public void GetDistance()
{
var pos1 = new Position(0, 0);
var pos2 = new Position(0, 500);
var pos3 = new Position(0, -500);
var pos4 = new Position(500, 500);
var pos5 = new Position(-500, -500);
Assert.Equal(500, pos1.GetDistance(pos2));
Assert.Equal(500, pos1.GetDistance(pos3));
Assert.Equal(707, pos1.GetDistance(pos4));
Assert.Equal(707, pos1.GetDistance(pos5));
Assert.Equal(1414, pos4.GetDistance(pos5));
}