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| 25 | <div id="content">
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| 26 |
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| 27 | <h2>Type Constraints (NUnit 2.4)</h2>
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| 28 |
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| 29 | <p>Type constraints perform tests that are specific to Types.
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| 30 | The following type constraints are provided:
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| 31 |
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| 32 | <table class="constraints">
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| 33 | <tr><th>Syntax Helper</th><th>Constructor</th><th>Operation</th></tr>
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| 34 | <tr><td>Is.TypeOf( Type )</td><td>ExactTypeConstraint( Type )</td></td><td>tests that an object is an exact Type</td></tr>
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| 35 | <tr><td>Is.InstanceOfType( Type )</td><td>InstanceOfTypeConstraint( Type )</td></td><td>tests that an object is an instance of a Type</td></tr>
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| 36 | <tr><td>Is.AssignableFrom( Type )</td><td>AssignableFromConstraint( Type )</td></td><td>tests that one type is assignable from another</td></tr>
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| 37 | </table>
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| 38 |
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| 39 | <h4>Examples of Use</h4>
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| 40 |
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| 41 | <div class="code"><pre>
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| 42 | Assert.That("Hello", Is.TypeOf(typeof(string)));
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| 43 | Assert.That("Hello", Is.Not.TypeOf(typeof(int)));
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| 44 |
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| 45 | Assert.That("Hello", Is.InstanceOfType(typeof(string)));
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| 46 | Assert.That(5, Is.Not.InstanceOfType(typeof(string)));
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| 47 |
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| 48 | Assert.That( "Hello", Is.AssignableFrom(typeof(string)));
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| 49 | Assert.That( 5, Is.Not.AssignableFrom(typeof(string)));
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| 50 |
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| 51 | // Using inheritance
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| 52 | Expect( 5, Not.InstanceOfType(typeof(string)));
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| 53 | Expect( "Hello", AssignableFrom(typeOf(string)));
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| 54 | </pre></div>
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| 66 | <li><a href="constraintModel.html">Constraints</a></li>
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| 67 | <ul>
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| 68 | <li><a href="equalConstraint.html">Equal Constraint</a></li>
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| 69 | <li><a href="sameasConstraint.html">SameAs Constraint</a></li>
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