Add unit tests for ColorF class

[bonimy]

Issue

The ColorF class does not have unit tests for every method. There are a lot of blending options and therefore a lot of tests that need to be written.

Features

Given how sizeable the code is (and that I've made mistakes in it before), having an appropriate set of unit tests for all of it will ensure it's all running properly.

Resolution

First thing that needs to be done is create a task list for which methods still need to be unit tested. Then we need to actually write tests for them.

Task List

• - Create list of which methods need to be tested.