public void ShouldBeValidForParallelLines()
{
var machine = new PinballMachine();
var line1 = new Line(100, 100, 100, 200);
var line2 = new Line(105, 100, 105, 200);
machine.Add(line1);
machine.Add(line2);
Assert.IsTrue(machine.IsValid());
}
public void ShouldBeInvalidForCrossingLines()
{
var machine = new PinballMachine();
var line1 = new Line(100, 100, 100, 200);
var line2 = new Line(50, 150, 150, 150);
machine.Add(line1);
machine.Add(line2);
Assert.IsFalse(machine.IsValid());
}