Added testing of multiple files upload.

[mtabacman]

No description provided.

[codecov]

Codecov Report

Merging #45 (ace609a) into release-candidate (cff4925) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@                Coverage Diff                 @@
##           release-candidate      #45   +/-   ##
==================================================
  Coverage              99.62%   99.62%           
==================================================
  Files                     53       53           
  Lines                   2924     2944   +20     
==================================================
+ Hits                    2913     2933   +20     
  Misses                    11       11           

Impacted Files	Coverage Δ
...minal-Model-Tests/AddMultiPartCommandTest.class.st	100.00% <100.00%> (ø)
.../Superluminal-Model-Tests/HttpRequestTest.class.st	100.00% <100.00%> (ø)

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