/*______________
| ______ | U I Z E J A V A S C R I P T F R A M E W O R K
| / / | ---------------------------------------------------
| / O / | MODULE : Uize.Test.Performance.TestingForUndefined Class
| / / / |
| / / / /| | ONLINE : http://uize.com
| /____/ /__/_| | COPYRIGHT : (c)2008-2016 UIZE
| /___ | LICENSE : Available under MIT License or GNU General Public License
|_______________| http://uize.com/license.html
*/
/* Module Meta Data
type: Test
importance: 1
codeCompleteness: 100
docCompleteness: 100
*/
/*?
Introduction
The =Uize.Test.Performance.TestingForUndefined= module defines a performance test that compares different approaches to testing for an undefined value.
*DEVELOPERS:* `Chris van Rensburg`
*/
Uize.module ({
name:'Uize.Test.Performance.TestingForUndefined',
builder:function () {
'use strict';
var
_totalIterations = 500000,
_testVariableWithUndefinedValue,
_testVariableWithDefinedValue = 'this is a string value',
_undefinedStr = 'undefined',
_undefined
;
return Uize.Test.resolve ({
title:'Test the performance of different approaches to testing for an undefined value',
test:[
{
title:'typeof myVariable == undefinedStr',
test:[
{
title:'When the variable being tested is undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
typeof _testVariableWithUndefinedValue == _undefinedStr;
}
return true;
}
},
{
title:'When the variable being tested is not undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
typeof _testVariableWithDefinedValue == _undefinedStr;
}
return true;
}
}
]
},
{
title:'typeof myVariable == \'undefined\'',
test:[
{
title:'When the variable being tested is undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
typeof _testVariableWithUndefinedValue == 'undefined';
}
return true;
}
},
{
title:'When the variable being tested is not undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
typeof _testVariableWithDefinedValue == 'undefined';
}
return true;
}
}
]
},
{
title:'myVariable === variableDeliberatelyNotDefined',
test:[
{
title:'When the variable being tested is undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
_testVariableWithUndefinedValue === _undefined;
}
return true;
}
},
{
title:'When the variable being tested is not undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
_testVariableWithDefinedValue === _undefined;
}
return true;
}
}
]
},
{
title:'myVariable === undefined',
test:[
{
title:'When the variable being tested is undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
_testVariableWithUndefinedValue === undefined;
}
return true;
}
},
{
title:'When the variable being tested is not undefined',
test:function () {
for (var _iterationNo = _totalIterations; --_iterationNo >= 0;) {
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
_testVariableWithDefinedValue === undefined;
}
return true;
}
}
]
}
]
});
}
});