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<div id="pagetitle"><h1>YUI Library Examples: Test: Asynchronous Event Testing</h1></div>
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<h2>Test: Asynchronous Event Testing</h2>
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<p>
<p>This example shows how to create an asynchronous test with the YUI Test framework for testing browser-based JavaScript code.
A code>Y.Test.Case</code></a> object is created to test the
<code>Y.Anim</code> object. The test waits until the animation is complete
before checking the settings of the animated element.</p> </p>
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<a href="test-async-event-tests_clean.html" target="_blank">View example in new window.</a>
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<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<div id="testLogger"></div>
<div id="testDiv" style="position:absolute;width:10px;height:10px; background-color:red"></div>
<script type="text/javascript">
YUI({base:"../../build/", timeout: 10000}).use("anim", "console", "test",function (Y) {
Y.namespace("example.test");
Y.example.test.AsyncTestCase = new Y.Test.Case({
//name of the test case - if not provided, one is auto-generated
name : "Animation Tests",
//---------------------------------------------------------------------
// Test methods - names must begin with "test"
//---------------------------------------------------------------------
testAnimation : function (){
var myAnim = new Y.Anim({
node: '#testDiv',
to: {
width: 400
},
duration: 3,
easing: Y.Easing.easeOut
});
//assign oncomplete handler
myAnim.on("end", function(){
//tell the TestRunner to resume
this.resume(function(){
Y.Assert.areEqual(document.getElementById("testDiv").offsetWidth, 400, "Width of the DIV should be 400.");
});
}, this, true);
//start the animation
myAnim.run();
//wait until something happens
this.wait();
}
});
//create the console
var r = new Y.Console({
verbose : true,
newestOnTop : false
});
r.render('#testLogger');
//create the logger
Y.Test.Runner.add(Y.example.test.AsyncTestCase);
//run the tests
Y.Test.Runner.run();
});
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Asynchronous Events Test Example</h2>
<p>This example begins by creating a namespace:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
Y.namespace("example.test");
</textarea>
<p>This namespace serves as the core object upon which others will be added (to prevent creating global objects).</p>
<h3>Creating the TestCase</h3>
<p>The first step is to create a new <code>Y.Test.Case</code>object called <code>AsyncTestCase</code>.
To do so, using the <code>Y.Test.Case</code>constructor and pass in an object literal containing information about the tests to be run:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
Y.example.test.AsyncTestCase = new Y.Test.Case({
//name of the test case - if not provided, one is auto-generated
name : "Animation Tests",
//---------------------------------------------------------------------
// Test methods - names must begin with "test"
//---------------------------------------------------------------------
testAnimation : function (){
var myAnim = new Y.Anim({
node: '#testDiv',
to: {
width: 400
},
duration: 3,
easing: Y.Easing.easeOut
});
//assign oncomplete handler
myAnim.on("end", function(){
//tell the TestRunner to resume
this.resume(function(){
Y.Assert.areEqual(document.getElementById("testDiv").offsetWidth, 400, "Width of the DIV should be 400.");
});
}, this, true);
//start the animation
myAnim.run();
//wait until something happens
this.wait();
}
});
</textarea>
<p>The only test in the <code>Y.Test.Case</code>is called <code>testAnimation</code>. It begins by creating a new
<code>Anim</code> object that will animate the width of a <code>div</code> to 400 pixels over three seconds. An
event handler is assigned to the <code>Anim</code> object's <code>end</code> event, within which the
<code>resume()</code> method is called. A function is passed into the <code>resume()</code> method to indicate
the code to run when the test resumes, which is a test to make sure the width is 400 pixels. After that, the
<code>run()</code> method is called to begin the animation and the <code>wait()</code> method is called to
tell the <code>Y.Test.Runner</code> to wait until it is told to resume testing again. When the animation completes,
the <code>end</code> event is fired and the test resumes, assuring that the width is correct.</p>
<h3>Running the tests</h3>
<p>With all of the tests defined, the last step is to run them:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
//create the console
var r = new Y.Console({
verbose : true,
newestOnTop : false
});
r.render('#testLogger');
//create the logger
Y.Test.Runner.add(Y.example.test.AsyncTestCase);
//run the tests
Y.Test.Runner.run();
</textarea>
<p>Before running the tests, it's necessary to create a <code>Y.Console</code> object to display the results (otherwise the tests would run
but you wouldn't see the results). After that, the <code>Y.Test.Runner</code> is loaded with the <code>Y.Test.Case</code>object by calling
<code>add()</code> (any number of <code>Y.Test.Case</code>and <code>TestSuite</code> objects can be added to a <code>Y.Test.Runner</code>,
this example only adds one for simplicity). The very last step is to call <code>run()</code>, which begins executing the tests in its
queue and displays the results in the <code>Y.Console</code>.</p> </div>
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Test Examples:</h4>
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<li><a href='../test/test-simple-example.html'>Simple Testing Example</a></li><li><a href='../test/test-advanced-test-options.html'>Advanced Test Options</a></li><li><a href='../test/test-array-tests.html'>Array Processing</a></li><li><a href='../test/test-async-test.html'>Asynchronous Testing</a></li><li class='selected'><a href='../test/test-async-event-tests.html'>Asynchronous Event Testing</a></li> </ul>
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