Escape invalid code points

base/json/string_escape_unittest.cc

 // 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"},
+      {"\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"},
+      {"\xF3\xBF\xBF\xBF", "\xEF\xBF\xBD"},
   };
 
   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));
@@ skipping 141 matching lines @@
   }
 
   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