TEST-#15: Add get_history and apply_history tests

[valerieyip]

What do these changes do?

• Fixes bugs with record transformation (resolves #16 , resolves #18 )
• Adds tests for get_history and apply_history

• [X] commit message follows format outlined here
• [] passes flake8 .
• [X] passes black --check .
• [X] signed commit with git commit -s
• [x] Resolves #15
• [X] tests added and passing

[richardlin047]

Reformatted with black, no changes to the test code were needed.