This is an implementation of a simple file tree built with Idiomatic functional Javascript <3. Its looks like the below screenshot. All of the implementation is in this file and its very readable :) ...

Now we can import and overwrite the os module. This allows us to make all file interactions use our virtual tree. Mocking the file system is a typical task when writing unit tests. It is necessary to ...

My simple example is a script written in Groovy that renames files. For simplicity’s sake, ... There are other examples of walking the file tree with Java 7 available online.