Add a function to escape a query part of url

net/base/escape_unittest.cc

 // Copyright (c) 2012 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 <algorithm>
 #include <string>
 
 #include "net/base/escape.h"
 
 #include "base/basictypes.h"
@@ skipping 435 matching lines @@
     { "&lt;", "<" },
     { "&gt;", ">" },
     { "&amp; &", "& &" },
   };
   for (size_t i = 0; i < arraysize(tests); ++i) {
     base::string16 result = UnescapeForHTML(base::ASCIIToUTF16(tests[i].input));
     EXPECT_EQ(base::ASCIIToUTF16(tests[i].expected_output), result);
   }
 }
 
+TEST(EscapeTest, EscapeQueryPart) {
+  ASSERT_EQ(
+    // Escaped
+    "%02%0A%1D%20!%22%23$%25&'()*+,-./0123456789:;"
+    "%3C=%3E?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    "%5B%5C%5D%5E_%60abcdefghijklmnopqrstuvwxyz"
+    "%7B%7C%7D~%7F%80%FF",
+    // Most of the character space we care about, un-escaped
+    EscapeQueryPart(
+      "\x02\n\x1d !\"#$%&'()*+,-./0123456789:;"
+      "<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+      "[\\]^_`abcdefghijklmnopqrstuvwxyz"
+      "{|}~\x7f\x80\xff"));
+  ASSERT_EQ("q=a%7Cb%7Cc", EscapeQueryPart("q=a%7Cb%7Cc"));
+  ASSERT_EQ("q=a%7Cb%7Cc", EscapeQueryPart("q=a|b|c"));
+  ASSERT_EQ("q=a%7Cb%7Cc&q2=1%7C2%7C3", EscapeQueryPart("q=a|b|c&q2=1|2|3"));
+}
+
 
 }  // namespace
 }  // namespace net