From c80d12c3575c78ff984d4b79081057f95b9bff04 Mon Sep 17 00:00:00 2001
From: Klaus Basan <klaus.basan@klausbasan.de>
Date: Sun, 21 Jan 2018 19:42:52 +0100
Subject: [PATCH] Unit test

---
 tests/blackmisc/testaviation.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/blackmisc/testaviation.cpp b/tests/blackmisc/testaviation.cpp
index ba88495cc..18b7f647d 100644
--- a/tests/blackmisc/testaviation.cpp
+++ b/tests/blackmisc/testaviation.cpp
@@ -214,6 +214,10 @@ namespace BlackMiscTest
         CPressure seaLevelPressure2(29.56, CPressureUnit::inHg());
         CAltitude pressureAltitude2 = altitude2.toPressureAltitude(seaLevelPressure2);
         QCOMPARE(qRound(pressureAltitude2.value(CLengthUnit::m())), 612);
+
+        CLength offset(10, CLengthUnit::m());
+        altitude2 += offset;
+        QCOMPARE(qRound(altitude2.value(CLengthUnit::m())), 510);
     }
 
 } // namespace