public void CorrectlyIdentifiesNonCollinearScenarios()
{
var rand = new Random(Seed);
foreach (int xDelta in new[] { -1, 0, 1 })
{
foreach (int yDelta in new[] { -1, 0, 1 })
{
double
startX = rand.NextDouble() * 200.0 - 100.0,
startY = rand.NextDouble() * 200.0 - 100.0;
double
xStep = xDelta * rand.NextDouble() * 50.0 + 10.0,
yStep = yDelta * rand.NextDouble() * 50.0 + 10.0;
Vector
a = new Vector(startX, startY),
b = new Vector(startX + xStep, startY + yStep),
c = new Vector(startX - 2.0 * xStep, startY + 2.0 * yStep);
Assert.That(Helpers.AreCollinear(a, b, c), Is.False, string.Format(
"Expected Helpers.AreCollinear() to report that the points {0}, {1}, {2} are non-collinear, but it reported that they are collinear.",
a,
b,
c));
}
}
}
private TestCase SetupTripleArcTestCase(BreakpointNode leftBP, BreakpointNode rightBP, ArcNode leftArc,
ArcNode middleArc, ArcNode rightArc, ArcNode expectedResult, Vector newSitePos)
{
leftArc.Parent = leftBP;
middleArc.Parent = rightBP;
rightArc.Parent = rightBP;
leftBP.LeftChild = leftArc;
leftBP.RightChild = rightBP;
rightBP.Parent = leftBP;
rightBP.LeftChild = middleArc;
rightBP.RightChild = rightArc;
return new TestCase
{
RootNode = leftBP,
ExpectedResult = expectedResult,
NewSitePosition = newSitePos
};
}