JSTests/es6/WeakMap_no_WeakMap.prototype.clear_method.js

function test() {

if (!("clear" in WeakMap.prototype)) {
  return true;
}
var m = new WeakMap();
var key = {};
m.set(key, 2);
m.clear();
return m.has(key);
      
}

if (!test())
    throw new Error("Test failed");