Add test about redacting an Event that has not been sent

[bmarty]

Closes #2855

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.07%. Comparing base (9d4cfd8) to head (38d6e08).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2858      +/-   ##
===========================================
+ Coverage    74.06%   74.07%   +0.01%     
===========================================
  Files         1530     1530              
  Lines        36542    36542              
  Branches      7055     7055              
===========================================
+ Hits         27064    27068       +4     
+ Misses        5791     5787       -4     
  Partials      3687     3687              

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[github-actions]

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[jmartinesp]

Thanks!