new URL('') should throw TypeError

url/url_canon_unittest.cc

 // Copyright 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 <errno.h>
 
 #include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "url/third_party/mozilla/url_parse.h"
 #include "url/url_canon.h"
@@ skipping 1972 matching lines @@
     {"http://host/a#b", true, false, "#", true, true, true, "http://host/a#"},
     {"http://host/a?foo=bar#hello", true, false, "#bye", true, true, true, "http://host/a?foo=bar#bye"},
       // Non-hierarchical base: no relative handling. Relative input should
       // error, and if a scheme is present, it should be treated as absolute.
     {"data:foobar", false, false, "baz.html", false, false, false, NULL},
     {"data:foobar", false, false, "data:baz", true, false, false, NULL},
     {"data:foobar", false, false, "data:/base", true, false, false, NULL},
       // Non-hierarchical base: absolute input should succeed.
     {"data:foobar", false, false, "http://host/", true, false, false, NULL},
     {"data:foobar", false, false, "http:host", true, false, false, NULL},
+      // Non-hierarchical base: empty URL should give error.
+    {"data:foobar", false, false, "", false, false, false, NULL},
       // Invalid schemes should be treated as relative.
     {"http://foo/bar", true, false, "./asd:fgh", true, true, true, "http://foo/asd:fgh"},
     {"http://foo/bar", true, false, ":foo", true, true, true, "http://foo/:foo"},
     {"http://foo/bar", true, false, " hello world", true, true, true, "http://foo/hello%20world"},
     {"data:asdf", false, false, ":foo", false, false, false, NULL},
     {"data:asdf", false, false, "bad(':foo')", false, false, false, NULL},
       // We should treat semicolons like any other character in URL resolving
     {"http://host/a", true, false, ";foo", true, true, true, "http://host/;foo"},
     {"http://host/a;", true, false, ";foo", true, true, true, "http://host/;foo"},
     {"http://host/a", true, false, ";/../bar", true, true, true, "http://host/bar"},
@@ skipping 153 matching lines @@
   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);
 }
 
 }  // namespace url