Add tests for ALS load/save

[mdekstrand]

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[codeclimate]

Code Climate has analyzed commit 8883f52 and detected 0 issues on this pull request.

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[codecov]

Codecov Report

Merging #207 (8883f52) into master (7148846) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #207   +/-   ##
=======================================
  Coverage   92.52%   92.52%           
=======================================
  Files          43       43           
  Lines        3971     3971           
=======================================
  Hits         3674     3674           
  Misses        297      297           

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