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Fire iron-localstorage-load-empty event when localStorage is cleared from another window #45

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Fire iron-localstorage-load-empty event when localStorage is cleared from another window #45

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2 changes: 1 addition & 1 deletion iron-localstorage.html
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Original file line number Diff line number Diff line change
Expand Up @@ -146,7 +146,7 @@
},

_handleStorage: function(ev) {
if (ev.key == this.name) {
if (ev.key == this.name || !ev.key) {
this._load(true);
}
},
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118 changes: 118 additions & 0 deletions test/external-change.html
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@@ -0,0 +1,118 @@
<!doctype html>
<!--
@license
Copyright (c) 2015 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">
<title>iron-localstorage-external-change</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">

<script src="../../webcomponentsjs/webcomponents.js"></script>
<script src="../../web-component-tester/browser.js"></script>
<link rel="import" href="../iron-localstorage.html">

</head>
<body>

<dom-module id="test-element" is="dom-bind">
<template>
<iron-localstorage id="localstorage" autoSaveDisabled name="iron-localstorage-test" value="{{value}}"></iron-localstorage>
</template>
</dom-module>

<iframe id="myframe" style="display:none"></iframe>

<script>

var testElement;
var externalWindow;
var setLoadEmptyListener;

suite('external-change', function() {

suiteSetup(function() {
Polymer({
is: 'test-element',
properties: {
'value': {
type: Object,
notify: true
}
}
});

// In order to fire the 'storage' event, create a separate window.
externalWindow = document.querySelector('iframe');

// listener function
setLoadEmptyListener = function(done) {
// Any external window that manipulates the localStorage will fire a 'storage' event.
// iron-localstorage listens for this, handles the event and fires iron-localstorage-load-empty
testElement.$.localstorage.addEventListener('iron-localstorage-load-empty', function() {
assert.isNull(testElement.value);
assert.equal(window.localStorage.length, 0);
done();

});
};

});

suiteTeardown(function() {
window.localStorage.clear();
});

setup(function(done) {
// Each test should have its own clean elements.
if (testElement) {
// remove <test-element>
testElement.parentNode.removeChild(testElement);
}

// start with empty local storage
window.localStorage.clear();

// Set test value
window.localStorage.setItem('iron-localstorage-test', '{"foo":"bar"}');

// create (and load) <test-element>
testElement = document.createElement('test-element');
document.body.appendChild(testElement);

// listen for load event and make sure everything is loaded correctly
testElement.$.localstorage.addEventListener('iron-localstorage-load', function () {
var storageValue = JSON.parse(window.localStorage.getItem('iron-localstorage-test'));
assert.equal(testElement.value.foo, storageValue.foo);
assert.equal(testElement.value.foo, 'bar');
done();
});

});


test('clear', function(done) {
setLoadEmptyListener(done);

// clear localStorage initiated by external window
externalWindow.contentWindow.localStorage.clear();
});

test('remove item', function(done) {
setLoadEmptyListener(done);

// remove item initiated by window
externalWindow.contentWindow.localStorage.removeItem('iron-localstorage-test');
});
});

</script>

</body>
</html>
4 changes: 3 additions & 1 deletion test/index.html
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Expand Up @@ -18,9 +18,11 @@
'basic.html',
'raw.html',
'value-binding.html',
'external-change.html',
'basic.html?dom=shadow',
'raw.html?dom=shadow',
'value-binding.html?dom=shadow'
'value-binding.html?dom=shadow',
'external-change.html?dom=shadow'
]);
</script>

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