public void NoConstraints_ReturnsCorrectFullLine()
{
Position start = new Position(1, 1);
Position end = new Position(4, 3);
var creator = new BresenhamLineCreator();
IList <Position> result = creator.GetRasterLine(start.x, start.y, end.x, end.y);
result.Should().BeEquivalentTo(new[] { new Position(1, 1), new Position(2, 2), new Position(3, 2), new Position(4, 3) },
options => options.WithStrictOrdering());
}
public void LineWithObstacleAndLimitAndLimitIsAfterObstacle_ReturnsLineTerminatedOnObstacle()
{
Position start = new Position(1, 1);
Position end = new Position(4, 3);
var creator = new BresenhamLineCreator();
Position blocker = new Position(2, 2);
IList <Position> result = creator.GetRasterLine(start.x, start.y, end.x, end.y, 500, position => position != blocker, true);
result.Should().BeEquivalentTo(new[] { new Position(1, 1), new Position(2, 2) },
options => options.WithStrictOrdering());
}
public void LineWithObstacleAndDoesNotAllowFinishOnBlocker_ReturnsLineFinishingBeforeBlocker()
{
Position start = new Position(1, 1);
Position end = new Position(4, 3);
var creator = new BresenhamLineCreator();
Position blocker = new Position(2, 2);
IList <Position> result = creator.GetRasterLine(start.x, start.y, end.x, end.y, position => position != blocker, false);
result.Should().BeEquivalentTo(new[] { new Position(1, 1) },
options => options.WithStrictOrdering());
}
public void LineWithLimitZero_ReturnsEmptyLine()
{
Position start = new Position(1, 1);
Position end = new Position(4, 3);
var creator = new BresenhamLineCreator();
int limit = 0;
IList <Position> result = creator.GetRasterLine(start.x, start.y, end.x, end.y, limit);
result.Should().BeEquivalentTo(new Position[] {},
options => options.WithStrictOrdering());
}
public void LineWithPositiveLimit_ReturnsLineWithProperLength()
{
Position start = new Position(1, 1);
Position end = new Position(4, 3);
var creator = new BresenhamLineCreator();
int limit = 3;
IList <Position> result = creator.GetRasterLine(start.x, start.y, end.x, end.y, limit);
result.Should().BeEquivalentTo(new[] { new Position(1, 1), new Position(2, 2), new Position(3, 2) },
options => options.WithStrictOrdering());
}