Method changePathBoundsTest

test/path_object_t.cpp:493–647

}

void PathObjectTest::changePathBoundsTest()
{
	QFETCH(int, part_index);
	QFETCH(float, start_len);
	QFETCH(float, end_len);
	QFETCH(int, expected_size_fwd);
	QFETCH(int, expected_size_rev);
	
	// For 0.0 or 1.0, products are not precise enough.
	auto exact_length = [](float factor, float length) -> float {
		if (factor == 0.0f)
			return 0.0f;
		if (factor == 1.0f)
			return length;
		return factor * length;
	};
	
	// This path is 4+3+4+4+5 = 20 units long.
	PathObject proto{Map::getCoveringRedLine()};
	proto.addCoordinate({0.0, 4.0});
	proto.addCoordinate({0.0, 8.0});
	proto.addCoordinate({3.0, 8.0});
	proto.addCoordinate({3.0, 4.0});
	proto.addCoordinate({3.0, 0.0});
	proto.addCoordinate({0.0, 4.0, MapCoord::HolePoint});
	proto.updatePathCoords();
	auto orig_len = proto.parts().front().length();
	QCOMPARE(orig_len, 20.0f);
	
	// open path
	if (start_len < end_len)
	{
		PathObject path{Map::getCoveringRedLine()};
		path.copyFrom(proto);
		path.changePathBounds(std::size_t(part_index), exact_length(start_len, orig_len), exact_length(end_len, orig_len));
		path.updatePathCoords();
		
		QVERIFY(!path.parts().front().isClosed());
		QCOMPARE(int(path.getCoordinateCount()), expected_size_fwd);
		if (end_len == start_len)
			QCOMPARE(path.parts().front().length(), exact_length(1.0, orig_len));
		else
			QCOMPARE(path.parts().front().length(), exact_length(end_len - start_len, orig_len));
		
		// First and last new coord may differ, but the sequence in between must match.
		if (expected_size_fwd > 2)
		{
			auto first = begin(path.getRawCoordinateVector()) + 1;
			auto last = end(path.getRawCoordinateVector()) - 1;
			auto seq = std::find_end(
			               begin(proto.getRawCoordinateVector()), end(proto.getRawCoordinateVector()),
			               first, last );
			QVERIFY(seq != end(proto.getRawCoordinateVector()));
		}
	}
	
	// closed path
	proto.getCoordinateRef(5).setClosePoint(true);