public void GetPoints_AfterFirstGenerating_ReturnsNotZeroPoint()
{
pointsGenerator = new SpiralPointsGenerator(DistanceBetweenPoints, AngleIncrement);
var secondPoint = pointsGenerator.GetPoints().Take(2).Last();
secondPoint.Should().NotBe(new Point());
}
public void GetPoints_OnFirstGenerating_ReturnsZeroPoint()
{
pointsGenerator = new SpiralPointsGenerator(DistanceBetweenPoints, AngleIncrement);
var firstPoint = pointsGenerator.GetPoints().First();
firstPoint.Should().Be(new Point());
}
public void GetPoints_Always_ReturnsNonRepeatingPoints()
{
pointsGenerator = new SpiralPointsGenerator(DistanceBetweenPoints, AngleIncrement);
var pointsToCheck = pointsGenerator.GetPoints().Take(1000).ToArray();
for (var i = 0; i < pointsToCheck.Length; i++)
{
for (var j = i + 1; j < pointsToCheck.Length; j++)
{
pointsToCheck[i].Should().NotBe(pointsToCheck[j]);
}
}
}
public void GetPoints_OnFirstFivePoints_ReturnsConstantPoints()
{
var expectedPoints = new[]
{ new Point(0, 0), new Point(1, 1), new Point(-1, 2), new Point(-3, 0), new Point(-3, -3) };
pointsGenerator = new SpiralPointsGenerator(DistanceBetweenPoints, AngleIncrement);
var actualPoints = pointsGenerator.GetPoints().Take(expectedPoints.Length).ToArray();
for (var i = 0; i < actualPoints.Length; i++)
{
actualPoints[i].Should().Be(expectedPoints[i]);
}
}
public void GetPoints_Always_ReturnsPointsWithEquallyIncreasingAngle()
{
const double maximumAngleDifference = 1.5;
pointsGenerator = new SpiralPointsGenerator(DistanceBetweenPoints, AngleIncrement);
var pointsToCheck = pointsGenerator.GetPoints().Take(4).ToArray();
var previousPoint = pointsToCheck.First();
foreach (var point in pointsToCheck.Skip(1))
{
var currentAngle = GetAngle(point);
var previousAngle = GetAngle(previousPoint);
var angleDifference = currentAngle - previousAngle;
angleDifference.Should().BeLessThan(maximumAngleDifference);
previousPoint = point;
}
}
public void GetPoints_Always_ReturnsPointsWithEquallyIncreasingRadius()
{
const int maximumRadiusDifference = 2;
pointsGenerator = new SpiralPointsGenerator(DistanceBetweenPoints, AngleIncrement);
var pointsToCheck = pointsGenerator.GetPoints().Take(100).ToArray();
var previousPoint = pointsToCheck.First();
foreach (var point in pointsToCheck.Skip(1))
{
var currentRadius = GetRadius(point);
var previousRadius = GetRadius(previousPoint);
var radiusDifference = currentRadius - previousRadius;
radiusDifference.Should().BeLessThan(maximumRadiusDifference);
previousPoint = point;
}
}
