observable-array-no-leak-of-internals.window.js

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This WPT test may be referenced by the following Test IDs:
- /webidl/ecmascript-binding/observable-array-no-leak-of-internals.window.html - WPT Dashboard Interop Dashboard

"use strict";

test(() => {

  const observableArray = document.adoptedStyleSheets;

  let leaked_target = null;

  let leaked_handler = null;

  let target_leaker = (target) => { leaked_target = target; return null; };

  Object.defineProperty(Object.prototype, "getPrototypeOf", {get: function() {

    leaked_handler = this;

    return target_leaker;

}})

  Object.getPrototypeOf(observableArray);

  assert_equals(leaked_target, null, "The proxy target leaked.");

  assert_equals(leaked_handler, null, "The proxy handler leaked.");

}, "ObservableArray's internals won't leak");