96 lines
3.5 KiB
HTML
96 lines
3.5 KiB
HTML
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<title>NUnit - ExtensionTips</title>
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<h3>Tips for Writing Extensions</h3>
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<p>An Extenders Guide will be published in the future. At the moment, writing an
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extension is a bit of an adventure. Extension authors are advised to join the
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nunit-developer list and post questions and comments there.
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<p>For the moment, the following tips may be of assistance.
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<ul>
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<li>The <b>nunit.core.interfaces</b> assembly is intended to be stable in the future
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while the <b>nunit.core</b> assembly will change from release to release. Right now,
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both assemblies are still in flux, but extensions that depend solely on the interfaces
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assembly will have a much better chance of surviving NUnit version changes. Unfortunately,
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this is rather difficult to do without duplicating a great deal of NUnit code. Most
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of the add-in samples provided with NUnit are currently version dependent.
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<li>If you place the definition of a custom attribute in the same assembly as your
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add-in, then user tests are dependent on the add-in assembly. If the add-in is
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version-dependent, then the user tests will also be version-dependent. We suggest
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placing any types referenced by user tests in a separate assembly, particularly if
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your extension relies on nunit.core.
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<li>If using Visual Studio, set Copy Local to false for any references to nunit.core
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or nunit.core.interfaces. This is especially important if you are also building
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NUnit itself.
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<li>There is currently no mechanism to allow decorators to apply in a particular order.
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NUnit applies decorators in the order in which they are returned through reflection,
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which may vary among different runtimes.
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<li>Avoid trying to "stretch" the existing extension points to do more than they were
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intended to do. Rather, let us know what further extension points you would like to see!
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