fix: 21882: Corner cases for merkle tree hashing

[artemananiev]

Fixes: #21882
Signed-off-by: Artem Ananev [email protected]

[lfdt-bot]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...wirlds/virtualmap/internal/hash/VirtualHasher.java	80.00%	0 Missing and 1 partial ⚠️

@@             Coverage Diff              @@
##               main   #21910      +/-   ##
============================================
+ Coverage     70.58%   70.61%   +0.02%     
- Complexity    24329    24341      +12     
============================================
  Files          2673     2673              
  Lines        104200   104202       +2     
  Branches      10936    10937       +1     
============================================
+ Hits          73547    73579      +32     
+ Misses        26597    26571      -26     
+ Partials       4056     4052       -4     

Files with missing lines	Coverage Δ	Complexity Δ
...wirlds/virtualmap/internal/hash/VirtualHasher.java	87.11% <80.00%> (+0.11%)	41.00 <1.00> (ø)

... and 23 files with indirect coverage changes

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[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.03% (target: -1.00%)	✅ 100.00%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (a9240a4)	104105	77557	74.50%
Head commit (ea5731a)	104107 (+2)	77585 (+28)	74.52% (+0.03%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#21910)	5	5	100.00%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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