text: ["localStorage", "sessionStorage"].forEach(function(name) {
      test(function() {
          var storage = window[name];
          storage.clear();
  
          storage.setItem("name", "user1");
          assert_equals(storage.getItem("name"), "user1");
  
          storage.removeItem("name");
          storage.removeItem("unknown");
          assert_equals(storage.getItem("name"), null, "storage.getItem('name')")
      }, name + ".removeItem()");
  
      test(function() {
          var storage = window[name];
          storage.clear();
  
          storage.setItem("name", "user1");
          assert_equals(storage.getItem("name"), "user1");
          delete storage["name"];
          delete storage["unknown"];
          assert_equals(storage.getItem("name"), null, "storage.getItem('name')")
      }, "delete " + name + "[]");
  
      test(function() {
          var storage = window[name];
          storage.clear();
  
          storage.setItem("null", "test");
          assert_true("null" in storage);
          storage.removeItem(null);
          assert_false("null" in storage);
      }, name + ".removeItem(null)");
  
      test(function() {
          var storage = window[name];
          storage.clear();
  
          storage.setItem("undefined", "test");
          assert_true("undefined" in storage);
          storage.removeItem(undefined);
          assert_false("undefined" in storage);
      }, name + ".removeItem(undefined)");
  });
  