text: //@ runBigIntEnabled
  
  function assert(a) {
      if (!a)
          throw new Error("Bad assertion");
  }
  
  (() => {
      let p = Object.getOwnPropertyDescriptor(BigInt, "asUintN");
  
      assert(p.enumerable === false);
      assert(p.configurable === true);
      assert(p.writable === true);
  })();
  
  (() => {
      let p = Object.getOwnPropertyDescriptor(BigInt, "asIntN");
  
      assert(p.enumerable === false);
      assert(p.configurable === true);
      assert(p.writable === true);
  })();
  
  