Increase unit tests coverage for AMM

[Bronek]

High Level Overview of Change

Increase unit test coverage

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (non-breaking change that only restructures code)
• Performance (increase or change in throughput and/or latency)
• Tests (you added tests for code that already exists, or your new feature included in this PR)
• Documentation update
• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
• Release

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.99%. Comparing base (61672ad) to head (4898c52).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4967   +/-   ##
========================================
  Coverage    76.98%   76.99%           
========================================
  Files         1129     1129           
  Lines       131872   131887   +15     
  Branches     39662    39673   +11     
========================================
+ Hits        101521   101544   +23     
+ Misses       24476    24469    -7     
+ Partials      5875     5874    -1     

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[Bronek]

Made redundant by #4971