text: /* Any copyright is dedicated to the Public Domain.
   * http://creativecommons.org/licenses/publicdomain/ */
  
  if (typeof Symbol === "function") {
      assertEq(Symbol.keyFor(Symbol.for("moon")), "moon");
      assertEq(Symbol.keyFor(Symbol.for("")), "");
      assertEq(Symbol.keyFor(Symbol("moon")), undefined);
      assertEq(Symbol.keyFor(Symbol.iterator), undefined);
  
      assertThrowsInstanceOf(() => Symbol.keyFor(), TypeError);
      assertThrowsInstanceOf(() => Symbol.keyFor(Object(Symbol("moon"))), TypeError);
  
      assertEq(Symbol.keyFor.length, 1);
  }
  
  if (typeof reportCompare === "function")
      reportCompare(0, 0);
  