When resolving URL, empty relative URL should remove ref component....

src/url_canon_unittest.cc

 // Copyright 2007, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 1718 matching lines @@
     bool is_base_file;     // Tells us if the base is a file URL.
     const char* test;      // Input URL to test against.
     bool succeed_relative; // Whether we expect IsRelativeURL to succeed
     bool is_rel;           // Whether we expect |test| to be relative or not.
     bool succeed_resolve;  // Whether we expect ResolveRelativeURL to succeed.
     const char* resolved;  // What we expect in the result when resolving.
   } rel_cases[] = {
       // Basic absolute input.
     {"http://host/a", true, false, "http://another/", true, false, false, NULL},
     {"http://host/a", true, false, "http:////another/", true, false, false, NULL},
-      // Empty relative URLs shouldn't change the input.
+      // Empty relative URLs should only remove the ref part of the URL,
+      // leaving the rest unchanged.
     {"http://foo/bar", true, false, "", true, true, true, "http://foo/bar"},
+    {"http://foo/bar#ref", true, false, "", true, true, true, "http://foo/bar"},
+    {"http://foo/bar#", true, false, "", true, true, true, "http://foo/bar"},
       // Spaces at the ends of the relative path should be ignored.
     {"http://foo/bar", true, false, "  another  ", true, true, true, "http://foo/another"},
     {"http://foo/bar", true, false, "  .  ", true, true, true, "http://foo/"},
     {"http://foo/bar", true, false, " \t ", true, true, true, "http://foo/bar"},
       // Matching schemes without two slashes are treated as relative.
     {"http://host/a", true, false, "http:path", true, true, true, "http://host/path"},
     {"http://host/a/", true, false, "http:path", true, true, true, "http://host/a/path"},
     {"http://host/a", true, false, "http:/path", true, true, true, "http://host/path"},
     {"http://host/a", true, false, "HTTP:/path", true, true, true, "http://host/path"},
       // Nonmatching schemes are absolute.
@@ skipping 176 matching lines @@
   url_canon::StdStringCanonOutput repl_output(&repl_str);
   url_canon::ReplaceFileURL(src, parsed, repl, NULL, &repl_output, &repl_parsed);
   repl_output.Complete();
 
   // Generate the expected string and check.
   std::string expected("file:///foo?");
   for (size_t i = 0; i < new_query.length(); i++)
     expected.push_back('a');
   EXPECT_TRUE(expected == repl_str);
 }