105 строки
3.6 KiB
HTML
105 строки
3.6 KiB
HTML
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<title>NUnit - TypeConstraints</title>
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<h2>Type Constraints (NUnit 2.4)</h2>
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<p>Type constraints perform tests that are specific to Types.
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The following type constraints are provided:
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<table class="constraints">
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<tr><th>Syntax Helper</th><th>Constructor</th><th>Operation</th></tr>
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<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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<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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<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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</table>
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<h4>Examples of Use</h4>
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<div class="code"><pre>
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Assert.That("Hello", Is.TypeOf(typeof(string)));
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Assert.That("Hello", Is.Not.TypeOf(typeof(int)));
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Assert.That("Hello", Is.InstanceOfType(typeof(string)));
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Assert.That(5, Is.Not.InstanceOfType(typeof(string)));
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Assert.That( "Hello", Is.AssignableFrom(typeof(string)));
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Assert.That( 5, Is.Not.AssignableFrom(typeof(string)));
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// Using inheritance
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Expect( 5, Not.InstanceOfType(typeof(string)));
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Expect( "Hello", AssignableFrom(typeOf(string)));
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</pre></div>
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