Conversion between pressure measurement references

[sequc82]

Based off the proposal in #422, and building upon the work of @gratestas in Units by @YektaMirkan.

Adds a wrapper class called ReferencePressure and an enum PressureReference to provide a reference for pressure measurements.

public enum PressureReference
    {
        Undefined = 0,
        Absolute,
        Gauge,
        Vacuum,
    }

Utilizes two constructors for implementation:

ReferencePressure refPressure = new ReferencePressure(Pressure.fromAtmospheres(3));
ReferencePressure refPressure = new ReferencePressure(Pressure.fromAtmospheres(3), PressureReference.Gauge);

The single-parameter constructor sets the PressureReference parameter to a default of PressureReference.Absolute

As @gratestas mentioned in #422, implementation uses the example:

double pressure = refPressure.Gauge.Atmosphere;

Extended the work of @gratestas with further testing, and handling of exceptions regarding pressures less than absolute zero.

[angularsen]

Awesome work, love the tests!
I got some feedback for you to consider.

[codecov-io]

Codecov Report

Merging #726 into master will increase coverage by 0.05%.
The diff coverage is 96.36%.

@@            Coverage Diff             @@
##           master     #726      +/-   ##
==========================================
+ Coverage   58.51%   58.56%   +0.05%     
==========================================
  Files         170      171       +1     
  Lines       38375    38430      +55     
==========================================
+ Hits        22454    22507      +53     
- Misses      15921    15923       +2

Impacted Files	Coverage Δ
UnitsNet/CustomCode/Wrappers/ReferencePressure.cs	96.36% <96.36%> (ø)

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[angularsen]

Yes, not necessarily word by word, just describe the parameters and what they will be used for.

…

[sequc82]

I added a ctor overload for a third parameter: the atmospheric pressure referenced for conversion between Absolute, Gauge, and Vacuum. Otherwise, ReferencePressure would always assume 1 atm.

[angularsen]

I'll try to get a look at this tomorrow.

[sequc82]

@angularsen, based on your comment in #724, would it be best to move the code in Pressure.Wrapper.cs and the PressureReference enum into Pressure.extra.cs?

[angularsen]

A couple minor things, but it's looking good!

[angularsen]

I think this is getting ready, just a few more minor things.

[angularsen]

Awesome, great work!

Nuget is on the way out.

Release UnitsNet/4.42.0 · angularsen/UnitsNet