[SPIKE+] Make a plan for how to write a unittest for ModelRunner

[ChenyuLInx]

Description

make a plan for how to write a unit test for the ModelRunner, and implement it if possible.
This may require:

• mocking adapter
• utils/fixtures to generate manifest that we already have
• Mocking logging system to capture logging behavior

This is not amid to have a completely tested ModelRunner. The goal should be to have a good understanding of what utils/fixtures are best for a runner's needs. And have one example to follow.

[ChenyuLInx]

Blocked on

• mocking the adapters: this should be part of the Spike
• mocking the logger