/
Assert.html
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Assert.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html xmlns:yui="http://yuilibrary.com/rdf/1.0/yui.rdf#">
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8" />
<title>API: test Assert (YUI Library)</title>
<link rel="stylesheet" type="text/css" href="assets/reset-fonts-grids-min.css" />
<link rel="stylesheet" type="text/css" href="assets/api.css" />
<script type="text/javascript" src="assets/api-js"></script>
<script type="text/javascript" src="assets/ac-js"></script>
</head>
<body id="yahoo-com">
<div id="doc3" class="yui-t2">
<div id="hd">
<h1><a href="http://developer.yahoo.com/yui/" title="Yahoo! UI Library">Yahoo! UI Library</a></h1>
<h3>test <span class="subtitle">3.1.0</span></h3>
<a href="./index.html" title="Yahoo! UI Library">Yahoo! UI Library</a>
> <a href="./module_test.html" title="test">test</a>
> Assert
<form onsubmit="return false">
<div id="propertysearch">
Search: <input autocomplete="off" id="searchinput" />
<div id="searchresults">
</div>
</div>
</form>
</div>
<div id="bd">
<div id="yui-main">
<div class="yui-b">
<form action="#" name="yui-classopts-form" method="get" id="yui-classopts-form">
<fieldset>
<legend>Filters</legend>
<span class="classopts"><input type="checkbox" name="show_private" id="show_private" /> <label for="show_private">Show Private</label></span>
<span class="classopts"><input type="checkbox" name="show_protected" id="show_protected" /> <label for="show_protected">Show Protected</label></span>
<span class="classopts"><input type="checkbox" name="show_deprecated" id="show_deprecated" /> <label for="show_deprecated">Show Deprecated</label></span>
</fieldset>
</form>
<h2>
<code>static</code>
Class <b property="yui:name">Assert</b>
<span class="extends">
</span>
</h2>
<!-- class tree goes here -->
<div class="summary description" property="yui:description">
The Assert object provides functions to test JavaScript values against
known and expected results. Whenever a comparison (assertion) fails,
an error is thrown.
</div>
<div rel="yui:properties" resource="#properties">
<div class="section field details">
<h3 id="properties">Properties</h3>
<div class="content">
<div class="private" rel="yui:property" resource="#property__asserts">
<h4><a name="property__asserts" property="yui:name">_asserts</a>
- <code>private <span property="yui:type">int</span></code>
</h4>
<div class="detail">
<div class="description" property="yui:description">
The number of assertions performed.
</div>
</div>
<hr />
</div>
</div>
</div>
</div>
<div rel="yui:methods" resource="#methods">
<div class="section method details">
<h3 id="methods">Methods</h3>
<div class="content">
<div class="protected" rel="yui:method" resource="#method__formatMessage">
<h4>
<a name="method__formatMessage">_formatMessage</a></h4>
<div class="detail" >
<code>
protected
static
String
<strong property="yui:name">_formatMessage</strong>
(
customMessage
,
defaultMessage
)
</code>
<div class="description" property="yui:description">
Formats a message so that it can contain the original assertion message
in addition to the custom message.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">customMessage</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> The message passed in by the developer.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">defaultMessage</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> The message created by the error by default.</span>
</dd>
</dl>
<dl>
<dt>Returns:
<code property="yui:return">
String
</code></dt>
<dd property="yui:returnInfo">The final error message, containing either or both.</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="protected" rel="yui:method" resource="#method__getCount">
<h4>
<a name="method__getCount">_getCount</a></h4>
<div class="detail" >
<code>
protected
static
void
<strong property="yui:name">_getCount</strong>
(
)
</code>
<div class="description" property="yui:description">
Returns the number of assertions that have been performed.
</div>
<div class="description">
</div>
</div>
<hr />
</div>
<div class="protected" rel="yui:method" resource="#method__increment">
<h4>
<a name="method__increment">_increment</a></h4>
<div class="detail" >
<code>
protected
static
void
<strong property="yui:name">_increment</strong>
(
)
</code>
<div class="description" property="yui:description">
Increments the number of assertions that have been performed.
</div>
<div class="description">
</div>
</div>
<hr />
</div>
<div class="protected" rel="yui:method" resource="#method__reset">
<h4>
<a name="method__reset">_reset</a></h4>
<div class="detail" >
<code>
protected
static
void
<strong property="yui:name">_reset</strong>
(
)
</code>
<div class="description" property="yui:description">
Resets the number of assertions that have been performed to 0.
</div>
<div class="description">
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_areEqual">
<h4>
<a name="method_areEqual">areEqual</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">areEqual</strong>
(
expected
,
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is equal to another. This uses the double equals sign
so type cohersion may occur.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">expected</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The expected value.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The actual value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_areNotEqual">
<h4>
<a name="method_areNotEqual">areNotEqual</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">areNotEqual</strong>
(
unexpected
,
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is not equal to another. This uses the double equals sign
so type cohersion may occur.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">unexpected</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The unexpected value.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The actual value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_areNotSame">
<h4>
<a name="method_areNotSame">areNotSame</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">areNotSame</strong>
(
unexpected
,
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is not the same as another. This uses the triple equals sign
so no type cohersion may occur.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">unexpected</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The unexpected value.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The actual value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_areSame">
<h4>
<a name="method_areSame">areSame</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">areSame</strong>
(
expected
,
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is the same as another. This uses the triple equals sign
so no type cohersion may occur.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">expected</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The expected value.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The actual value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_fail">
<h4>
<a name="method_fail">fail</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">fail</strong>
(
message
)
</code>
<div class="description" property="yui:description">
Forces an assertion error to occur.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display with the failure.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isArray">
<h4>
<a name="method_isArray">isArray</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isArray</strong>
(
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is an array.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isBoolean">
<h4>
<a name="method_isBoolean">isBoolean</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isBoolean</strong>
(
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is a Boolean.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isFalse">
<h4>
<a name="method_isFalse">isFalse</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isFalse</strong>
(
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is false. This uses the triple equals sign
so no type cohersion may occur.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The actual value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isFunction">
<h4>
<a name="method_isFunction">isFunction</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isFunction</strong>
(
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is a function.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isInstanceOf">
<h4>
<a name="method_isInstanceOf">isInstanceOf</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isInstanceOf</strong>
(
expected
,
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is an instance of a particular object. This may return
incorrect results when comparing objects from one frame to constructors in
another frame. For best results, don't use in a cross-frame manner.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">expected</span>
<<span property="yui:type">Function</span>>
</code>
<span property="yui:description"> The function that the object should be an instance of.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The object to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isNaN">
<h4>
<a name="method_isNaN">isNaN</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isNaN</strong>
(
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is not a number.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isNotNaN">
<h4>
<a name="method_isNotNaN">isNotNaN</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isNotNaN</strong>
(
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is not the special NaN value.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isNotNull">
<h4>
<a name="method_isNotNull">isNotNull</a></h4>
<div class="detail" >
<code>
static
void
<strong property="yui:name">isNotNull</strong>
(
actual
,
message
)
</code>
<div class="description" property="yui:description">
Asserts that a value is not null. This uses the triple equals sign
so no type cohersion may occur.
</div>
<div class="description">
<dl rel="yui:parameters">
<dt>Parameters:</dt>
<dd rel="yui:parameter">
<code><span property="yui:name">actual</span>
<<span property="yui:type">Object</span>>
</code>
<span property="yui:description"> The actual value to test.</span>
</dd>
<dd rel="yui:parameter">
<code><span property="yui:name">message</span>
<<span property="yui:type">String</span>>
</code>
<span property="yui:description"> (Optional) The message to display if the assertion fails.</span>
</dd>
</dl>
</div>
</div>
<hr />
</div>
<div class="" rel="yui:method" resource="#method_isNotUndefined">
<h4>
<a name="method_isNotUndefined">isNotUndefined</a></h4>