tests: Added unit tests for Integration splited send system

[onuratakan]

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[codecov]

Codecov Report

Merging #1606 (60bf630) into master (c3a8ec0) will increase coverage by 0.17%.
The diff coverage is 93.18%.

@@            Coverage Diff             @@
##           master    #1606      +/-   ##
==========================================
+ Coverage   97.57%   97.75%   +0.17%     
==========================================
  Files         133      133              
  Lines       10739    10761      +22     
==========================================
+ Hits        10479    10519      +40     
+ Misses        260      242      -18     

Flag	Coverage Δ
unittests	97.75% <93.18%> (+0.17%)	⬆️

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Impacted Files	Coverage Δ
naruno/apps/remote_app.py	77.03% <88.88%> (+5.03%)	⬆️
tests/unit_tests/test_apps.py	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes

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