chore: tests for skipped lines

[Naumel]

Based on noctilucent/target/coverage/html/src/primitives/mod.rs.html

[codecov]

Codecov Report

Merging #131 (3ac8c84) into main (5b1f229) will increase coverage by 0.9%.
The diff coverage is 71.4%.

Additional details and impacted files

Components	Coverage Δ
Parser	39.5% <ø> (ø)
Intermediate Representation	38.8% <ø> (ø)
Synthesizers	32.4% <ø> (ø)
Other	21.9% <71.4%> (+4.6%)	⬆️

@@           Coverage Diff           @@
##            main    #131     +/-   ##
=======================================
+ Coverage   33.1%   34.0%   +0.9%     
=======================================
  Files         22      22             
  Lines       2820    2848     +28     
  Branches    1340    1348      +8     
=======================================
+ Hits         934     969     +35     
+ Misses       893     880     -13     
- Partials     993     999      +6     

Impacted Files	Coverage Δ
src/errors/mod.rs	59.1% <50.0%> (+42.4%)	⬆️
src/primitives/mod.rs	90.2% <83.3%> (+33.7%)	⬆️

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5b1f229...3ac8c84. Read the comment docs.