base/json/json_writer_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_writer.h"
   6 #include "base/values.h"
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace base {
  10
  11 TEST(JSONWriterTest, BasicTypes) {
  12   std::string output_js;
  13
  14   // Test null.
  15   Value* root = Value::CreateNullValue();
  16   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  17   EXPECT_EQ("null", output_js);
  18   delete root;
  19
  20   // Test empty dict.
  21   root = new DictionaryValue;
  22   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  23   EXPECT_EQ("{}", output_js);
  24   delete root;
  25
  26   // Test empty list.
  27   root = new ListValue;
  28   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  29   EXPECT_EQ("[]", output_js);
  30   delete root;
  31
  32   // Test integer values.
  33   root = new FundamentalValue(42);
  34   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  35   EXPECT_EQ("42", output_js);
  36   delete root;
  37
  38   // Test boolean values.
  39   root = new FundamentalValue(true);
  40   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  41   EXPECT_EQ("true", output_js);
  42   delete root;
  43
  44   // Test Real values should always have a decimal or an 'e'.
  45   root = new FundamentalValue(1.0);
  46   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  47   EXPECT_EQ("1.0", output_js);
  48   delete root;
  49
  50   // Test Real values in the the range (-1, 1) must have leading zeros
  51   root = new FundamentalValue(0.2);
  52   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  53   EXPECT_EQ("0.2", output_js);
  54   delete root;
  55
  56   // Test Real values in the the range (-1, 1) must have leading zeros
  57   root = new FundamentalValue(-0.8);
  58   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  59   EXPECT_EQ("-0.8", output_js);
  60   delete root;
  61
  62   // Test String values.
  63   root = new StringValue("foo");
  64   EXPECT_TRUE(JSONWriter::Write(root, &output_js));
  65   EXPECT_EQ("\"foo\"", output_js);
  66   delete root;
  67 }
  68
  69
  70 TEST(JSONWriterTest, NestedTypes) {
  71   std::string output_js;
  72
  73   // Writer unittests like empty list/dict nesting,
  74   // list list nesting, etc.
  75   DictionaryValue root_dict;
  76   ListValue* list = new ListValue;
  77   root_dict.Set("list", list);
  78   DictionaryValue* inner_dict = new DictionaryValue;
  79   list->Append(inner_dict);
  80   inner_dict->SetInteger("inner int", 10);
  81   ListValue* inner_list = new ListValue;
  82   list->Append(inner_list);
  83   list->Append(new FundamentalValue(true));
  84
  85   // Test the pretty-printer.
  86   EXPECT_TRUE(JSONWriter::Write(&root_dict, &output_js));
  87   EXPECT_EQ("{\"list\":[{\"inner int\":10},[],true]}", output_js);
  88   EXPECT_TRUE(JSONWriter::WriteWithOptions(&root_dict,
  89                                            JSONWriter::OPTIONS_PRETTY_PRINT,
  90                                            &output_js));
  91
  92   // The pretty-printer uses a different newline style on Windows than on
  93   // other platforms.
  94 #if defined(OS_WIN)
  95 #define JSON_NEWLINE "\r\n"
  96 #else
  97 #define JSON_NEWLINE "\n"
  98 #endif
  99   EXPECT_EQ("{" JSON_NEWLINE
 100             "   \"list\": [ {" JSON_NEWLINE
 101             "      \"inner int\": 10" JSON_NEWLINE
 102             "   }, [  ], true ]" JSON_NEWLINE
 103             "}" JSON_NEWLINE,
 104             output_js);
 105 #undef JSON_NEWLINE
 106 }
 107
 108 TEST(JSONWriterTest, KeysWithPeriods) {
 109   std::string output_js;
 110
 111   DictionaryValue period_dict;
 112   period_dict.SetWithoutPathExpansion("a.b", new FundamentalValue(3));
 113   period_dict.SetWithoutPathExpansion("c", new FundamentalValue(2));
 114   DictionaryValue* period_dict2 = new DictionaryValue;
 115   period_dict2->SetWithoutPathExpansion("g.h.i.j", new FundamentalValue(1));
 116   period_dict.SetWithoutPathExpansion("d.e.f", period_dict2);
 117   EXPECT_TRUE(JSONWriter::Write(&period_dict, &output_js));
 118   EXPECT_EQ("{\"a.b\":3,\"c\":2,\"d.e.f\":{\"g.h.i.j\":1}}", output_js);
 119
 120   DictionaryValue period_dict3;
 121   period_dict3.Set("a.b", new FundamentalValue(2));
 122   period_dict3.SetWithoutPathExpansion("a.b", new FundamentalValue(1));
 123   EXPECT_TRUE(JSONWriter::Write(&period_dict3, &output_js));
 124   EXPECT_EQ("{\"a\":{\"b\":2},\"a.b\":1}", output_js);
 125 }
 126
 127 TEST(JSONWriterTest, BinaryValues) {
 128   std::string output_js;
 129
 130   // Binary values should return errors unless suppressed via the
 131   // OPTIONS_OMIT_BINARY_VALUES flag.
 132   Value* root = BinaryValue::CreateWithCopiedBuffer("asdf", 4);
 133   EXPECT_FALSE(JSONWriter::Write(root, &output_js));
 134   EXPECT_TRUE(JSONWriter::WriteWithOptions(
 135       root, JSONWriter::OPTIONS_OMIT_BINARY_VALUES, &output_js));
 136   EXPECT_TRUE(output_js.empty());
 137   delete root;
 138
 139   ListValue binary_list;
 140   binary_list.Append(BinaryValue::CreateWithCopiedBuffer("asdf", 4));
 141   binary_list.Append(new FundamentalValue(5));
 142   binary_list.Append(BinaryValue::CreateWithCopiedBuffer("asdf", 4));
 143   binary_list.Append(new FundamentalValue(2));
 144   binary_list.Append(BinaryValue::CreateWithCopiedBuffer("asdf", 4));
 145   EXPECT_FALSE(JSONWriter::Write(&binary_list, &output_js));
 146   EXPECT_TRUE(JSONWriter::WriteWithOptions(
 147       &binary_list, JSONWriter::OPTIONS_OMIT_BINARY_VALUES, &output_js));
 148   EXPECT_EQ("[5,2]", output_js);
 149
 150   DictionaryValue binary_dict;
 151   binary_dict.Set("a", BinaryValue::CreateWithCopiedBuffer("asdf", 4));
 152   binary_dict.Set("b", new FundamentalValue(5));
 153   binary_dict.Set("c", BinaryValue::CreateWithCopiedBuffer("asdf", 4));
 154   binary_dict.Set("d", new FundamentalValue(2));
 155   binary_dict.Set("e", BinaryValue::CreateWithCopiedBuffer("asdf", 4));
 156   EXPECT_FALSE(JSONWriter::Write(&binary_dict, &output_js));
 157   EXPECT_TRUE(JSONWriter::WriteWithOptions(
 158       &binary_dict, JSONWriter::OPTIONS_OMIT_BINARY_VALUES, &output_js));
 159   EXPECT_EQ("{\"b\":5,\"d\":2}", output_js);
 160 }
 161
 162 TEST(JSONWriterTest, DoublesAsInts) {
 163   std::string output_js;
 164
 165   // Test allowing a double with no fractional part to be written as an integer.
 166   FundamentalValue double_value(1e10);
 167   EXPECT_TRUE(JSONWriter::WriteWithOptions(
 168       &double_value,
 169       JSONWriter::OPTIONS_OMIT_DOUBLE_TYPE_PRESERVATION,
 170       &output_js));
 171   EXPECT_EQ("10000000000", output_js);
 172 }
 173
 174 }  // namespace base