Ref T270, mark interpolator as unit test

* if we use "recycled" parts, we have to store also the last status
* mark unit test so "recycling" is disabled
* status flag for "reused"

src/blackmisc/simulation/interpolator.cpp

@@ -292,6 +292,8 @@ namespace BlackMisc
             Q_ASSERT_X(m_partsToSituationInterpolationRatio >= 1 && m_partsToSituationInterpolationRatio < 11, Q_FUNC_INFO, "Wrong ratio");
             if (!m_unitTest && !m_lastParts.isNull() && ((m_interpolatedSituationsCounter + aircraftNumber) % m_partsToSituationInterpolationRatio) == 0)
             {
+                m_currentPartsStatus = m_lastPartsStatus;
+                m_currentPartsStatus.setReusedParts(true);
                 return m_lastParts;
             }
 
@@ -312,6 +314,7 @@ namespace BlackMisc
             }
 
             m_lastParts = parts;
+            m_lastPartsStatus = m_currentPartsStatus;
             return parts;
         }
 
@@ -513,6 +516,7 @@ namespace BlackMisc
         void CPartsStatus::reset()
         {
             m_supportsParts = false;
+            m_resusedParts = false;
         }
 
         // see here for the reason of thess forward instantiations

src/blackmisc/simulation/interpolator.h

@@ -96,11 +96,18 @@ namespace BlackMisc
             //! Set support flag
             void setSupportsParts(bool supports) { m_supportsParts = supports; }
 
+            //! Is a reused parts, means using last value again
+            bool isReusedPArts() const { return m_resusedParts; }
+
+            //! Mark as reused
+            void setReusedParts(bool reused) { m_resusedParts = reused; }
+
             //! Reset to default values
             void reset();
 
         private:
             bool m_supportsParts = false; //!< supports parts for given callsign
+            bool m_resusedParts = false;  //!< reusing from last step
         };
 
         //! Combined results
@@ -248,6 +255,7 @@ namespace BlackMisc
             CInterpolationAndRenderingSetupPerCallsign m_currentSetup;   //!< used setup
             CInterpolationStatus m_currentInterpolationStatus;           //!< this step's status
             CPartsStatus m_currentPartsStatus;                           //!< this step's status
+            CPartsStatus m_lastPartsStatus;                              //!< status for last parts, used when last parts are re-used because of m_partsToSituationInterpolationRatio
             int m_partsToSituationInterpolationRatio = 2;                //!< ratio between parts and situation interpolation, 1..always, 2..every 2nd situation
             Aviation::CAircraftSituation m_lastSituation { Aviation::CAircraftSituation::null() };      //!< latest interpolation
             Aviation::CAircraftParts m_lastParts { Aviation::CAircraftParts::null() };                  //!< latest parts

tests/blackmisc/testinterpolatorlinear.cpp

@@ -54,10 +54,10 @@ namespace BlackMiscTest
 {
     void CTestInterpolatorLinear::basicInterpolatorTests()
     {
-        CCallsign cs("SWIFT");
+        const CCallsign cs("SWIFT");
         CRemoteAircraftProviderDummy provider;
         CInterpolatorLinear interpolator(cs, nullptr, nullptr, &provider);
-        // interpolator.markAsUnitTest();
+        interpolator.markAsUnitTest();
 
         // fixed time so everything can be debugged
         const qint64 ts =  1425000000000; // QDateTime::currentMSecsSinceEpoch();
@@ -115,6 +115,7 @@ namespace BlackMiscTest
         // With one callsign in the lists (of dummy provider) it is somehow expected to be roughly the same performance
 
         interpolator.resetLastInterpolation();
+        interpolator.markAsUnitTest();
         for (int loops = 0; loops < 20; loops++)
         {
             for (qint64 currentTime = startTimeMsSinceEpoch + offset; currentTime < ts + offset; currentTime += (deltaT / 20))