Take care!

ProGasCasMash

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This provides plain-Java classes that “mimic” the whole Servlet API for precisely this purpose - and to make testing of web-applications less of a pain. You might find this a useful alternative or supplement to StrutsTestCase.

ObMimic covers all of the Servlet API’s interfaces and abstract classes and completely implements all of their methods. It does this with plain Java objects that are fully configurable, fully inspectable, and have some additional features to help in testing (e.g. record/examine the Servlet API calls made to each object, report any ambiguous or questionable Servlet API calls, switch between Servlet 2.3, 2.4, 2.5).

In particular, it does fully implement ServletContext.getResourceAsStream, so you could now test this outside of a container. Your test code can programmatically control what resource is to be returned for any given path, supplying this as a file, byte array, classpath resource, or a URL, or by specifing a root directory whose files are to be taken as the context’s resources. You can even configure it to return an InputStream that throws IOExceptions when read, so that you can test any corresponding error handling.

Because ObMimic can handle even more complex uses of the API (e.g. request-dispatcher “forwards” and “includes”, listener notifications, servlet mappings, filter chains etc), you might also be able to use it not just for pure “unit” testing but also for testing more extensive paths through your code.

As of May/June 2008 this is in private “beta” release, but if you want to take a look at it just let me know and we’ll set you up. For more details, see my recent blog posting.