зеркало из https://github.com/mozilla/gecko-dev.git
76 строки
2.2 KiB
HTML
76 строки
2.2 KiB
HTML
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<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=965992
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-->
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<head>
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<meta charset="utf-8">
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<title>Test for Bug 965992</title>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=965992">Mozilla Bug 965992</a>
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<p id="display"></p>
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<form id="theform"></form>
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<pre id="test">
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<script type="application/javascript">
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// Ensure we are in JIT code and attach IC stubs.
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const iterations = 50;
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function testFoo(obj, expected, kind) {
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for (var i = 0; i < iterations; i++) {
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is(obj.foo, expected, "Looking up an expando should work - " + kind);
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}
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}
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function getPropTests(obj) {
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// Start with a plain data property.
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obj.foo = "bar";
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testFoo(obj, "bar", "plain");
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// Now change it to a scripted getter.
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var count = 0;
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Object.defineProperty(obj, "foo", {get:function() {
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is(this, obj, "Getter should have the proxy as |this|");
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is(arguments.length, 0, "Shouldn't pass arguments to getters");
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count++;
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return 123;
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}, configurable: true});
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testFoo(obj, 123, "scripted getter");
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is(count, iterations, "Should have called the getter enough times");
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// Now try a native getter.
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Object.defineProperty(obj, "foo", {get: Object.prototype.valueOf, configurable: true});
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testFoo(obj, obj, "native getter");
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}
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function getElemTests(obj) {
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// Define two expando properties, then test inline caches for obj[prop]
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// correctly guard on prop being the same.
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var count = 0;
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obj.elem1 = 1;
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Object.defineProperty(obj, "elem2", {get: function() { count++; return 2; }});
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for (var i = 0; i < iterations; i++) {
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var prop = ((i & 1) == 0) ? "elem1" : "elem2";
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is(obj[prop], (i & 1) + 1, "Should return correct property value");
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}
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is(count, iterations / 2, "Should have called the getter enough times");
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}
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var directExpando = document.getElementsByTagName("*");
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var indirectExpando = document.getElementById("theform");
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getPropTests(directExpando);
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getPropTests(indirectExpando);
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getElemTests(indirectExpando);
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getElemTests(directExpando);
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</script>
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</pre>
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</body>
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</html>
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