it("should error for a missing url", () => {
   item = instance.tokenizeUrl(item, {field: "missing", dest: "url_toks"});
   assert.equal(item, null);
 });
 it("should tokenize the not strip the leading non-wwww token from a url", () => {
   item = instance.tokenizeUrl(item, {field: "url2", dest: "url_toks"});
   assert.deepEqual(
     ["wonder", "example", "com", "dir1", "dir2a", "dir2b", "dir3", "4", "key1", "key2", "val2", "key3", "amp", "3", "4"],
     item.url_toks);
 });