void TestExchangevoices::glissandi()
      {
      QString p1 = DIR + "exchangevoices-gliss.mscx";
      QVERIFY(score);
      Score* score = readScore(p1);
      score->doLayout();

      // select all
      score->startCmd();
      score->cmdSelectAll();
      score->endCmd();

      // do
      score->startCmd();
      score->cmdExchangeVoice(0,1);
      score->endCmd();

      // compare
      QVERIFY(saveCompareScore(score, "exchangevoices-gliss.mscx", DIR + "exchangevoices-gliss-ref.mscx"));
      }