Implement testing

[WilkinsonK]

What are you looking for?

As a developer, and as one that uses open source software, it is appreciated when a project has unit tests to prove that it is working as intended.

What is required to fulfill the needful?

Unit testing requires that our application, and it's API is broken down into a series of tests to prove it's functionality. We require the following to complete this task:

• Selecting a framework to run testing (e.g. pytest).
• Break down the internal API into tests to prove each works as expected.
• {optional} Add test coverage.

Additional Notes

Tests can probably be broken down into the following subsections:

• DICOM manipulation
• REST interaction
• PyOHIF I/O utility