hat( aDouble, Is.Not.NaN );
</pre></div>

<h3>EmptyConstraint</h3>

<h4>Action</h4>
<p>Tests that an object is an empty string, directory or collection.

<h4>Constructor</h4>
<div class="code"><pre class="prettyprint">
EmptyConstraint()
</pre></div>

<h4>Syntax</h4>
<div class="code"><pre class="prettyprint">
Is.Empty
</pre></div>

<h4>Examples of Use</h4>
<div class="code"><pre class="prettyprint">
Assert.That( aString, Is.Empty );
Assert.Thst( dirInfo, Is.Empty );
Assert.That( collection, Is.Empty );
</pr