public void Simplfy_Items_Null_ThrowsException()
{
IEnumerable <ICoordinate> items = default(IEnumerable <ICoordinate>);
double tolerance = 2;
LangFilter.Simplify(items, tolerance);
}
public void Simplfy_MaximumDistance_Negative_ThrowsException()
{
List <ICoordinate> items = new List <ICoordinate>();
items.Add(new Coordinate(0, 0.008));
double tolerance = -1;
LangFilter.Simplify(items, tolerance);
}
public void Simplify_Valid_Assert()
{
/*
* http://psimpl.sourceforge.net/lang.html
* H
* C
* B D
*
* A G
* F
* E
*
*/
/*
* A and H are retained as they are the start and end.
* Testing the line A->E D is outside the tolerance.
* Testing the line A->D both B and C are within the tolerance, they're removed.
* Testing the line D->H G is outside the tolerance.
* Testing the line D->G F is outside the tolerance.
* Testing the line D->F E is within the tolerance and is removed.
* Testing the line F->H G is within the tolerance and is removed.
*/
var A = new Coordinate(0, 0);
var B = new Coordinate(0.002, 0.002);
var C = new Coordinate(0.003, 0.004);
var D = new Coordinate(0.002, 0.0065);
var E = new Coordinate(-0.002, 0.008);
var F = new Coordinate(-0.001, 0.011);
var G = new Coordinate(0, 0.013);
var H = new Coordinate(0.004, 0.014);
List <ICoordinate> items = new List <ICoordinate>();
items.Add(A);
items.Add(B);
items.Add(C);
items.Add(D);
items.Add(E);
items.Add(F);
items.Add(G);
items.Add(H);
double tolerance = 350;
List <ICoordinate> result = new List <ICoordinate>(LangFilter.Simplify(items, tolerance));
Assert.AreEqual(A, result[0]);
Assert.AreEqual(D, result[1]);
Assert.AreEqual(F, result[2]);
Assert.AreEqual(H, result[3]);
}
