Refactor movetest.py

[lieryan]

Description

Some refactoring on movetest.py, adding type hints, and misc.

Checklist (delete if not relevant):

• I have added tests that prove my fix is effective or that my feature works
• I have updated CHANGELOG.md

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.88%. Comparing base (186f2ed) to head (3be1fd4).
Report is 20 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #785      +/-   ##
==========================================
+ Coverage   94.86%   94.88%   +0.01%     
==========================================
  Files         135      135              
  Lines       26405    26403       -2     
==========================================
+ Hits        25050    25053       +3     
+ Misses       1355     1350       -5     

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