Unit testing code with a file system dependency

Question

I am writing a component that, given a ZIP file, needs to:

1. Unzip the file.
2. Find a specific dll among the unzipped files.
3. Load that dll thro

Answer 1

Assuming that "file system interactions" are well tested in the framework itself, create your method to work with streams, and test this. Opening a FileStream and passing it to the method can be left out of your tests, as FileStream.Open is well tested by the framework creators.