def test_prev_signal_after_switch(self):
# UP <-----> DN
# 0 3 5 10
# +----+-----+-------------+
# -o \ 8
# '-+---------+
# 6 -> 10
t1 = Track("Track1", self.n, up_prefix="A", down_prefix="A", up=0, down=10, joints=[3])
t2 = Track("Track2", self.n, up_prefix="B", down_prefix="B", up=6, down=10)
i = Interlocking("Test", self.n)
l = Lever(1, i)
sw = Switch(lever=l, label="A")
sw.attach(t1, 5, Direction.DOWN)
sw.attach_turnout(t2, Direction.UP)
s = Signal()
s.attach(t1, 3, Direction.DOWN)
self.assertEqual(t2.prev_signal(8, Direction.DOWN), s)
def test_fork_route(self):
# UP <-----> DN
#
# 2 7 10 16 18
# --+----------+-----+------------+---- t1
# -o 2 -o 4 \ 5 -o 6
# '----------+---- t2
# -o 8
n = TrackNetwork("Test")
i = Interlocking("Test", n)
l2, l4, l5, l6, l8 = [Lever(j, i) for j in [2, 4, 5, 6, 8]]
t1 = Track("Track1", n, up_prefix="B", down_prefix="B", up=0, down=18, joints=[2, 7, 16])
t2 = Track("Track2", n, up_prefix="B", down_prefix="B", up=12, down=18)
sw = Switch(lever=l5, label="A")
sw.attach(t1, 10, Direction.DOWN)
sw.attach_turnout(t2, Direction.UP)
s2 = Signal(lever=l2, control_length = ControlLength([
(l5.normal, [SWO(t1, 3), SWO(t1, 8)]),
(l5.reverse, [SWO(t1, 3), SWO(t1, 8), SWO(t2, 15)])
]))
s4 = Signal(lever=l4, control_length = ControlLength([
(l5.normal, [SWO(t1, 8)]),
(l5.reverse, [SWO(t1, 8), SWO(t2, 15)])
]))
s6 = Signal(lever=l6)
s8 = Signal(lever=l8)
s2.attach(t1, 2, Direction.DOWN)
s4.attach(t1, 7, Direction.DOWN)
s6.attach(t1, 16, Direction.DOWN)
s8.attach(t2, 16, Direction.DOWN)
routes = i.routes_from(l2)
self.assertIn(([l2], s4), routes)
self.assertIn(([l2, l4], s6), routes)
self.assertIn(([l2, l4, l5], s8), routes)
self.assertEquals(len(routes), 3)