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 14 TEST(JSONWriterTest, BasicTypes) { 15 std::string output_js; 16 17 // Test null. 18 EXPECT_TRUE(JSONWriter::Write(*Value::CreateNullValue(), &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 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(MakeUnique<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 90 TEST(JSONWriterTest, KeysWithPeriods) { 91 std::string output_js; 92 93 DictionaryValue period_dict; 94 period_dict.SetIntegerWithoutPathExpansion("a.b", 3); 95 period_dict.SetIntegerWithoutPathExpansion("c", 2); 96 std::unique_ptr<DictionaryValue> period_dict2(new DictionaryValue()); 97 period_dict2->SetIntegerWithoutPathExpansion("g.h.i.j", 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.SetIntegerWithoutPathExpansion("a.b", 1); 105 EXPECT_TRUE(JSONWriter::Write(period_dict3, &output_js)); 106 EXPECT_EQ("{\"a\":{\"b\":2},\"a.b\":1}", output_js); 107 } 108 109 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(BinaryValue::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(BinaryValue::CreateWithCopiedBuffer("asdf", 4)); 122 binary_list.Append(MakeUnique<Value>(5)); 123 binary_list.Append(BinaryValue::CreateWithCopiedBuffer("asdf", 4)); 124 binary_list.Append(MakeUnique<Value>(2)); 125 binary_list.Append(BinaryValue::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", BinaryValue::CreateWithCopiedBuffer("asdf", 4)); 133 binary_dict.SetInteger("b", 5); 134 binary_dict.Set("c", BinaryValue::CreateWithCopiedBuffer("asdf", 4)); 135 binary_dict.SetInteger("d", 2); 136 binary_dict.Set("e", BinaryValue::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 } 142 143 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
