Added fuel efficiency unit

[aidbal]

No description provided.

[codecov-io]

Codecov Report

Merging #703 into master will decrease coverage by 0.1%.
The diff coverage is 45.6%.

@@            Coverage Diff             @@
##           master     #703      +/-   ##
==========================================
- Coverage   58.34%   58.24%   -0.11%     
==========================================
  Files         165      166       +1     
  Lines       37450    37757     +307     
==========================================
+ Hits        21852    21992     +140     
- Misses      15598    15765     +167

Impacted Files	Coverage Δ
UnitsNet/GeneratedCode/UnitAbbreviationsCache.g.cs	100% <ø> (ø)	⬆️
UnitsNet/GeneratedCode/UnitConverter.g.cs	100% <100%> (ø)	⬆️
...tsNet/GeneratedCode/Quantities/FuelEfficiency.g.cs	43.72% <43.72%> (ø)
UnitsNet/GeneratedCode/Quantity.g.cs	81.49% <80%> (-0.02%)	⬇️

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[aidbal]

@angularsen Hey, any suggestions on how to improve coverage on auto generated tests? Shall we lower the bar?

[angularsen]

Hi @aidbal, the codecov thing is quite new and I sure didn't add the new demands for 58.34% coverage so that must be something it's figured out on its own :-) You can disregard this. Test coverage is not your concern for the generated code part at least, but if you had added any custom code then tests should be added for that. I don't see any in this PR, so don't mind this for now.

I'll try to get to reviewing this soon.

[angularsen]

A few minor things, the rest looks good!

[angularsen]

As for coverage, I think what you are seeing is that generated code for a new quantity is lower than the code coverage of the entire codebase. So when adding a new quantity, it automatically reduces the overall coverage percentage. I've started some small steps in improving coverage by moving test cases to the code generator so that we can properly test N quantities and M units instead of a handful picked ones. Things should improve then.

[angularsen]

Release UnitsNet/4.36.0 · angularsen/UnitsNet