public static void AdjacentSegmentsAt__Throws_Exception_for_Index_Out_of_Range()
{
List <CartesianCoordinate> coordinates = new List <CartesianCoordinate>()
{
new CartesianCoordinate(0, 0),
new CartesianCoordinate(1, 2),
new CartesianCoordinate(3, 4),
new CartesianCoordinate(5, 6),
new CartesianCoordinate(7, 8),
new CartesianCoordinate(9, 10),
new CartesianCoordinate(11, 12)
};
List <LineSegment> segments = new List <LineSegment>()
{
new LineSegment(coordinates[0], coordinates[1]),
new LineSegment(coordinates[1], coordinates[2]),
new LineSegment(coordinates[2], coordinates[3]),
new LineSegment(coordinates[3], coordinates[4]),
new LineSegment(coordinates[4], coordinates[5]),
new LineSegment(coordinates[5], coordinates[6])
};
SegmentsBoundary boundary = new SegmentsBoundary(segments);
Assert.Throws <IndexOutOfRangeException>(() => boundary.AdjacentSegmentsAt(-1));
Assert.Throws <IndexOutOfRangeException>(() => boundary.AdjacentSegmentsAt(7));
}
public static void AdjacentSegmentsAt__Returns_Segments_Sharing_Common_Point_by_Index()
{
List <CartesianCoordinate> coordinates = new List <CartesianCoordinate>()
{
new CartesianCoordinate(0, 0),
new CartesianCoordinate(1, 2),
new CartesianCoordinate(3, 4),
new CartesianCoordinate(5, 6),
new CartesianCoordinate(7, 8),
new CartesianCoordinate(9, 10),
new CartesianCoordinate(11, 12)
};
List <LineSegment> segments = new List <LineSegment>()
{
new LineSegment(coordinates[0], coordinates[1]),
new LineSegment(coordinates[1], coordinates[2]),
new LineSegment(coordinates[2], coordinates[3]),
new LineSegment(coordinates[3], coordinates[4]),
new LineSegment(coordinates[4], coordinates[5]),
new LineSegment(coordinates[5], coordinates[6])
};
SegmentsBoundary boundary = new SegmentsBoundary(segments);
Tuple <IPathSegment, IPathSegment> segmentPair = boundary.AdjacentSegmentsAt(3);
Assert.AreEqual(segments[2], segmentPair.Item1);
Assert.AreEqual(segments[3], segmentPair.Item2);
}