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
9namespace base {
10
11TEST(JSONWriterTest, Writing) {
12  // Test null
13  Value* root = Value::CreateNullValue();
14  std::string output_js;
15  JSONWriter::Write(root, &output_js);
16  ASSERT_EQ("null", output_js);
17  delete root;
18
19  // Test empty dict
20  root = new DictionaryValue;
21  JSONWriter::Write(root, &output_js);
22  ASSERT_EQ("{}", output_js);
23  delete root;
24
25  // Test empty list
26  root = new ListValue;
27  JSONWriter::Write(root, &output_js);
28  ASSERT_EQ("[]", output_js);
29  delete root;
30
31  // Test Real values should always have a decimal or an 'e'.
32  root = new FundamentalValue(1.0);
33  JSONWriter::Write(root, &output_js);
34  ASSERT_EQ("1.0", output_js);
35  delete root;
36
37  // Test Real values in the the range (-1, 1) must have leading zeros
38  root = new FundamentalValue(0.2);
39  JSONWriter::Write(root, &output_js);
40  ASSERT_EQ("0.2", output_js);
41  delete root;
42
43  // Test Real values in the the range (-1, 1) must have leading zeros
44  root = new FundamentalValue(-0.8);
45  JSONWriter::Write(root, &output_js);
46  ASSERT_EQ("-0.8", output_js);
47  delete root;
48
49  // Writer unittests like empty list/dict nesting,
50  // list list nesting, etc.
51  DictionaryValue root_dict;
52  ListValue* list = new ListValue;
53  root_dict.Set("list", list);
54  DictionaryValue* inner_dict = new DictionaryValue;
55  list->Append(inner_dict);
56  inner_dict->SetInteger("inner int", 10);
57  ListValue* inner_list = new ListValue;
58  list->Append(inner_list);
59  list->Append(new FundamentalValue(true));
60
61  // Test the pretty-printer.
62  JSONWriter::Write(&root_dict, &output_js);
63  ASSERT_EQ("{\"list\":[{\"inner int\":10},[],true]}", output_js);
64  JSONWriter::WriteWithOptions(&root_dict, JSONWriter::OPTIONS_PRETTY_PRINT,
65                               &output_js);
66  // The pretty-printer uses a different newline style on Windows than on
67  // other platforms.
68#if defined(OS_WIN)
69#define JSON_NEWLINE "\r\n"
70#else
71#define JSON_NEWLINE "\n"
72#endif
73  ASSERT_EQ("{" JSON_NEWLINE
74            "   \"list\": [ {" JSON_NEWLINE
75            "      \"inner int\": 10" JSON_NEWLINE
76            "   }, [  ], true ]" JSON_NEWLINE
77            "}" JSON_NEWLINE,
78            output_js);
79#undef JSON_NEWLINE
80
81  // Test keys with periods
82  DictionaryValue period_dict;
83  period_dict.SetWithoutPathExpansion("a.b", new FundamentalValue(3));
84  period_dict.SetWithoutPathExpansion("c", new FundamentalValue(2));
85  DictionaryValue* period_dict2 = new DictionaryValue;
86  period_dict2->SetWithoutPathExpansion("g.h.i.j", new FundamentalValue(1));
87  period_dict.SetWithoutPathExpansion("d.e.f", period_dict2);
88  JSONWriter::Write(&period_dict, &output_js);
89  ASSERT_EQ("{\"a.b\":3,\"c\":2,\"d.e.f\":{\"g.h.i.j\":1}}", output_js);
90
91  DictionaryValue period_dict3;
92  period_dict3.Set("a.b", new FundamentalValue(2));
93  period_dict3.SetWithoutPathExpansion("a.b", new FundamentalValue(1));
94  JSONWriter::Write(&period_dict3, &output_js);
95  ASSERT_EQ("{\"a\":{\"b\":2},\"a.b\":1}", output_js);
96
97  // Test omitting binary values.
98  root = BinaryValue::CreateWithCopiedBuffer("asdf", 4);
99  JSONWriter::WriteWithOptions(root, JSONWriter::OPTIONS_OMIT_BINARY_VALUES,
100                               &output_js);
101  ASSERT_TRUE(output_js.empty());
102  delete root;
103
104  ListValue binary_list;
105  binary_list.Append(new FundamentalValue(5));
106  binary_list.Append(BinaryValue::CreateWithCopiedBuffer("asdf", 4));
107  binary_list.Append(new FundamentalValue(2));
108  JSONWriter::WriteWithOptions(&binary_list,
109                               JSONWriter::OPTIONS_OMIT_BINARY_VALUES,
110                               &output_js);
111  ASSERT_EQ("[5,2]", output_js);
112
113  DictionaryValue binary_dict;
114  binary_dict.Set("a", new FundamentalValue(5));
115  binary_dict.Set("b", BinaryValue::CreateWithCopiedBuffer("asdf", 4));
116  binary_dict.Set("c", new FundamentalValue(2));
117  JSONWriter::WriteWithOptions(&binary_dict,
118                               JSONWriter::OPTIONS_OMIT_BINARY_VALUES,
119                               &output_js);
120  ASSERT_EQ("{\"a\":5,\"c\":2}", output_js);
121
122  // Test allowing a double with no fractional part to be written as an integer.
123  FundamentalValue double_value(1e10);
124  JSONWriter::WriteWithOptions(
125      &double_value,
126      JSONWriter::OPTIONS_OMIT_DOUBLE_TYPE_PRESERVATION,
127      &output_js);
128  ASSERT_EQ("10000000000", output_js);
129}
130
131}  // namespace base
132