1 // Copyright (c) 2013 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/string_escape.h"
6
7 #include <gtest/gtest.h>
8 #include <stddef.h>
9
10 #include "base/macros.h"
11 #include "base/strings/string_util.h"
12 #include "base/strings/utf_string_conversion_utils.h"
13
14 namespace base {
15
TEST(JSONStringEscapeTest,EscapeUTF8)16 TEST(JSONStringEscapeTest, EscapeUTF8) {
17 const struct {
18 const char* to_escape;
19 const char* escaped;
20 } cases[] = {
21 {"\b\001aZ\"\\wee", "\\b\\u0001aZ\\\"\\\\wee"},
22 {"a\b\f\n\r\t\v\1\\.\"z",
23 "a\\b\\f\\n\\r\\t\\u000B\\u0001\\\\.\\\"z"},
24 {"b\x0f\x7f\xf0\xff!", // \xf0\xff is not a valid UTF-8 unit.
25 "b\\u000F\x7F\xEF\xBF\xBD\xEF\xBF\xBD!"},
26 {"c<>d", "c\\u003C>d"},
27 {"Hello\xe2\x80\xa8world", "Hello\\u2028world"},
28 {"\xe2\x80\xa9purple", "\\u2029purple"},
29 };
30
31 for (size_t i = 0; i < arraysize(cases); ++i) {
32 const char* in_ptr = cases[i].to_escape;
33 std::string in_str = in_ptr;
34
35 std::string out;
36 EscapeJSONString(in_ptr, false, &out);
37 EXPECT_EQ(std::string(cases[i].escaped), out);
38 EXPECT_TRUE(IsStringUTF8(out));
39
40 out.erase();
41 bool convert_ok = EscapeJSONString(in_str, false, &out);
42 EXPECT_EQ(std::string(cases[i].escaped), out);
43 EXPECT_TRUE(IsStringUTF8(out));
44
45 if (convert_ok) {
46 std::string fooout = GetQuotedJSONString(in_str);
47 EXPECT_EQ("\"" + std::string(cases[i].escaped) + "\"", fooout);
48 EXPECT_TRUE(IsStringUTF8(out));
49 }
50 }
51
52 std::string in = cases[0].to_escape;
53 std::string out;
54 EscapeJSONString(in, false, &out);
55 EXPECT_TRUE(IsStringUTF8(out));
56
57 // test quoting
58 std::string out_quoted;
59 EscapeJSONString(in, true, &out_quoted);
60 EXPECT_EQ(out.length() + 2, out_quoted.length());
61 EXPECT_EQ(out_quoted.find(out), 1U);
62 EXPECT_TRUE(IsStringUTF8(out_quoted));
63
64 // now try with a NULL in the string
65 std::string null_prepend = "test";
66 null_prepend.push_back(0);
67 in = null_prepend + in;
68 std::string expected = "test\\u0000";
69 expected += cases[0].escaped;
70 out.clear();
71 EscapeJSONString(in, false, &out);
72 EXPECT_EQ(expected, out);
73 EXPECT_TRUE(IsStringUTF8(out));
74 }
75
TEST(JSONStringEscapeTest,EscapeBytes)76 TEST(JSONStringEscapeTest, EscapeBytes) {
77 const struct {
78 const char* to_escape;
79 const char* escaped;
80 } cases[] = {
81 {"b\x0f\x7f\xf0\xff!", "b\\u000F\\u007F\\u00F0\\u00FF!"},
82 {"\xe5\xc4\x4f\x05\xb6\xfd", "\\u00E5\\u00C4O\\u0005\\u00B6\\u00FD"},
83 };
84
85 for (size_t i = 0; i < arraysize(cases); ++i) {
86 std::string in = std::string(cases[i].to_escape);
87 EXPECT_FALSE(IsStringUTF8(in));
88
89 EXPECT_EQ(std::string(cases[i].escaped),
90 EscapeBytesAsInvalidJSONString(in, false));
91 EXPECT_EQ("\"" + std::string(cases[i].escaped) + "\"",
92 EscapeBytesAsInvalidJSONString(in, true));
93 }
94
95 const char kEmbedNull[] = { '\xab', '\x39', '\0', '\x9f', '\xab' };
96 std::string in(kEmbedNull, arraysize(kEmbedNull));
97 EXPECT_FALSE(IsStringUTF8(in));
98 EXPECT_EQ(std::string("\\u00AB9\\u0000\\u009F\\u00AB"),
99 EscapeBytesAsInvalidJSONString(in, false));
100 }
101
102 } // namespace base
103