Quelle test_proxy_accessors.html Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/dom/bindings/test/test_proxy_accessors.html

<!DOCTYPE HTML>
<html>

<head>
  <meta charset="utf-8">
  <title>Test for Bug 1700052</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1700052">Mozilla Bug 1700052</a>
<p id="display"></p>
<form id="theform"></form>
<pre id="test">
<script>
function expandoTests() {
  // Get a DOM proxy with an expando object. Define/redefine a "foo" getter/setter
  // and ensure the right function is called.

  var obj = document.getElementById("theform");
  var count1 = 0, count2 = 0, count3 = 0;
  var fun1 = function() { count1++; };
  var fun2 = function() { count2++; };
  var fun3 = function() { count3++; };

  Object.defineProperty(obj, "foo", {configurable: true, get: fun1, set: fun1});

  for (var i = 0; i < 100; i++) {
    obj.foo;
    obj.foo = i;
    if (i === 50) {
      Object.defineProperty(obj, "foo", {configurable: true, get: fun2, set: fun2});
    } else if (i === 80) {
      Object.defineProperty(obj, "foo", {configurable: true, get: fun3, set: fun3});
    }
  }

  is(count1, 102, "call count for fun1 must match");
  is(count2, 60, "call count for fun2 must match");
  is(count3, 38, "call count for fun3 must match");
}
expandoTests();

function unshadowedTests() {
  // Same as above, but for non-shadowing properties on the prototype.

  var obj = document.getElementById("theform");
  var proto = Object.getPrototypeOf(obj);

  var count1 = 0, count2 = 0;
  var fun1 = function() { count1++; };
  var fun2 = function() { count2++; };

  for (var i = 0; i < 100; i++) {
    obj.name;
    obj.name = "test";
    if (i === 50) {
      let desc = Object.getOwnPropertyDescriptor(proto, "name");
      desc.get = desc.set = fun1;
      Object.defineProperty(proto, "name", desc);
    }
    if (i === 90) {
      let desc = Object.getOwnPropertyDescriptor(proto, "name");
      desc.get = desc.set = fun2;
      Object.defineProperty(proto, "name", desc);
    }
  }

  is(count1, 80, "call count for fun1 must match");
  is(count2, 18, "call count for fun2 must match");
}
unshadowedTests();
</script>
</pre>
</body>
</html>

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