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polymer/test/unit/debounce.html

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<!doctype html>
<!--
@license
Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<html>
<head>
<meta charset="utf-8">
<script src="../../../webcomponentsjs/webcomponents-lite.js"></script>
<script src="../../../web-component-tester/browser.js"></script>
<link rel="import" href="../../polymer-mini.html">
</head>
<body>
<script>
HTMLImports.whenReady(function() {
Polymer({is: 'my-element'});
});
setup(function() {
window.el1 = document.createElement('my-element');
document.body.appendChild(window.el1);
window.el2 = document.createElement('my-element');
window.el1.appendChild(window.el2);
});
teardown(function() {
document.body.removeChild(window.el1);
delete window.el1;
delete window.el2;
});
suite('debounce', function() {
test('debounce (no-wait)', function(done) {
var called = 0;
var cb = function() {
called++;
};
window.el1.debounce('foo', cb);
window.el1.debounce('foo', cb);
window.el1.debounce('foo', cb);
setTimeout(function() {
assert.equal(called, 1, 'debounce should be called exactly once');
done();
}, 50);
});
test('debounce (wait)', function(done) {
var called = 0;
var now = Date.now();
var cb = function() {
called++;
};
window.el1.debounce('foo', cb);
window.el1.debounce('foo', cb, 100);
window.el1.debounce('foo', cb, 100);
setTimeout(function() {
assert.equal(called, 1, 'debounce should be called exactly once');
assert(Date.now() - now > 100, 'debounce should be called after at least 100ms');
done();
}, 200);
});
});
</script>
</body>
</html>