def test_previous_down_signal(self):
# UP <-----> DN
# 5 8
# +---------+---------+
# -o ->
t = Track("Track1", self.n, up_prefix="A", down_prefix="A", up=0, down=10, joints=[5])
s = Signal()
s.attach(t, 5, Direction.DOWN)
self.assertEqual(t.prev_signal(8, Direction.DOWN), s)
def test_previous_up_signal(self):
# UP <-----> DN
# <- o-
# +---------+---------+
# 3 5
t = Track("Track1", self.n, up_prefix="A", down_prefix="A", up=0, down=10, joints=[5])
s = Signal()
s.attach(t, 5, Direction.UP)
self.assertEqual(t.prev_signal(3, Direction.UP), s)
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_prev_signal_none(self):
t = Track("Track1", self.n, up_prefix="A", down_prefix="A", up=0, down=10, joints=[5])
self.assertEqual(t.prev_signal(8, Direction.UP), None)
self.assertEqual(t.prev_signal(3, Direction.DOWN), None)