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test.js
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test.js
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describe("VisibilityChange", function() {
// The entire test suite gets run for each support vendor prefix,
// in addition to the Page Visibility API.
var vendorPrefixes = {
webkit: {
eventName: 'webkitvisibilitychange',
property: 'webkitHidden'
},
ms: {
eventName: 'msvisibilitychange',
property: 'msHidden'
},
moz: {
eventName: 'mozvisibilitychange',
property: 'mozHidden'
},
w3c: {
eventName: 'visibilitychange',
property: 'hidden'
}
};
var documentWithVendorPrefix = function(doc, prefix) {
for (var vendor in vendorPrefixes) {
if (vendorPrefixes[vendor].property in doc[0]) {
delete doc[0][vendorPrefixes[vendor].property]
}
}
doc[0][vendorPrefixes[prefix].property] = false;
return doc
}
for (var vendor in vendorPrefixes) {
describe (vendor, function() {
this.vendor = vendor
this.property = vendorPrefixes[vendor].property
this.eventName = vendorPrefixes[vendor].eventName;
var $rootScope,
$document,
$timeout,
VisibilityChange,
_this = this;
beforeEach(module('visibilityChange'));
beforeEach(inject(function($injector) {
$rootScope = $injector.get('$rootScope');
$document = documentWithVendorPrefix($injector.get('$document'), _this.vendor);
VisibilityChange = $injector.get('VisibilityChange');
$timeout = $injector.get('$timeout');
sinon.spy($rootScope, '$broadcast');
}));
afterEach(function() {
$rootScope.$broadcast.reset();
});
it ('invokes visible callbacks', function() {
var vis = sinon.spy(),
hid = sinon.spy();
VisibilityChange.onVisible(vis);
VisibilityChange.onHidden(hid);
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce(vis);
sinon.assert.notCalled(hid);
});
it ('invokes hidden callbacks', function() {
var vis = sinon.spy(),
hid = sinon.spy();
VisibilityChange.onVisible(vis);
VisibilityChange.onHidden(hid);
$document[0][_this.property] = true;
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce(hid);
sinon.assert.notCalled(vis);
});
it ('invokes change callbacks', function() {
var chg = sinon.spy();
VisibilityChange.onChange(chg);
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce(chg);
sinon.assert.calledWith(chg, true);
chg.reset();
$document[0][_this.property] = true;
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce(chg);
sinon.assert.calledWith(chg, false);
});
it ('broadcasts visible events', function() {
VisibilityChange.configure({broadcast: true});
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce($rootScope.$broadcast);
sinon.assert.calledWith($rootScope.$broadcast, 'pageBecameVisible');
});
it ('broadcasts hidden events', function() {
VisibilityChange.configure({broadcast: true});
$document[0][_this.property] = true;
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce($rootScope.$broadcast);
sinon.assert.calledWith($rootScope.$broadcast, 'pageBecameHidden');
});
it ('broadcasts custom events', function() {
VisibilityChange.configure({
broadcast: {
visible: 'myVisibleEvent',
hidden: 'myHiddenEvent'
}
});
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce($rootScope.$broadcast);
sinon.assert.calledWith($rootScope.$broadcast, 'myVisibleEvent');
$rootScope.$broadcast.reset();
$document[0][_this.property] = true;
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce($rootScope.$broadcast);
sinon.assert.calledWith($rootScope.$broadcast, 'myHiddenEvent');
});
it ('uses default broadcast events if none are given', function() {
VisibilityChange.configure({broadcast: {}});
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce($rootScope.$broadcast);
sinon.assert.calledWith($rootScope.$broadcast, 'pageBecameVisible');
$rootScope.$broadcast.reset();
$document[0][_this.property] = true;
$document.triggerHandler(_this.eventName);
$timeout.flush();
sinon.assert.calledOnce($rootScope.$broadcast);
sinon.assert.calledWith($rootScope.$broadcast, 'pageBecameHidden');
});
it ('throws an error if configuration is invalid', function() {
sinon.spy(VisibilityChange, 'configure');
try {
VisibilityChange.configure();
} catch(e) {
assert.equal(e.message, "undefined is not a valid configuration object");
}
assert.isTrue(VisibilityChange.configure.threw('Error'));
});
});
}
});