test(core-test-framework): increase test coverage to 100%

[sebastijankuzner]

Summary

Solves #4013

Increase core-test-framework coverage to 100 %.

Checklist

• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #4021 into develop will increase coverage by 0.31%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #4021      +/-   ##
===========================================
+ Coverage    98.47%   98.78%   +0.31%     
===========================================
  Files          638      638              
  Lines        14806    14793      -13     
  Branches      1748     1736      -12     
===========================================
+ Hits         14580    14614      +34     
+ Misses         130      104      -26     
+ Partials        96       75      -21     

Flag	Coverage Δ
#functional	6.95% <54.54%> (+0.01%)	⬆️
#integration	11.54% <66.66%> (+0.02%)	⬆️
#unit	96.70% <100.00%> (+0.90%)	⬆️

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Impacted Files	Coverage Δ
...test-framework/src/matchers/functional/rejected.ts	100.00% <ø> (+9.52%)	⬆️
...-framework/src/matchers/functional/vote-balance.ts	100.00% <ø> (+10.00%)	⬆️
...core-test-framework/src/utils/api-inject-client.ts	100.00% <ø> (+7.40%)	⬆️
packages/core-test-framework/src/utils/generic.ts	100.00% <ø> (+10.34%)	⬆️
...ges/core-test-framework/src/app/generators/core.ts	100.00% <100.00%> (+3.33%)	⬆️
...re-test-framework/src/factories/factories/block.ts	100.00% <100.00%> (+7.40%)	⬆️
...t-framework/src/matchers/functional/unconfirmed.ts	100.00% <100.00%> (+84.61%)	⬆️
...s/core-test-framework/src/utils/api-http-client.ts	100.00% <100.00%> (+21.42%)	⬆️
packages/core-test-framework/src/utils/api.ts	100.00% <100.00%> (+2.58%)	⬆️
...re-test-framework/src/utils/transaction-factory.ts	100.00% <100.00%> (+1.13%)	⬆️
... and 8 more

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