Add a unit test for FGAtmosphere
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* Fix `SetTemperatureSL()` and `SetPressureSL()` which did not update the sea level density and speed of sound. * Make `Reng` a non `static` member (see JSBSim-Team#666). This was useless and prevented `Reng` from being accessed when JSBSim was compiled as a DLL.
Codecov Report
@@ Coverage Diff @@
## master #857 +/- ##
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+ Coverage 22.43% 23.07% +0.63%
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Files 167 167
Lines 19608 19609 +1
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+ Hits 4400 4525 +125
+ Misses 15208 15084 -124
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* [WIP] Add a unit test for `FGAtmosphere` * Bug fixes * Fix `SetTemperatureSL()` and `SetPressureSL()` which did not update the sea level density and speed of sound. * Make `Reng` a non `static` member (see JSBSim-Team#666). This was useless and prevented `Reng` from being accessed when JSBSim was compiled as a DLL. * Forgot `JSBSIM_API`. * Increased the code coverage and fixed some bugs in the process.
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This PR adds a unit test for the
FGAtmosphereclass in preparation for further changes that will address the topics mentioned in #666 (comment) (static members & methods) and #815 (comment) (MSIS atmospheric model).The unit test in this PR will provide a means to check that no regressions will be introduced by future changes to
FGAtmosphere.In the process of writing this unit test, the following bugs have been discovered and fixed:
FGAtmosphere::InitModel(),ViscosityandKinematicViscositywere computed beforeSLTemperaturewas initialized resulting in incorrect values of air viscosity.FGAtmosphere::Calculate()the density was ignoring the values from the propertiesatmosphere/override/temperatureoratmosphere/override/pressureif one or both of these features were used.FGAtmosphere::SetPressureSL(),SLdensitywas not updated despite the fact thatSLpressurewas modified.FGAtmosphere::SetTemperatureSL(),SLdensityandSLsoundspeedwere not updated despite the fact thatSLtemperaturewas modified.ConvertToRankine,ConvertFromPSF, etc.) now always raise an exception. Previously, some conversion routines silently swallowed the error returning null temperatures or pressures in the process. And as has been discussed in issue FGStandardAtmosphere:CalculatePressureAltitude() can cause NaN values #815, null temperature and pressure are evil !FGAtmospheredid not initialize its members: that stage was defered to the call toInitModel(). This is evil because you never know what code might be executed between the construction and the call toInitModel().