Add test data and increase code coverage

[rogerfraser]

No description provided.

[codecov-commenter]

Codecov Report

Merging #113 (0c49c5a) into master (0937be8) will increase coverage by 0.82%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #113      +/-   ##
==========================================
+ Coverage   71.60%   72.43%   +0.82%     
==========================================
  Files         117      117              
  Lines       34210    34222      +12     
==========================================
+ Hits        24497    24788     +291     
+ Misses       9713     9434     -279     

Impacted Files	Coverage Δ
...just/dynadjust/dnageoidwrapper/dnageoidwrapper.cpp	80.97% <100.00%> (+0.33%)	⬆️
dynadjust/dynadjust/dnaimport/dnainterop.cpp	65.22% <100.00%> (+1.93%)	⬆️
dynadjust/dynadjust/dnaadjust/dnaadjust.cpp	86.85% <0.00%> (-0.02%)	⬇️
...ynadjust/include/measurement_types/dnagpspoint.cpp	65.58% <0.00%> (+0.42%)	⬆️
...djust/include/measurement_types/dnagpsbaseline.cpp	65.77% <0.00%> (+0.47%)	⬆️
...ynadjust/include/measurement_types/dnadistance.cpp	66.98% <0.00%> (+0.47%)	⬆️
dynadjust/include/measurement_types/dnaangle.cpp	61.49% <0.00%> (+0.57%)	⬆️
.../include/measurement_types/dnaheightdifference.cpp	64.63% <0.00%> (+0.60%)	⬆️
...nadjust/include/measurement_types/dnadirection.cpp	61.77% <0.00%> (+0.91%)	⬆️
...adjust/include/measurement_types/dnacoordinate.cpp	50.65% <0.00%> (+1.31%)	⬆️
... and 7 more

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