Verify satellite propagation is timezone invariant

tests/parser_tests.cpp

@@ -257,6 +257,17 @@ int main(int argc, char **argv)
         assert(closeTo(satellites[0].x, semiMajorAxis * std::cos(node), 0.1));
         assert(closeTo(satellites[0].y, semiMajorAxis * std::sin(node), 0.1));
         assert(closeTo(satellites[0].z, 0.0, 0.1));
+
+        // A local wall-clock representation must not move the satellites.
+        // 11:48 at UTC+03 and 08:48 UTC represent the same physical instant.
+        const auto localTimeSatellites = RinexNavigation::parseGpsNavigation(
+            syntheticGpsNavigation(gpsLabel, gpsWeek, toe),
+            matchingUtc.toOffsetFromUtc(3 * 60 * 60), &error);
+        assert(error.isEmpty());
+        assert(localTimeSatellites.size() == satellites.size());
+        assert(closeTo(localTimeSatellites[0].x, satellites[0].x, 0.001));
+        assert(closeTo(localTimeSatellites[0].y, satellites[0].y, 0.001));
+        assert(closeTo(localTimeSatellites[0].z, satellites[0].z, 0.001));
     }
 
     const QString rinexPath = qEnvironmentVariable("LOCATION_PLOTTER_TEST_RINEX");