Refactor and regression tests

[obalunenko]

No description provided.

[codecov]

Codecov Report

Merging #34 (3afc645) into master (c0b0f70) will decrease coverage by 8.49%.
The diff coverage is 84.93%.

@@            Coverage Diff             @@
##           master      #34      +/-   ##
==========================================
- Coverage   80.96%   72.47%   -8.50%     
==========================================
  Files          14       18       +4     
  Lines        1035     1097      +62     
==========================================
- Hits          838      795      -43     
- Misses        130      231     +101     
- Partials       67       71       +4     

Impacted Files	Coverage Δ
cmd/aoc-cli/main.go	7.33% <33.33%> (ø)
internal/puzzles/solutions/2020/day01/solution.go	83.87% <44.44%> (-0.75%)	⬇️
internal/puzzles/solver.go	77.77% <62.50%> (+18.88%)	⬆️
internal/puzzles/solutions/2020/day02/solution.go	85.71% <80.55%> (-4.43%)	⬇️
internal/puzzles/utils/intcomputer/intcomputer.go	60.81% <83.33%> (+0.53%)	⬆️
internal/puzzles/solutions/2017/day01/solution.go	86.95% <90.90%> (+0.19%)	⬆️
internal/puzzles/solutions/2016/day01/solution.go	81.60% <94.87%> (-0.32%)	⬇️
internal/puzzles/day_string.go	100.00% <100.00%> (ø)
internal/puzzles/solutions/2015/day01/solution.go	83.33% <100.00%> (-1.52%)	⬇️
internal/puzzles/solutions/2018/day01/solution.go	85.18% <100.00%> (-0.53%)	⬇️
... and 8 more

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

84.8% Coverage
0.0% Duplication