Token Negotiator Unit Tests Uplift

[nicktaras]

This task is to review the current unit tests in place and make updates to ensure the functions inputs are creating the correct and expected outputs.

As you work through this task:

• Include TODO's in the core library for any area's that are difficult to test due to the design of the lib
• Record the before and after coverage gained
• Between 50% and 65% coverage should be kept from changes/updates
• Create a PR of changes and tag @nicktaras for code review