wait for data changed in test

autotests/mediaplaylistproxymodeltest.cpp

@@ -1537,6 +1537,7 @@ void MediaPlayListProxyModelTest::testRestoreSettings()
     QSignalSpy randomPlayChangedSpy(&myPlayList, &MediaPlayListProxyModel::randomPlayChanged);
     QSignalSpy repeatPlayChangedSpy(&myPlayList, &MediaPlayListProxyModel::repeatPlayChanged);
     QSignalSpy playListFinishedSpy(&myPlayList, &MediaPlayListProxyModel::playListFinished);
+    QSignalSpy dataChangedSpy(&myPlayList, &MediaPlayListProxyModel::dataChanged);
 
     myDatabaseContent.init(QStringLiteral("testDbDirectContent"));
 
@@ -1573,6 +1574,8 @@ void MediaPlayListProxyModelTest::testRestoreSettings()
                         QStringLiteral("track1"), {}},
                        ElisaUtils::Track);
 
+    QVERIFY(dataChangedSpy.wait());
+
     QCOMPARE(currentTrackChangedSpy.count(), 1);
     QCOMPARE(randomPlayChangedSpy.count(), 0);
     QCOMPARE(repeatPlayChangedSpy.count(), 0);