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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/json/string_escape.h"
#include <stddef.h>
#include "base/macros.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
TEST(JSONStringEscapeTest, EscapeUTF8) {
const struct {
const char* to_escape;
const char* escaped;
} cases[] = {
{"\b\001aZ\"\\wee", "\\b\\u0001aZ\\\"\\\\wee"},
{"a\b\f\n\r\t\v\1\\.\"z",
"a\\b\\f\\n\\r\\t\\u000B\\u0001\\\\.\\\"z"},
{"b\x0f\x7f\xf0\xff!", // \xf0\xff is not a valid UTF-8 unit.
"b\\u000F\x7F\xEF\xBF\xBD\xEF\xBF\xBD!"},
{"c<>d", "c\\u003C>d"},
{"Hello\xe2\x80\xa8world", "Hello\\u2028world"},
{"\xe2\x80\xa9purple", "\\u2029purple"},
};
for (size_t i = 0; i < arraysize(cases); ++i) {
const char* in_ptr = cases[i].to_escape;
std::string in_str = in_ptr;
std::string out;
EscapeJSONString(in_ptr, false, &out);
EXPECT_EQ(std::string(cases[i].escaped), out);
EXPECT_TRUE(IsStringUTF8(out));
out.erase();
bool convert_ok = EscapeJSONString(in_str, false, &out);
EXPECT_EQ(std::string(cases[i].escaped), out);
EXPECT_TRUE(IsStringUTF8(out));
if (convert_ok) {
std::string fooout = GetQuotedJSONString(in_str);
EXPECT_EQ("\"" + std::string(cases[i].escaped) + "\"", fooout);
EXPECT_TRUE(IsStringUTF8(out));
}
}
std::string in = cases[0].to_escape;
std::string out;
EscapeJSONString(in, false, &out);
EXPECT_TRUE(IsStringUTF8(out));
// test quoting
std::string out_quoted;
EscapeJSONString(in, true, &out_quoted);
EXPECT_EQ(out.length() + 2, out_quoted.length());
EXPECT_EQ(out_quoted.find(out), 1U);
EXPECT_TRUE(IsStringUTF8(out_quoted));
// now try with a NULL in the string
std::string null_prepend = "test";
null_prepend.push_back(0);
in = null_prepend + in;
std::string expected = "test\\u0000";
expected += cases[0].escaped;
out.clear();
EscapeJSONString(in, false, &out);
EXPECT_EQ(expected, out);
EXPECT_TRUE(IsStringUTF8(out));
}
TEST(JSONStringEscapeTest, EscapeUTF16) {
const struct {
const wchar_t* to_escape;
const char* escaped;
} cases[] = {
{L"b\uffb1\u00ff", "b\xEF\xBE\xB1\xC3\xBF"},
{L"\b\001aZ\"\\wee", "\\b\\u0001aZ\\\"\\\\wee"},
{L"a\b\f\n\r\t\v\1\\.\"z",
"a\\b\\f\\n\\r\\t\\u000B\\u0001\\\\.\\\"z"},
{L"b\x0f\x7f\xf0\xff!", "b\\u000F\x7F\xC3\xB0\xC3\xBF!"},
{L"c<>d", "c\\u003C>d"},
{L"Hello\u2028world", "Hello\\u2028world"},
{L"\u2029purple", "\\u2029purple"},
};
for (size_t i = 0; i < arraysize(cases); ++i) {
string16 in = WideToUTF16(cases[i].to_escape);
std::string out;
EscapeJSONString(in, false, &out);
EXPECT_EQ(std::string(cases[i].escaped), out);
EXPECT_TRUE(IsStringUTF8(out));
out = GetQuotedJSONString(in);
EXPECT_EQ("\"" + std::string(cases[i].escaped) + "\"", out);
EXPECT_TRUE(IsStringUTF8(out));
}
string16 in = WideToUTF16(cases[0].to_escape);
std::string out;
EscapeJSONString(in, false, &out);
EXPECT_TRUE(IsStringUTF8(out));
// test quoting
std::string out_quoted;
EscapeJSONString(in, true, &out_quoted);
EXPECT_EQ(out.length() + 2, out_quoted.length());
EXPECT_EQ(out_quoted.find(out), 1U);
EXPECT_TRUE(IsStringUTF8(out));
// now try with a NULL in the string
string16 null_prepend = WideToUTF16(L"test");
null_prepend.push_back(0);
in = null_prepend + in;
std::string expected = "test\\u0000";
expected += cases[0].escaped;
out.clear();
EscapeJSONString(in, false, &out);
EXPECT_EQ(expected, out);
EXPECT_TRUE(IsStringUTF8(out));
}
TEST(JSONStringEscapeTest, EscapeUTF16OutsideBMP) {
{
// {a, U+10300, !}, SMP.
string16 test;
test.push_back('a');
test.push_back(0xD800);
test.push_back(0xDF00);
test.push_back('!');
std::string actual;
EXPECT_TRUE(EscapeJSONString(test, false, &actual));
EXPECT_EQ("a\xF0\x90\x8C\x80!", actual);
}
{
// {U+20021, U+2002B}, SIP.
string16 test;
test.push_back(0xD840);
test.push_back(0xDC21);
test.push_back(0xD840);
test.push_back(0xDC2B);
std::string actual;
EXPECT_TRUE(EscapeJSONString(test, false, &actual));
EXPECT_EQ("\xF0\xA0\x80\xA1\xF0\xA0\x80\xAB", actual);
}
{
// {?, U+D800, @}, lone surrogate.
string16 test;
test.push_back('?');
test.push_back(0xD800);
test.push_back('@');
std::string actual;
EXPECT_FALSE(EscapeJSONString(test, false, &actual));
EXPECT_EQ("?\xEF\xBF\xBD@", actual);
}
}
TEST(JSONStringEscapeTest, EscapeBytes) {
const struct {
const char* to_escape;
const char* escaped;
} cases[] = {
{"b\x0f\x7f\xf0\xff!", "b\\u000F\\u007F\\u00F0\\u00FF!"},
{"\xe5\xc4\x4f\x05\xb6\xfd", "\\u00E5\\u00C4O\\u0005\\u00B6\\u00FD"},
};
for (size_t i = 0; i < arraysize(cases); ++i) {
std::string in = std::string(cases[i].to_escape);
EXPECT_FALSE(IsStringUTF8(in));
EXPECT_EQ(std::string(cases[i].escaped),
EscapeBytesAsInvalidJSONString(in, false));
EXPECT_EQ("\"" + std::string(cases[i].escaped) + "\"",
EscapeBytesAsInvalidJSONString(in, true));
}
const char kEmbedNull[] = { '\xab', '\x39', '\0', '\x9f', '\xab' };
std::string in(kEmbedNull, arraysize(kEmbedNull));
EXPECT_FALSE(IsStringUTF8(in));
EXPECT_EQ(std::string("\\u00AB9\\u0000\\u009F\\u00AB"),
EscapeBytesAsInvalidJSONString(in, false));
}
} // namespace base
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