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<!DOCTYPE html>
<html>
<!--
Copyright 2008 The Closure Library Authors. All Rights Reserved.
Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<!--
Author: attila@google.com (Attila Bodis)
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.testing.PerformanceTimer</title>
<script src="../base.js"></script>
<script>
goog.require('goog.dom');
goog.require('goog.math');
goog.require('goog.testing.MockClock');
goog.require('goog.testing.PerformanceTimer');
goog.require('goog.testing.jsunit');
</script>
</head>
<body>
<div id="sandbox"></div>
<script>
var mockClock;
var sandbox = document.getElementById('sandbox');
var timer;
// Fast test function, pretty much guaranteed to run in under 5,000ms.
function fastTestFunction() {
for (var i = 0; i < 10; i++) {
var div = document.createElement('div');
div.innerHTML = 'Div no. ' + i;
sandbox.appendChild(div);
}
}
function setUp() {
mockClock = new goog.testing.MockClock(true);
timer = new goog.testing.PerformanceTimer();
}
function tearDown() {
mockClock.dispose();
timer = null;
goog.dom.removeChildren(sandbox);
}
function testConstructor() {
assertTrue('Timer must be an instance of goog.testing.PerformanceTimer',
timer instanceof goog.testing.PerformanceTimer);
assertEquals('Timer must collect the default number of samples', 10,
timer.getNumSamples());
assertEquals('Timer must have the default timeout interval', 5000,
timer.getTimeoutInterval());
}
function testRun_noSetUpOrTearDown() {
runAndAssert(false, false);
}
function testRun_withSetup() {
runAndAssert(true, false);
}
function testRun_withTearDown() {
runAndAssert(false, true);
}
function testRun_withSetUpAndTearDown() {
runAndAssert(true, true);
}
function runAndAssert(useSetUp, useTearDown) {
var fakeExecutionTime = [100, 95, 98, 104, 130, 101, 96, 98, 90, 103]
var count = 0;
var testFunction = function() {
mockClock.tick(fakeExecutionTime[count++]);
};
var setUpCount = 0;
var setUpFunction = function() {
// Should have no effect on total time.
mockClock.tick(7);
setUpCount++;
};
var tearDownCount = 0;
var tearDownFunction = function() {
// Should have no effect on total time.
mockClock.tick(11);
tearDownCount++;
};
// Fast test function should complete successfully in under 5 seconds...
var task = new goog.testing.PerformanceTimer.Task(testFunction);
if (useSetUp) {
task.withSetUp(setUpFunction);
}
if (useTearDown) {
task.withTearDown(tearDownFunction);
}
var results = timer.runTask(task);
assertNotNull('Results must be available.', results);
assertEquals('Average is wrong.',
goog.math.average.apply(null, fakeExecutionTime), results['average']);
assertEquals('Standard deviation is wrong.',
goog.math.standardDeviation.apply(null, fakeExecutionTime),
results['standardDeviation']);
assertEquals('Count must be as expected.', 10, results['count']);
assertEquals('Maximum is wrong.', 130, results['maximum']);
assertEquals('Mimimum is wrong.', 90, results['minimum']);
assertEquals('Total must be a nonnegative number.',
goog.math.sum.apply(null, fakeExecutionTime), results['total']);
assertEquals('Set up count must be as expected.',
useSetUp ? 10 : 0, setUpCount);
assertEquals('Tear down count must be as expected.',
useTearDown ? 10 : 0, tearDownCount);
}
function testTimeout() {
var count = 0;
var testFunction = function() {
mockClock.tick(100);
++count;
};
timer.setNumSamples(200);
timer.setTimeoutInterval(2500);
var results = timer.run(testFunction);
assertNotNull('Results must be available', results);
assertEquals('Count is wrong', count, results['count']);
assertTrue('Count must less than expected',
results['count'] < timer.getNumSamples());
}
function testCreateResults() {
var samples = [53, 0, 103];
var expectedResults = {
'average': 52,
'count': 3,
'maximum': 103,
'minimum': 0,
'standardDeviation': goog.math.standardDeviation.apply(null, samples),
'total': 156
};
assertObjectEquals(
expectedResults,
goog.testing.PerformanceTimer.createResults(samples));
}
</script>
</body>
</html>
|
