Method curvePointMoveUndoRedo

tests/backend/Datapicker/DatapickerTest.cpp:911–972

! * check the correctness of the data point after the point was moved on the scene with undo and redo after this. */

 * check the correctness of the data point after the point was moved on the scene with undo and redo after this.
 */
void DatapickerTest::curvePointMoveUndoRedo() {
	Project project;
	auto* datapicker = new Datapicker(QStringLiteral("Test"));
	project.addChild(datapicker);
	auto* image = datapicker->image();

	// add reference points
	datapicker->addNewPoint(QPointF(0, 1), image);
	datapicker->addNewPoint(QPointF(0, 0), image);
	datapicker->addNewPoint(QPointF(1, 0), image);

	auto ap = image->axisPoints();
	ap.type = DatapickerImage::GraphType::Linear;
	image->setAxisPoints(ap);

	// set logical coordinates for the reference points
	DatapickerImageWidget w(nullptr);
	w.setImages({image});
	w.ui.sbPositionX1->setValue(0);
	w.ui.sbPositionY1->setValue(10);
	w.ui.sbPositionZ1->setValue(0);
	w.ui.sbPositionX2->setValue(0);
	w.ui.sbPositionY2->setValue(0);
	w.ui.sbPositionZ2->setValue(0);
	w.ui.sbPositionX3->setValue(10);
	w.ui.sbPositionY3->setValue(0);
	w.ui.sbPositionZ3->setValue(0);
	w.logicalPositionChanged();

	auto* curve = new DatapickerCurve(i18n("Curve"));
	curve->addDatasheet(image->axisPoints().type);
	datapicker->addChild(curve);

	// add new curve point and check its logical coordinates
	datapicker->addNewPoint(QPointF(0.5, 0.6), curve);
	VALUES_EQUAL(curve->posXColumn()->valueAt(0), 5.);
	VALUES_EQUAL(curve->posYColumn()->valueAt(0), 6.);

	// move the last added point to a new position and check its logical coordinates again
	auto points = curve->children<DatapickerPoint>(AbstractAspect::ChildIndexFlag::IncludeHidden);
	QCOMPARE(points.count(), 1);
	points[0]->setPosition(QPointF(0.2, 0.9)); // Changing the position of the point
	VALUES_EQUAL(curve->posXColumn()->valueAt(0), 2.);
	VALUES_EQUAL(curve->posYColumn()->valueAt(0), 9.);

	// undo the move step and check the position again
	auto* undoStack = project.undoStack();
	undoStack->undo();
	points = curve->children<DatapickerPoint>(AbstractAspect::ChildIndexFlag::IncludeHidden);
	QCOMPARE(points.count(), 1);
	QCOMPARE(points[0]->position(), QPointF(0.5, 0.6));
	VALUES_EQUAL(curve->posXColumn()->valueAt(0), 5.);
	VALUES_EQUAL(curve->posYColumn()->valueAt(0), 6.);

	// redo the last step and check the position again
	undoStack->redo();
	points = curve->children<DatapickerPoint>(AbstractAspect::ChildIndexFlag::IncludeHidden);
	QCOMPARE(points.count(), 1);