Mock time.Time

[PossibleLlama]

Is your feature request related to a problem? Please describe.
Occasionally, the tests fail because the mocks are expecting the time to be a millisecond before the actual time.

Describe the solution you'd like
Use an interface for the time functions we need, and then mock them out when testing.

Additional context
This only needs to be in place for unit tests, everything else will use the real implementation.