public void ShouldBeAbleToEvaluateIfItIsNeighbourOfAnotherPosition()
{
var positionA = new Position(1, 1);
var positionB = new Position(2, 1);
var positionC = new Position(0, 1);
var positionD = new Position(1, 2);
var positionE = new Position(3, 2);
var positionF = new Position(3, 3);
Assert.AreEqual(false, positionA.IsNeighbourOf(positionA));
Assert.AreEqual(true, positionA.IsNeighbourOf(positionB));
Assert.AreEqual(true, positionB.IsNeighbourOf(positionA));
Assert.AreEqual(true, positionA.IsNeighbourOf(positionC));
Assert.AreEqual(true, positionC.IsNeighbourOf(positionA));
Assert.AreEqual(true, positionA.IsNeighbourOf(positionD));
Assert.AreEqual(true, positionD.IsNeighbourOf(positionA));
Assert.AreEqual(false, positionA.IsNeighbourOf(positionE));
Assert.AreEqual(false, positionE.IsNeighbourOf(positionA));
Assert.AreEqual(false, positionA.IsNeighbourOf(positionF));
Assert.AreEqual(false, positionF.IsNeighbourOf(positionA));
}