JSTests/es6/Proxy_deleteProperty_handler.js

function test() {

var proxied = {};
  var passed = false;
  delete new Proxy(proxied, {
    deleteProperty: function (t, k) {
      passed = t === proxied && k === "foo";
    }
  }).foo;
  return passed;

}

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