public Line(RailwayStation fromObj, RailwayStation toObj, string name, float distance)
{
Name = name;
From = fromObj;
To = toObj;
_segmentFrom = new Segment(From, To, distance);
}
public void Insert(RailwayStation fromObject, TrackObject newObject, float distanceFrom)
{
if (fromObject == From) {
_segmentFrom.Insert(From, newObject, distanceFrom);
return;
}
if (fromObject != To) {
throw new VrException("Railway station isn't part of this Line.");
}
Segment segment = FindSegmentEndsWith(To);
if (segment == null) {
throw new VrException("Railway station isn't part of this Line.");
}
segment.Insert(To, newObject, distanceFrom);
}
public void AppendBeforeTest()
{
TrackObject beginStation = new RailwayStation("Begin");
TrackObject endStation = new RailwayStation("End");
TrackObject newBegin = new RailwayStation("NewBegin");
Segment source = new Segment(beginStation, endStation, 10);
Segment appended = source.Insert(endStation, newBegin, 25);
Assert.AreEqual(appended.From, newBegin);
Assert.AreEqual(appended.To, beginStation);
Assert.AreEqual(appended.Distance, 15);
Assert.AreEqual(appended.Next, source);
Assert.AreEqual(appended.Prev, null);
Assert.AreEqual(source.Prev, appended);
Assert.AreEqual(source.Next, null);
}
public void InsertSimpleFromLastTest()
{
TrackObject beginStation = new RailwayStation("Begin");
TrackObject endStation = new RailwayStation("End");
TrackObject middleStation = new RailwayStation("Middle");
Segment originSegment = new Segment(beginStation, endStation, 20);
Segment inserted = originSegment.Insert(endStation, middleStation, 5);
Assert.AreEqual(inserted.From, middleStation);
Assert.AreEqual(inserted.To, endStation);
Assert.AreEqual(inserted.Distance, 5);
Assert.AreEqual(originSegment.From, beginStation);
Assert.AreEqual(originSegment.To, middleStation);
Assert.AreEqual(originSegment.Distance, 15);
Assert.AreEqual(inserted.Prev, originSegment);
Assert.AreEqual(inserted.Next, null);
Assert.AreEqual(originSegment.Prev, null);
Assert.AreEqual(originSegment.Next, inserted);
}
public void InsertFromLastTest()
{
TrackObject st12 = new RailwayStation("St_1_2");
Segment inserted = _seg2.Insert(_st3, st12, 35);
Assert.AreEqual(_seg1.From, _st1);
Assert.AreEqual(_seg1.To, st12);
Assert.AreEqual(_seg1.Distance, 5);
Assert.AreEqual(inserted.From, st12);
Assert.AreEqual(inserted.To, _st2);
Assert.AreEqual(inserted.Distance, 10);
Assert.AreEqual(_seg2.From, _st2);
Assert.AreEqual(_seg2.To, _st3);
Assert.AreEqual(_seg2.Distance, 25);
Assert.AreEqual(_seg1.Prev, null);
Assert.AreEqual(_seg1.Next, inserted);
Assert.AreEqual(inserted.Prev, _seg1);
Assert.AreEqual(inserted.Next, _seg2);
Assert.AreEqual(_seg2.Prev, inserted);
Assert.AreEqual(_seg2.Next, null);
}
