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// Copyright 2013 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Tests for goog.labs.style.PixelDensityMonitor.
*
*/
goog.provide('goog.labs.style.PixelDensityMonitorTest');
goog.setTestOnly('goog.labs.style.PixelDensityMonitorTest');
goog.require('goog.array');
goog.require('goog.dom.DomHelper');
goog.require('goog.events');
goog.require('goog.labs.style.PixelDensityMonitor');
goog.require('goog.testing.MockControl');
goog.require('goog.testing.jsunit');
goog.require('goog.testing.recordFunction');
var fakeWindow;
var recordFunction;
var monitor;
var mockControl;
var mediaQueryLists;
function setUp() {
recordFunction = goog.testing.recordFunction();
mediaQueryLists = [];
mockControl = new goog.testing.MockControl();
}
function tearDown() {
mockControl.$verifyAll();
goog.dispose(monitor);
goog.dispose(recordFunction);
}
function setUpMonitor(initialRatio, hasMatchMedia) {
fakeWindow = {devicePixelRatio: initialRatio};
if (hasMatchMedia) {
// Every call to matchMedia should return a new media query list with its
// own set of listeners.
fakeWindow.matchMedia = function(query) {
var listeners = [];
var newList = {
addListener: function(listener) { listeners.push(listener); },
removeListener: function(listener) {
goog.array.remove(listeners, listener);
},
callListeners: function() {
for (var i = 0; i < listeners.length; i++) {
listeners[i]();
}
},
getListenerCount: function() { return listeners.length; }
};
mediaQueryLists.push(newList);
return newList;
};
}
var domHelper = mockControl.createStrictMock(goog.dom.DomHelper);
domHelper.getWindow().$returns(fakeWindow);
mockControl.$replayAll();
monitor = new goog.labs.style.PixelDensityMonitor(domHelper);
goog.events.listen(
monitor, goog.labs.style.PixelDensityMonitor.EventType.CHANGE,
recordFunction);
}
function setNewRatio(newRatio) {
fakeWindow.devicePixelRatio = newRatio;
for (var i = 0; i < mediaQueryLists.length; i++) {
mediaQueryLists[i].callListeners();
}
}
function testNormalDensity() {
setUpMonitor(1, false);
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.NORMAL, monitor.getDensity());
}
function testHighDensity() {
setUpMonitor(1.5, false);
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.HIGH, monitor.getDensity());
}
function testNormalDensityIfUndefined() {
setUpMonitor(undefined, false);
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.NORMAL, monitor.getDensity());
}
function testChangeEvent() {
setUpMonitor(1, true);
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.NORMAL, monitor.getDensity());
monitor.start();
setNewRatio(2);
var call = recordFunction.popLastCall();
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.HIGH,
call.getArgument(0).target.getDensity());
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.HIGH, monitor.getDensity());
setNewRatio(1);
call = recordFunction.popLastCall();
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.NORMAL,
call.getArgument(0).target.getDensity());
assertEquals(
goog.labs.style.PixelDensityMonitor.Density.NORMAL, monitor.getDensity());
}
function testListenerIsDisposed() {
setUpMonitor(1, true);
monitor.start();
assertEquals(1, mediaQueryLists.length);
assertEquals(1, mediaQueryLists[0].getListenerCount());
goog.dispose(monitor);
assertEquals(1, mediaQueryLists.length);
assertEquals(0, mediaQueryLists[0].getListenerCount());
}
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