public void StepsTest()
{
Random rnd = new Random(0);
MapCoordinates offset = new MapCoordinates(50, 50);
for (int iTest = 0; iTest < 200; iTest++)
{
MapCoordinates loc1 = new MapCoordinates(rnd.Next(), rnd.Next());
MapCoordinates diff = new MapCoordinates(rnd.Next(100), rnd.Next(100)) - offset;
if (rnd.Next(100) < 10)
{
diff = new MapCoordinates(diff.Column, 0);
}
if (rnd.Next(100) < 10)
{
diff = new MapCoordinates(0, diff.Row);
}
if (diff.Row == 0 && diff.Column == 0)
{
continue;
}
MapCoordinates loc2 = loc1 + diff;
BresenhamStepper stepper = new BresenhamStepper(loc1, loc2);
var steps = stepper.Steps.GetEnumerator();
bool foundLast = false;
steps.MoveNext();
var foundFirst = steps.Current == loc1;
for (int iStep = 0; iStep < 51; iStep++)
{
foundLast = steps.Current == loc2;
if (foundLast)
{
break;
}
steps.MoveNext();
}
Assert.IsTrue(foundFirst);
Assert.IsTrue(foundLast);
}
}
private bool TestBresenhamConstruction(
int columnStart,
int rowStart,
int columnEnd,
int rowEnd,
int?startingColumn = null,
int?startingRow = null,
bool expectException = false)
{
bool threwException = false;
try
{
MapCoordinates start = new MapCoordinates(columnStart, rowStart);
MapCoordinates end = new MapCoordinates(columnEnd, rowEnd);
BresenhamStepper stepper = new BresenhamStepper(start, end, startingColumn, startingRow);
}
catch (Exception)
{
threwException = true;
}
return(!(!expectException && threwException || expectException && !threwException));
}
