Add some tests

[DyspC]

This is an old decompiled / imported / tweaked multiple times project with lots of complex per-character rules that make it hard to find regressions at development time.

That being said it lacks tests:

• Some that run on excerpt constants in the code
• Some that run on text files and apply given methods
  For example:
  src/test/resources/out/file1.methodX.methodY.sample would trigger a test asserting that its content is the same as what methodY(methodX({content of src/test/resources/in/file1.sample}) outputs (don't do reflection there are 3 buttons)

[DyspC]

Note to myself

• Create CONTRIBUTING.md
• Write README.md wtf is that thing supposed to do

[NyorJa]

Can I give this a try? Thanks

[DyspC]

Yeah sure,

If you want me to provide you with some before/after test data don't hesitate and ask me

[NyorJa]

that would be great!thanks again

[DyspC]

Hi, I've put some test files on the 'testing' branch