co♻e: unittest framework for CODESYS

# Contributing to CfUnit

We love your input! We want to make contributing to this project as easy and transparent as possible, whether it's:

Reporting a bug

Discussing the current state of the code

Submitting a fix

Proposing new features

Becoming a maintainer

## We Develop with CODESYS Forge

We use CODESYS Forge to host code, to track issues & feature requests. 

Since CODESYS IDE is currently only using SVN, Pull Requests (PR's) are a bit of an issue currently.

Every code should be checked before submission:

- Does your code have a test in the verifier?

  - No => write a test for the verifier

  - Yes => provide proof that your code and test works

- After peer review and a working unittest in the verifier is provided, the code is eligible for merge in the trunk.

## Any contributions you make will be under the MIT Software License

In short, when you submit code changes, your submissions are understood to be under the same [MIT License](http://choosealicense.com/licenses/mit/) that covers the project. 

Feel free to contact the maintainers if that's a concern.

## Report bugs using Codeys Forge [Tickets]

We use Tickets to track public bugs. Report a bug by [opening a new ticket](https://forge.codesys.com/prj/cfunit/tickets/new); it's that easy!

## Write bug reports with detail, background, and sample code

**Great Bug Reports** tend to have:

- A quick summary and/or background

- Steps to reproduce

  - Be specific!

  - Give sample code if you can.

- What you expected would happen

- What actually happens

- Notes (possibly including why you think this might be happening, or stuff you tried that didn't work)

## Use a Consistent Coding Style

* Never open/edit the trunk code! Instead, create a (local) branch under your own name and make your code adjustmensts there.

* Make sure to keep the library settings and project information as the trunk project, except your version number. 

* Make sure that your CODESYS IDE uses spaces instead of tabs. The default behaviour of the CODESYS IDE is to use tabs so it needs to be changed. See Tools - Options - Text Editor - Editing - Untick "Keep tabs" and set tabwidth to 4 

## License

By contributing, you agree that your contributions will be licensed under its MIT License.

## References

This document was adapted from briandk's excellent [contribution guidelines template](https://gist.github.com/briandk/3d2e8b3ec8daf5a27a62).