
 127   root.reset(JSONReader().ReadToValue("4.3e-1"));
 128   ASSERT_TRUE(root.get());
 129   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 130   double_val = 0.0;
 131   EXPECT_TRUE(root->GetAsDouble(&double_val));
 132   EXPECT_DOUBLE_EQ(.43, double_val);
 133
 134   root.reset(JSONReader().ReadToValue("2.1e0"));
 135   ASSERT_TRUE(root.get());
 136   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 137   double_val = 0.0;
 138   EXPECT_TRUE(root->GetAsDouble(&double_val));
 139   EXPECT_DOUBLE_EQ(2.1, double_val);
 140
 141   root.reset(JSONReader().ReadToValue("2.1e+0001"));
 142   ASSERT_TRUE(root.get());
 143   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 144   double_val = 0.0;
 145   EXPECT_TRUE(root->GetAsDouble(&double_val));
 146   EXPECT_DOUBLE_EQ(21.0, double_val);
 147
 148   root.reset(JSONReader().ReadToValue("0.01"));
 149   ASSERT_TRUE(root.get());
 150   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 151   double_val = 0.0;
 152   EXPECT_TRUE(root->GetAsDouble(&double_val));
 153   EXPECT_DOUBLE_EQ(0.01, double_val);
 154
 155   root.reset(JSONReader().ReadToValue("1.00"));
 156   ASSERT_TRUE(root.get());
 157   EXPECT_TRUE(root->IsType(Value::TYPE_DOUBLE));
 158   double_val = 0.0;
 159   EXPECT_TRUE(root->GetAsDouble(&double_val));
 160   EXPECT_DOUBLE_EQ(1.0, double_val);
 161
 162   // Fractional parts must have a digit before and after the decimal point.
 163   root.reset(JSONReader().ReadToValue("1."));
 164   EXPECT_FALSE(root.get());
 165   root.reset(JSONReader().ReadToValue(".1"));
 166   EXPECT_FALSE(root.get());
 167   root.reset(JSONReader().ReadToValue("1.e10"));
 168   EXPECT_FALSE(root.get());
 169
 170   // Exponent must have a digit following the 'e'.
 171   root.reset(JSONReader().ReadToValue("1e"));
 172   EXPECT_FALSE(root.get());
 173   root.reset(JSONReader().ReadToValue("1E"));
 174   EXPECT_FALSE(root.get());
 175   root.reset(JSONReader().ReadToValue("1e1."));
 176   EXPECT_FALSE(root.get());
 177   root.reset(JSONReader().ReadToValue("1e1.0"));
 178   EXPECT_FALSE(root.get());
 179
 180   // INF/-INF/NaN are not valid
 181   root.reset(JSONReader().ReadToValue("1e1000"));
 182   EXPECT_FALSE(root.get());
 183   root.reset(JSONReader().ReadToValue("-1e1000"));
 184   EXPECT_FALSE(root.get());
 185   root.reset(JSONReader().ReadToValue("NaN"));
 186   EXPECT_FALSE(root.get());
 187   root.reset(JSONReader().ReadToValue("nan"));
 188   EXPECT_FALSE(root.get());
 189   root.reset(JSONReader().ReadToValue("inf"));
 190   EXPECT_FALSE(root.get());
 191
 192   // Invalid number formats
 193   root.reset(JSONReader().ReadToValue("4.3.1"));
 194   EXPECT_FALSE(root.get());
 195   root.reset(JSONReader().ReadToValue("4e3.1"));
 196   EXPECT_FALSE(root.get());
 197
 198   // Test string parser
 199   root.reset(JSONReader().ReadToValue("\"hello world\""));
 200   ASSERT_TRUE(root.get());
 201   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
 202   std::string str_val;
 203   EXPECT_TRUE(root->GetAsString(&str_val));
 204   EXPECT_EQ("hello world", str_val);
 205
 206   // Empty string
 207   root.reset(JSONReader().ReadToValue("\"\""));
 208   ASSERT_TRUE(root.get());
 209   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
 210   str_val.clear();
 211   EXPECT_TRUE(root->GetAsString(&str_val));
 212   EXPECT_EQ("", str_val);
 213
 214   // Test basic string escapes
 215   root.reset(JSONReader().ReadToValue("\" \\\"\\\\\\/\\b\\f\\n\\r\\t\\v\""));
 216   ASSERT_TRUE(root.get());
 217   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
 218   str_val.clear();
 219   EXPECT_TRUE(root->GetAsString(&str_val));
 220   EXPECT_EQ(" \"\\/\b\f\n\r\t\v", str_val);
 221
 222   // Test hex and unicode escapes including the null character.
 223   root.reset(JSONReader().ReadToValue("\"\\x41\\x00\\u1234\""));
 224   ASSERT_TRUE(root.get());
 225   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
 226   str_val.clear();
 227   EXPECT_TRUE(root->GetAsString(&str_val));
 228   EXPECT_EQ(std::wstring(L"A\0\x1234", 3), UTF8ToWide(str_val));
 229
 230   // Test invalid strings
 231   root.reset(JSONReader().ReadToValue("\"no closing quote"));
 232   EXPECT_FALSE(root.get());
 233   root.reset(JSONReader().ReadToValue("\"\\z invalid escape char\""));
 234   EXPECT_FALSE(root.get());
 235   root.reset(JSONReader().ReadToValue("\"\\xAQ invalid hex code\""));
 236   EXPECT_FALSE(root.get());
 237   root.reset(JSONReader().ReadToValue("not enough hex chars\\x1\""));
 238   EXPECT_FALSE(root.get());
 239   root.reset(JSONReader().ReadToValue("\"not enough escape chars\\u123\""));
 240   EXPECT_FALSE(root.get());
 241   root.reset(JSONReader().ReadToValue("\"extra backslash at end of input\\\""));
 242   EXPECT_FALSE(root.get());
 243
 244   // Basic array
 245   root.reset(JSONReader::Read("[true, false, null]"));
 246   ASSERT_TRUE(root.get());
 247   EXPECT_TRUE(root->IsType(Value::TYPE_LIST));
 248   list = static_cast<ListValue*>(root.get());
 249   EXPECT_EQ(3U, list->GetSize());
 250
 251   // Test with trailing comma.  Should be parsed the same as above.
 252   scoped_ptr<Value> root2;
 253   root2.reset(JSONReader::Read("[true, false, null, ]",
 254                                JSON_ALLOW_TRAILING_COMMAS));
 255   EXPECT_TRUE(root->Equals(root2.get()));
 256
 257   // Empty array
 258   root.reset(JSONReader::Read("[]"));
 259   ASSERT_TRUE(root.get());
 260   EXPECT_TRUE(root->IsType(Value::TYPE_LIST));
 261   list = static_cast<ListValue*>(root.get());
 262   EXPECT_EQ(0U, list->GetSize());
 263
 264   // Nested arrays
 265   root.reset(JSONReader::Read("[[true], [], [false, [], [null]], null]"));
 266   ASSERT_TRUE(root.get());
 267   EXPECT_TRUE(root->IsType(Value::TYPE_LIST));
 268   list = static_cast<ListValue*>(root.get());
 269   EXPECT_EQ(4U, list->GetSize());
 270
 271   // Lots of trailing commas.
 272   root2.reset(JSONReader::Read("[[true], [], [false, [], [null, ]  , ], null,]",
 273                                JSON_ALLOW_TRAILING_COMMAS));
 274   EXPECT_TRUE(root->Equals(root2.get()));
 275
 276   // Invalid, missing close brace.
 277   root.reset(JSONReader::Read("[[true], [], [false, [], [null]], null"));
 278   EXPECT_FALSE(root.get());
 279
 280   // Invalid, too many commas
 281   root.reset(JSONReader::Read("[true,, null]"));
 282   EXPECT_FALSE(root.get());
 283   root.reset(JSONReader::Read("[true,, null]", JSON_ALLOW_TRAILING_COMMAS));
 284   EXPECT_FALSE(root.get());
 285
 286   // Invalid, no commas
 287   root.reset(JSONReader::Read("[true null]"));
 288   EXPECT_FALSE(root.get());
 289
 290   // Invalid, trailing comma
 291   root.reset(JSONReader::Read("[true,]"));
 292   EXPECT_FALSE(root.get());
 293
 294   // Valid if we set |allow_trailing_comma| to true.
 295   root.reset(JSONReader::Read("[true,]", JSON_ALLOW_TRAILING_COMMAS));
 296   ASSERT_TRUE(root.get());
 297   EXPECT_TRUE(root->IsType(Value::TYPE_LIST));
 298   list = static_cast<ListValue*>(root.get());
 299   EXPECT_EQ(1U, list->GetSize());
 300   Value* tmp_value = NULL;
 301   ASSERT_TRUE(list->Get(0, &tmp_value));
 302   EXPECT_TRUE(tmp_value->IsType(Value::TYPE_BOOLEAN));
 303   bool bool_value = false;
 304   EXPECT_TRUE(tmp_value->GetAsBoolean(&bool_value));
 305   EXPECT_TRUE(bool_value);
 306
 307   // Don't allow empty elements, even if |allow_trailing_comma| is
 308   // true.
 309   root.reset(JSONReader::Read("[,]", JSON_ALLOW_TRAILING_COMMAS));
 310   EXPECT_FALSE(root.get());
 311   root.reset(JSONReader::Read("[true,,]", JSON_ALLOW_TRAILING_COMMAS));
 312   EXPECT_FALSE(root.get());
 313   root.reset(JSONReader::Read("[,true,]", JSON_ALLOW_TRAILING_COMMAS));
 314   EXPECT_FALSE(root.get());
 315   root.reset(JSONReader::Read("[true,,false]", JSON_ALLOW_TRAILING_COMMAS));
 316   EXPECT_FALSE(root.get());
 317
 318   // Test objects
 319   root.reset(JSONReader::Read("{}"));
 320   ASSERT_TRUE(root.get());
 321   EXPECT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 322
 323   root.reset(JSONReader::Read(
 324       "{\"number\":9.87654321, \"null\":null , \"\\x53\" : \"str\" }"));
 325   ASSERT_TRUE(root.get());
 326   EXPECT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 327   DictionaryValue* dict_val = static_cast<DictionaryValue*>(root.get());
 328   double_val = 0.0;
 329   EXPECT_TRUE(dict_val->GetDouble("number", &double_val));
 330   EXPECT_DOUBLE_EQ(9.87654321, double_val);
 331   Value* null_val = NULL;
 332   ASSERT_TRUE(dict_val->Get("null", &null_val));
 333   EXPECT_TRUE(null_val->IsType(Value::TYPE_NULL));
 334   str_val.clear();
 335   EXPECT_TRUE(dict_val->GetString("S", &str_val));
 336   EXPECT_EQ("str", str_val);
 337
 338   root2.reset(JSONReader::Read(
 339       "{\"number\":9.87654321, \"null\":null , \"\\x53\" : \"str\", }",
 340       JSON_ALLOW_TRAILING_COMMAS));
 341   ASSERT_TRUE(root2.get());
 342   EXPECT_TRUE(root->Equals(root2.get()));
 343
 344   // Test newline equivalence.
 345   root2.reset(JSONReader::Read(
 346       "{\n"
 347       "  \"number\":9.87654321,\n"
 348       "  \"null\":null,\n"
 349       "  \"\\x53\":\"str\",\n"
 350       "}\n", JSON_ALLOW_TRAILING_COMMAS));
 351   ASSERT_TRUE(root2.get());
 352   EXPECT_TRUE(root->Equals(root2.get()));
 353
 354   root2.reset(JSONReader::Read(
 355       "{\r\n"
 356       "  \"number\":9.87654321,\r\n"
 357       "  \"null\":null,\r\n"
 358       "  \"\\x53\":\"str\",\r\n"
 359       "}\r\n", JSON_ALLOW_TRAILING_COMMAS));
 360   ASSERT_TRUE(root2.get());
 361   EXPECT_TRUE(root->Equals(root2.get()));
 362
 363   // Test nesting
 364   root.reset(JSONReader::Read(
 365       "{\"inner\":{\"array\":[true]},\"false\":false,\"d\":{}}"));
 366   ASSERT_TRUE(root.get());
 367   EXPECT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 368   dict_val = static_cast<DictionaryValue*>(root.get());
 369   DictionaryValue* inner_dict = NULL;
 370   ASSERT_TRUE(dict_val->GetDictionary("inner", &inner_dict));
 371   ListValue* inner_array = NULL;
 372   ASSERT_TRUE(inner_dict->GetList("array", &inner_array));
 373   EXPECT_EQ(1U, inner_array->GetSize());
 374   bool_value = true;
 375   EXPECT_TRUE(dict_val->GetBoolean("false", &bool_value));
 376   EXPECT_FALSE(bool_value);
 377   inner_dict = NULL;
 378   EXPECT_TRUE(dict_val->GetDictionary("d", &inner_dict));
 379
 380   root2.reset(JSONReader::Read(
 381       "{\"inner\": {\"array\":[true] , },\"false\":false,\"d\":{},}",
 382       JSON_ALLOW_TRAILING_COMMAS));
 383   EXPECT_TRUE(root->Equals(root2.get()));
 384
 385   // Test keys with periods
 386   root.reset(JSONReader::Read(
 387       "{\"a.b\":3,\"c\":2,\"d.e.f\":{\"g.h.i.j\":1}}"));
 388   ASSERT_TRUE(root.get());
 389   EXPECT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 390   dict_val = static_cast<DictionaryValue*>(root.get());
 391   int integer_value = 0;
 392   EXPECT_TRUE(dict_val->GetIntegerWithoutPathExpansion("a.b", &integer_value));
 393   EXPECT_EQ(3, integer_value);
 394   EXPECT_TRUE(dict_val->GetIntegerWithoutPathExpansion("c", &integer_value));
 395   EXPECT_EQ(2, integer_value);
 396   inner_dict = NULL;
 397   ASSERT_TRUE(dict_val->GetDictionaryWithoutPathExpansion("d.e.f",
 398                                                           &inner_dict));
 399   EXPECT_EQ(1U, inner_dict->size());
 400   EXPECT_TRUE(inner_dict->GetIntegerWithoutPathExpansion("g.h.i.j",
 401                                                          &integer_value));
 402   EXPECT_EQ(1, integer_value);
 403
 404   root.reset(JSONReader::Read("{\"a\":{\"b\":2},\"a.b\":1}"));
 405   ASSERT_TRUE(root.get());
 406   EXPECT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 407   dict_val = static_cast<DictionaryValue*>(root.get());
 408   EXPECT_TRUE(dict_val->GetInteger("a.b", &integer_value));
 409   EXPECT_EQ(2, integer_value);
 410   EXPECT_TRUE(dict_val->GetIntegerWithoutPathExpansion("a.b", &integer_value));
 411   EXPECT_EQ(1, integer_value);
 412
 413   // Invalid, no closing brace
 414   root.reset(JSONReader::Read("{\"a\": true"));
 415   EXPECT_FALSE(root.get());
 416
 417   // Invalid, keys must be quoted
 418   root.reset(JSONReader::Read("{foo:true}"));
 419   EXPECT_FALSE(root.get());
 420
 421   // Invalid, trailing comma
 422   root.reset(JSONReader::Read("{\"a\":true,}"));
 423   EXPECT_FALSE(root.get());
 424
 425   // Invalid, too many commas
 426   root.reset(JSONReader::Read("{\"a\":true,,\"b\":false}"));
 427   EXPECT_FALSE(root.get());
 428   root.reset(JSONReader::Read("{\"a\":true,,\"b\":false}",
 429                               JSON_ALLOW_TRAILING_COMMAS));
 430   EXPECT_FALSE(root.get());
 431
 432   // Invalid, no separator
 433   root.reset(JSONReader::Read("{\"a\" \"b\"}"));
 434   EXPECT_FALSE(root.get());
 435
 436   // Invalid, lone comma.
 437   root.reset(JSONReader::Read("{,}"));
 438   EXPECT_FALSE(root.get());
 439   root.reset(JSONReader::Read("{,}", JSON_ALLOW_TRAILING_COMMAS));
 440   EXPECT_FALSE(root.get());
 441   root.reset(JSONReader::Read("{\"a\":true,,}", JSON_ALLOW_TRAILING_COMMAS));
 442   EXPECT_FALSE(root.get());
 443   root.reset(JSONReader::Read("{,\"a\":true}", JSON_ALLOW_TRAILING_COMMAS));
 444   EXPECT_FALSE(root.get());
 445   root.reset(JSONReader::Read("{\"a\":true,,\"b\":false}",
 446                               JSON_ALLOW_TRAILING_COMMAS));
 447   EXPECT_FALSE(root.get());
 448
 449   // Test stack overflow
 450   std::string evil(1000000, '[');
 451   evil.append(std::string(1000000, ']'));
 452   root.reset(JSONReader::Read(evil));
 453   EXPECT_FALSE(root.get());
 454
 455   // A few thousand adjacent lists is fine.
 456   std::string not_evil("[");
 457   not_evil.reserve(15010);
 458   for (int i = 0; i < 5000; ++i) {
 459     not_evil.append("[],");
 460   }
 461   not_evil.append("[]]");
 462   root.reset(JSONReader::Read(not_evil));
 463   ASSERT_TRUE(root.get());
 464   EXPECT_TRUE(root->IsType(Value::TYPE_LIST));
 465   list = static_cast<ListValue*>(root.get());
 466   EXPECT_EQ(5001U, list->GetSize());
 467
 468   // Test utf8 encoded input
 469   root.reset(JSONReader().ReadToValue("\"\xe7\xbd\x91\xe9\xa1\xb5\""));
 470   ASSERT_TRUE(root.get());
 471   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
 472   str_val.clear();
 473   EXPECT_TRUE(root->GetAsString(&str_val));
 474   EXPECT_EQ(L"\x7f51\x9875", UTF8ToWide(str_val));
 475
 476   root.reset(JSONReader().ReadToValue(
 477       "{\"path\": \"/tmp/\xc3\xa0\xc3\xa8\xc3\xb2.png\"}"));
 478   ASSERT_TRUE(root.get());
 479   EXPECT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 480   EXPECT_TRUE(root->GetAsDictionary(&dict_val));
 481   EXPECT_TRUE(dict_val->GetString("path", &str_val));
 482   EXPECT_EQ("/tmp/\xC3\xA0\xC3\xA8\xC3\xB2.png", str_val);
 483
 484   // Test invalid utf8 encoded input
 485   root.reset(JSONReader().ReadToValue("\"345\xb0\xa1\xb0\xa2\""));
 486   EXPECT_FALSE(root.get());
 487   root.reset(JSONReader().ReadToValue("\"123\xc0\x81\""));
 488   EXPECT_FALSE(root.get());
 489   root.reset(JSONReader().ReadToValue("\"abc\xc0\xae\""));
 490   EXPECT_FALSE(root.get());
 491
 492   // Test utf16 encoded strings.
 493   root.reset(JSONReader().ReadToValue("\"\\u20ac3,14\""));
 494   ASSERT_TRUE(root.get());
 495   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
 496   str_val.clear();
 497   EXPECT_TRUE(root->GetAsString(&str_val));
 498   EXPECT_EQ("\xe2\x82\xac""3,14", str_val);
 499
 500   root.reset(JSONReader().ReadToValue("\"\\ud83d\\udca9\\ud83d\\udc6c\""));
 501   ASSERT_TRUE(root.get());
 502   EXPECT_TRUE(root->IsType(Value::TYPE_STRING));
 503   str_val.clear();
 504   EXPECT_TRUE(root->GetAsString(&str_val));
 505   EXPECT_EQ("\xf0\x9f\x92\xa9\xf0\x9f\x91\xac", str_val);
 506
 507   // Test invalid utf16 strings.
 508   const char* cases[] = {
 509     "\"\\u123\"",  // Invalid scalar.
 510     "\"\\ud83d\"",  // Invalid scalar.
 511     "\"\\u$%@!\"",  // Invalid scalar.
 512     "\"\\uzz89\"",  // Invalid scalar.
 513     "\"\\ud83d\\udca\"",  // Invalid lower surrogate.
 514     "\"\\ud83d\\ud83d\"",  // Invalid lower surrogate.
 515     "\"\\ud83foo\"",  // No lower surrogate.
 516     "\"\\ud83\\foo\""  // No lower surrogate.
 517   };
 518   for (size_t i = 0; i < arraysize(cases); ++i) {
 519     root.reset(JSONReader().ReadToValue(cases[i]));
 520     EXPECT_FALSE(root.get()) << cases[i];
 521   }
 522
 523   // Test literal root objects.
 524   root.reset(JSONReader::Read("null"));
 525   EXPECT_TRUE(root->IsType(Value::TYPE_NULL));
 526
 527   root.reset(JSONReader::Read("true"));
 528   ASSERT_TRUE(root.get());
 529   EXPECT_TRUE(root->GetAsBoolean(&bool_value));
 530   EXPECT_TRUE(bool_value);
 531
 532   root.reset(JSONReader::Read("10"));
 533   ASSERT_TRUE(root.get());
 534   EXPECT_TRUE(root->GetAsInteger(&integer_value));
 535   EXPECT_EQ(10, integer_value);
 536
 537   root.reset(JSONReader::Read("\"root\""));
 538   ASSERT_TRUE(root.get());
 539   EXPECT_TRUE(root->GetAsString(&str_val));
 540   EXPECT_EQ("root", str_val);
 541 }
 542
 543 TEST(JSONReaderTest, ReadFromFile) {
 544   FilePath path;
 545   ASSERT_TRUE(PathService::Get(base::DIR_TEST_DATA, &path));
 546   path = path.AppendASCII("json");
 547   ASSERT_TRUE(base::PathExists(path));
 548
 549   std::string input;
 550   ASSERT_TRUE(ReadFileToString(
 551       path.Append(FILE_PATH_LITERAL("bom_feff.json")), &input));
 552
 553   JSONReader reader;
 554   scoped_ptr<Value> root(reader.ReadToValue(input));
 555   ASSERT_TRUE(root.get()) << reader.GetErrorMessage();
 556   EXPECT_TRUE(root->IsType(Value::TYPE_DICTIONARY));
 557 }
 558
 559 // Tests that the root of a JSON object can be deleted safely while its
 560 // children outlive it.
 561 TEST(JSONReaderTest, StringOptimizations) {
 562   scoped_ptr<Value> dict_literal_0;
 563   scoped_ptr<Value> dict_literal_1;
 564   scoped_ptr<Value> dict_string_0;
 565   scoped_ptr<Value> dict_string_1;
 566   scoped_ptr<Value> list_value_0;
 567   scoped_ptr<Value> list_value_1;
 568
 569   {
 570     scoped_ptr<Value> root(JSONReader::Read(
 571         "{"
 572         "  \"test\": {"
 573         "    \"foo\": true,"
 574         "    \"bar\": 3.14,"
 575         "    \"baz\": \"bat\","
 576         "    \"moo\": \"cow\""
 577         "  },"
 578         "  \"list\": ["
 579         "    \"a\","
 580         "    \"b\""
 581         "  ]"
 582         "}", JSON_DETACHABLE_CHILDREN));
 583     ASSERT_TRUE(root.get());
 584
 585     DictionaryValue* root_dict = NULL;
 586     ASSERT_TRUE(root->GetAsDictionary(&root_dict));
 587
 588     DictionaryValue* dict = NULL;
 589     ListValue* list = NULL;
 590
 591     ASSERT_TRUE(root_dict->GetDictionary("test", &dict));
 592     ASSERT_TRUE(root_dict->GetList("list", &list));
 593
 594     EXPECT_TRUE(dict->Remove("foo", &dict_literal_0));
 595     EXPECT_TRUE(dict->Remove("bar", &dict_literal_1));
 596     EXPECT_TRUE(dict->Remove("baz", &dict_string_0));
 597     EXPECT_TRUE(dict->Remove("moo", &dict_string_1));
 598
 599     ASSERT_EQ(2u, list->GetSize());
 600     EXPECT_TRUE(list->Remove(0, &list_value_0));
 601     EXPECT_TRUE(list->Remove(0, &list_value_1));
 602   }
 603
 604   bool b = false;
 605   double d = 0;
 606   std::string s;
 607
 608   EXPECT_TRUE(dict_literal_0->GetAsBoolean(&b));
 609   EXPECT_TRUE(b);
 610
 611   EXPECT_TRUE(dict_literal_1->GetAsDouble(&d));
 612   EXPECT_EQ(3.14, d);
 613
 614   EXPECT_TRUE(dict_string_0->GetAsString(&s));
 615   EXPECT_EQ("bat", s);
 616
 617   EXPECT_TRUE(dict_string_1->GetAsString(&s));
 618   EXPECT_EQ("cow", s);
 619
 620   EXPECT_TRUE(list_value_0->GetAsString(&s));
 621   EXPECT_EQ("a", s);
 622   EXPECT_TRUE(list_value_1->GetAsString(&s));
 623   EXPECT_EQ("b", s);
 624 }
 625
 626 // A smattering of invalid JSON designed to test specific portions of the
 627 // parser implementation against buffer overflow. Best run with DCHECKs so
 628 // that the one in NextChar fires.
 629 TEST(JSONReaderTest, InvalidSanity) {
 630   const char* invalid_json[] = {
 631       "/* test *",
 632       "{\"foo\"",
 633       "{\"foo\":",
 634       "  [",
 635       "\"\\u123g\"",
 636       "{\n\"eh:\n}",
 637   };
 638
 639   for (size_t i = 0; i < arraysize(invalid_json); ++i) {
 640     JSONReader reader;
 641     LOG(INFO) << "Sanity test " << i << ": <" << invalid_json[i] << ">";
 642     EXPECT_FALSE(reader.ReadToValue(invalid_json[i]));
 643     EXPECT_NE(JSONReader::JSON_NO_ERROR, reader.error_code());
 644     EXPECT_NE("", reader.GetErrorMessage());
 645   }
 646 }
 647
 648 TEST(JSONReaderTest, IllegalTrailingNull) {
 649   const char json[] = { '"', 'n', 'u', 'l', 'l', '"', '\0' };
 650   std::string json_string(json, sizeof(json));
 651   JSONReader reader;
 652   EXPECT_FALSE(reader.ReadToValue(json_string));
 653   EXPECT_EQ(JSONReader::JSON_UNEXPECTED_DATA_AFTER_ROOT, reader.error_code());
 654 }
 655
 656 }  // namespace base