Buffer array resample and reference_data

[wheeheee]

On top of #621

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.13%. Comparing base (06f8776) to head (6154e85).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #623      +/-   ##
==========================================
+ Coverage   97.97%   98.13%   +0.16%     
==========================================
  Files          19       19              
  Lines        3254     3277      +23     
==========================================
+ Hits         3188     3216      +28     
+ Misses         66       61       -5     

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[martinholters]

I generally like DRYing up code by pulling out common code to functions, but those then need a descriptive name to maintain readability. I'm not sure that's always the case here. That aside, this PR increases LOC by 49, 6 of which are a new tests, some are additional usings in the tests (to make those file runable by themselves, I suppose). But that still leaves quite a few additional lines due to NFC code re-organization, where I'm not 100% sure it's a net improvement. Need to let this sink in a bit more.

Meanwhile, some minor remarks.

[wheeheee]

Huh, macOS and 32-bit failures? Weird.

[martinholters]

LGTM except for minor nits.

[wheeheee]

If we could use in! the LOAD_PATH thing would be nicer but sadly that's new in 1.11.