Randomized tests for BeaconBlockBodyDeneb round trip.

[sbudella-gco]

Property-based test for BeaconBlockBody serialization round trip, using karalabe-ssz

types.BeaconBlockBody needs a custom generator in order to avoid nil-pointer dereference during serialization, which is not an issue, provided that the same field is deserialized as an empty slice (see also here); indeed, the initial aim was to ensure that serializing nil pointers would not result in a nil pointer after deserialization, which is the reason why the roll function is biased towards returning zero half of the times.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 21.17%. Comparing base (1aff871) to head (c768d7f).
Report is 3 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (1aff871) and HEAD (c768d7f). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (1aff871)	HEAD (c768d7f)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #2466       +/-   ##
===========================================
- Coverage   32.36%   21.17%   -11.20%     
===========================================
  Files         350        3      -347     
  Lines       15592       85    -15507     
  Branches       20       20               
===========================================
- Hits         5047       18     -5029     
+ Misses      10182       66    -10116     
+ Partials      363        1      -362     

see 347 files with indirect coverage changes