[INFRA] move test set up function

[Remi-Gau]

• keep the test code base out of the actual code base

[codecov]

Codecov Report

Merging #165 (a8fdc49) into dev (3455032) will decrease coverage by 0.31%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev     #165      +/-   ##
==========================================
- Coverage   81.27%   80.95%   -0.32%     
==========================================
  Files          34       33       -1     
  Lines         657      646      -11     
==========================================
- Hits          534      523      -11     
  Misses        123      123              

Flag	Coverage Δ
unittests	80.95% <ø> (-0.32%)	⬇️

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