json_writer_unittest.cc revision 3345a6884c488ff3a535c2c9acdd33d74b37e311 
1// Copyright (c) 2010 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, false, &output_js);
16  ASSERT_EQ("null", output_js);
17  delete root;
18
19  // Test empty dict
20  root = new DictionaryValue;
21  JSONWriter::Write(root, false, &output_js);
22  ASSERT_EQ("{}", output_js);
23  delete root;
24
25  // Test empty list
26  root = new ListValue;
27  JSONWriter::Write(root, false, &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 = Value::CreateRealValue(1.0);
33  JSONWriter::Write(root, false, &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 = Value::CreateRealValue(0.2);
39  JSONWriter::Write(root, false, &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 = Value::CreateRealValue(-0.8);
45  JSONWriter::Write(root, false, &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(Value::CreateBooleanValue(true));
60
61  // Test the pretty-printer.
62  JSONWriter::Write(&root_dict, false, &output_js);
63  ASSERT_EQ("{\"list\":[{\"inner int\":10},[],true]}", output_js);
64  JSONWriter::Write(&root_dict, true, &output_js);
65  // The pretty-printer uses a different newline style on Windows than on
66  // other platforms.
67#if defined(OS_WIN)
68#define JSON_NEWLINE "\r\n"
69#else
70#define JSON_NEWLINE "\n"
71#endif
72  ASSERT_EQ("{" JSON_NEWLINE
73            "   \"list\": [ {" JSON_NEWLINE
74            "      \"inner int\": 10" JSON_NEWLINE
75            "   }, [  ], true ]" JSON_NEWLINE
76            "}" JSON_NEWLINE,
77            output_js);
78#undef JSON_NEWLINE
79
80  // Test keys with periods
81  DictionaryValue period_dict;
82  period_dict.SetWithoutPathExpansion("a.b", Value::CreateIntegerValue(3));
83  period_dict.SetWithoutPathExpansion("c", Value::CreateIntegerValue(2));
84  DictionaryValue* period_dict2 = new DictionaryValue;
85  period_dict2->SetWithoutPathExpansion("g.h.i.j",
86                                        Value::CreateIntegerValue(1));
87  period_dict.SetWithoutPathExpansion("d.e.f", period_dict2);
88  JSONWriter::Write(&period_dict, false, &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", Value::CreateIntegerValue(2));
93  period_dict3.SetWithoutPathExpansion("a.b", Value::CreateIntegerValue(1));
94  JSONWriter::Write(&period_dict3, false, &output_js);
95  ASSERT_EQ("{\"a\":{\"b\":2},\"a.b\":1}", output_js);
96}
97
98}  // namespace base
99