Ref T231, Ref T236, Ref T238 improvements based on Unit test

* check for a correct callsign (assert)
* set callsign if missing (fallback)
* resetLastInterpolation - null last inperpolation

src/blackmisc/aviation/aircraftsituation.cpp

@@ -29,6 +29,10 @@ namespace BlackMisc
         CAircraftSituation::CAircraftSituation()
             : m_groundElevation( { 0, nullptr }, CAltitude::MeanSeaLevel) {}
 
+        CAircraftSituation::CAircraftSituation(const CCallsign &correspondingCallsign)
+            : m_correspondingCallsign(correspondingCallsign), m_groundElevation( { 0, nullptr }, CAltitude::MeanSeaLevel)
+        {}
+
         CAircraftSituation::CAircraftSituation(const CCoordinateGeodetic &position, const CHeading &heading, const CAngle &pitch, const CAngle &bank, const CSpeed &gs, const CAltitude &groundElevation)
             : m_position(position), m_heading(heading), m_pitch(pitch),
               m_bank(bank), m_groundSpeed(gs), m_groundElevation(groundElevation)
@@ -167,6 +171,23 @@ namespace BlackMisc
             return 0;
         }
 
+        bool CAircraftSituation::isNull() const
+        {
+            return this->isPositionNull();
+        }
+
+        void CAircraftSituation::setNull()
+        {
+            m_position.setNull();
+            m_pressureAltitude.setNull();
+            m_heading.setNull();
+            m_pitch.setNull();
+            m_bank.setNull();
+            m_groundElevation.setNull();
+            m_groundSpeed.setNull();
+            m_onGroundReliability = CAircraftSituation::OnGroundReliabilityNoSet;
+        }
+
         const QString &CAircraftSituation::isOnGroundAsString() const
         {
             return CAircraftSituation::isOnGroundToString(this->isOnGround());

src/blackmisc/aviation/aircraftsituation.h

@@ -85,6 +85,9 @@ namespace BlackMisc
             //! Default constructor.
             CAircraftSituation();
 
+            //! Constructor with callsign
+            CAircraftSituation(const CCallsign &correspondingCallsign);
+
             //! Comprehensive constructor
             CAircraftSituation(const Geo::CCoordinateGeodetic &position,
                                const CHeading &heading = {},
@@ -117,6 +120,12 @@ namespace BlackMisc
             //! Position null?
             bool isPositionNull() const { return m_position.isNull(); }
 
+            //! Null situation
+            virtual bool isNull() const override;
+
+            //! Set to null
+            void setNull();
+
             //! Set position
             void setPosition(const Geo::CCoordinateGeodetic &position) { m_position = position; }
 

src/blackmisc/simulation/interpolator.cpp

@@ -57,13 +57,20 @@ namespace BlackMisc
             const CInterpolationAndRenderingSetup &setup, const CInterpolationHints &hints,
             CInterpolationStatus &status)
         {
+            Q_ASSERT_X(!m_callsign.isEmpty(), Q_FUNC_INFO, "Missing callsign");
+
             // this code is used by linear and spline interpolator
             status.reset();
             CInterpolationLogger::SituationLog log;
 
             // any data at all?
-            if (m_aircraftSituations.isEmpty()) { return {}; }
+            if (m_aircraftSituations.isEmpty()) { return CAircraftSituation(m_callsign); }
             CAircraftSituation currentSituation = m_lastInterpolation.isNull() ? m_aircraftSituations.front() : m_lastInterpolation;
+            if (currentSituation.getCallsign() != m_callsign)
+            {
+                BLACK_VERIFY_X(false, Q_FUNC_INFO, "Wrong callsign");
+                currentSituation.setCallsign(m_callsign);
+            }
 
             // Update current position by hints' elevation
             // * for XP provided by hints.getElevationProvider at current position
@@ -296,8 +303,12 @@ namespace BlackMisc
         template <typename Derived>
         void CInterpolator<Derived>::addAircraftSituation(const CAircraftSituation &situation)
         {
+            Q_ASSERT_X(!m_callsign.isEmpty(), Q_FUNC_INFO, "Empty callsign");
+            Q_ASSERT_X(situation.getCallsign() == m_callsign, Q_FUNC_INFO, "Wrong callsign");
             if (m_aircraftSituations.isEmpty())
             {
+                this->resetLastInterpolation(); // delete any leftover
+
                 // make sure we have enough situations to do start interpolating immediately without waiting for more updates
                 m_aircraftSituations = { situation, situation };
                 m_aircraftSituations.back().addMsecs(-10000); // number here does
@@ -337,6 +348,12 @@ namespace BlackMisc
                    boolToYesNo(m_lastInterpolation.isNull());
         }
 
+        template<typename Derived>
+        void CInterpolator<Derived>::resetLastInterpolation()
+        {
+            m_lastInterpolation.setNull();
+        }
+
         template <typename Derived>
         void CInterpolator<Derived>::setGroundElevationFromHint(const CInterpolationHints &hints, CAircraftSituation &situation, bool override)
         {

src/blackmisc/simulation/interpolator.h

@@ -82,6 +82,10 @@ namespace BlackMisc
             //! Get an interpolator info string (for debug info)
             QString getInterpolatorInfo() const;
 
+            //! Reset last interpolation to null
+            //! \remark mainly needed in UNIT tests
+            void resetLastInterpolation();
+
         protected:
             Aviation::CAircraftSituationList m_aircraftSituations; //!< recent situations for one aircraft
             Aviation::CAircraftPartsList m_aircraftParts;          //!< recent parts for one aircraft