Method tickSpacingUpdateDockMajorTicks

tests/backend/Axis/AxisTest.cpp:911–936

! * checks the spacing of the ticks that is automatically calculated and set * after the switch from "number" to "spacing" ticks type in the dock widget. */

 * after the switch from "number" to "spacing" ticks type in the dock widget.
 */
void AxisTest::tickSpacingUpdateDockMajorTicks() {
	Project project;
	auto* ws = new Worksheet(QStringLiteral("worksheet"));
	QVERIFY(ws != nullptr);
	project.addChild(ws);

	auto* p = new CartesianPlot(QStringLiteral("plot"));
	QVERIFY(p != nullptr);
	p->setType(CartesianPlot::Type::TwoAxes); // Otherwise no axis are created
	ws->addChild(p);

	auto axes = p->children<Axis>();
	auto* xAxis = static_cast<Axis*>(axes.at(0));

	AxisDock dock(nullptr);
	dock.setAxes({xAxis});
	dock.ui.cbMajorTicksType->setCurrentIndex(dock.ui.cbMajorTicksType->findData((int)Axis::TicksType::Spacing));
	dock.ui.cbMinorTicksType->setCurrentIndex(dock.ui.cbMinorTicksType->findData((int)Axis::TicksType::Spacing));

	// initially, the spacing is not set (equal to zero) and after the switch to "spacing"
	// it's adjusted to the current spacing determined by the total number of the ticks:
	// * for major ticks, for the range 0-1 and the initial number of ticks is 6 and it corresponds to spacing = 0.2
	// * for minor ticks, the spacing between the major ticks is 0.2 and the number of minor ticks is 1 which corresponds to spacing = 0.1
	QCOMPARE(xAxis->majorTicksSpacing(), 0.2);
	QCOMPARE(xAxis->minorTicksSpacing(), 0.1);
}

QTEST_MAIN(AxisTest)