Improve test coverage in lift.go

[BooleanCat]

Please provide a brief description of the change.

Improve test coverage in lift.go

Which issue does this change relate to?

N/A.

Contribution checklist.

• I have read and understood the CONTRIBUTING guidelines
• My code is formatted (make check)
• I have run tests (make test)
• All commits in my PR conform to the commit hygiene section
• I have added relevant tests
• I have not added any dependencies

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +1.59% 🎉

Comparison is base (619dbc8) 98.40% compared to head (498d357) 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##             main       #51      +/-   ##
===========================================
+ Coverage   98.40%   100.00%   +1.59%     
===========================================
  Files          19        19              
  Lines         376       376              
===========================================
+ Hits          370       376       +6     
+ Misses          4         0       -4     
+ Partials        2         0       -2     

see 1 file with indirect coverage changes

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