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