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, 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
70TEST(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
108TEST(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
127TEST(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
162TEST(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
175