cpp-qt5-client: add valgrind memory test (#3663)

samples/client/petstore/cpp-qt5/build-and-test.bash

@@ -2,10 +2,41 @@
 
 set -e
 
-mkdir build
+mkdir -p build
 cd build
 
-qmake ../PetStore/PetStore.pro
+qmake ../PetStore/PetStore.pro CONFIG+=debug
+
 make
 
-./PetStore
+valgrind --leak-check=full ./PetStore |& tee result.log || exit 1
+
+echo "Make sure the tests are launched:"
+testCount=$(cat result.log | grep 'Finished testing of' | wc -l)
+if [ $testCount == 3 ]
+then
+  echo "Ok"
+else
+  echo "The tests were not run!!!"
+  exit 1
+fi
+
+echo "Make sure the tests passed:"
+successCount=$(cat result.log | grep '0 failed' | wc -l)
+if [ $successCount == 3 ]
+then
+  echo "Ok"
+else
+  echo "The tests failed!!!"
+  exit 1
+fi
+
+echo "Check if no memory leaks occured:"
+leakCount=$(cat result.log | grep 'lost: 0 bytes in 0 blocks' | wc -l)
+if [ $leakCount == 3 ]
+then
+  echo "Ok"
+else
+  echo "There was memory leaks!!!"
+  exit 1
+fi