/// <summary>
/// Verifies that the edge's label is near the edge.
/// </summary>
private static void VerifyLabelIsNearEdges(Edge edge)
{
Label label = edge.Label;
if (label != null)
{
Rectangle labelBox = label.BoundingBox;
Point[] edgePoints = edge.GetPoints();
Point[] labelPoints = new[] { labelBox.Center, labelBox.LeftTop, labelBox.LeftBottom, labelBox.RightBottom, labelBox.RightTop };
if (!edgePoints.Any(p => labelBox.Contains(p)))
{
// If the edge doesn't intersect the label, check that the label is at least nearby.
// 10 was chosen as the distance tolerance since it is fairly small and passes on pretty much every diagram I tested.
double closestDistance = GetClosestDistance(edgePoints, labelPoints);
Assert.IsTrue(closestDistance < 10, "The label was placed greater than 10 units from the edge.");
}
}
}