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<h2>Comparison Constraints (NUnit 2.4 / 2.5)</h2>
<p>Comparison constraints are able to test whether one value
is greater or less than another. Comparison constraints work
on numeric values, as well as other objects that implement the
<b>IComparable</b> interface or - beginning with NUnit 2.5 -
<b>IComparable<T></b>.
<p>Beginning with NUnit 2.5, you may supply your own comparison
algorithm through the <b>Using</b> modifier.
<h3>GreaterThanConstraint</h3>
<h4>Action</h4>
<p>Tests that one value is greater than another.
<h4>Constructor</h4>
<div class="code"><pre>
GreaterThanConstraint(object expected)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.GreaterThan(object expected)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...Using(IComparer comparer)
...Using<T>(IComparer<T> comparer)
...Using<T>(Comparison<T> comparer)
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
Assert.That(7, Is.GreaterThan(3));
Assert.That(myOwnObject,
Is.GreaterThan(theExpected).Using(myComparer));
</pre></div>
<h3>GreaterThanOrEqualConstraint</h3>
<h4>Action</h4>
<p>Tests that one value is greater than or equal to another.
<h4>Constructor</h4>
<div class="code"><pre>
GreaterThanOrEqualConstraint(object expected)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.GreaterThanOrEqualTo(object expected)
Is.AtLeast(object expected)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...Using(IComparer comparer)
...Using<T>(IComparer<T> comparer)
...Using<T>(Comparison<T> comparer)
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
Assert.That(7, Is.GreaterThanOrEqualTo(3));
Assert.That(7, Is.AtLeast(3));
Assert.That(7, Is.GreaterThanOrEqualTo(7));
Assert.That(7, Is.AtLeast(7));
Assert.That(myOwnObject,
Is.GreaterThanOrEqualTo(theExpected).Using(myComparer));
</pre></div>
<h3>LessThanConstraint</h3>
<h4>Action</h4>
<p>Tests that one value is less than another.
<h4>Constructor</h4>
<div class="code"><pre>
LessThanConstraint(object expected)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.LessThan(object expected)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...Using(IComparer comparer)
...Using<T>(IComparer<T> comparer)
...Using<T>(Comparison<T> comparer)
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
Assert.That(3, Is.LessThan(7));
Assert.That(myOwnObject,
Is.LessThan(theExpected).Using(myComparer));
</pre></div>
<h3>LessThanOrEqualConstraint</h3>
<h4>Action</h4>
<p>Tests that one value is less than or equal to another.
<h4>Constructor</h4>
<div class="code"><pre>
LessThanOrEqualConstraint(object expected)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.LessThanOrEqualTo(object expected)
Is.AtMost(object expected)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...Using(IComparer comparer)
...Using<T>(IComparer<T> comparer)
...Using<T>(Comparison<T> comparer)
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
Assert.That(3, Is.LessThanOrEqualTo(7));
Assert.That(3, Is.AtMost(7));
Assert.That(3, Is.LessThanOrEqualTo(3));
Assert.That(3, Is.AtMost(3));
Assert.That(myOwnObject,
Is.LessThanOrEqualTo(theExpected).Using(myComparer));
</pre></div>
<h3>RangeConstraint</h3>
<h4>Action</h4>
<p>
<h4>Constructor</h4>
<div class="code"><pre>
RangeConstraint(IComparable from, IComparable to)
</pre></div>
<h4>Syntax</h4>
<div class="code"><pre>
Is.InRange(IComparable from, IComparable to)
</pre></div>
<h4>Modifiers</h4>
<div class="code"><pre>
...Using(IComparer comparer)
...Using<T>(IComparer<T> comparer)
...Using<T>(Comparison<T> comparer)
</pre></div>
<h4>Examples of Use</h4>
<div class="code"><pre>
int[] iarray = new int[] { 1, 2, 3 }
Assert.That( 42, Is.InRange(1, 100) );
Assert.That( iarray, Is.All.InRange(1, 3) );
Assert.That(myOwnObject,
Is.InRange(lowExpected, highExpected).Using(myComparer));
</pre></div>
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