def test_mimo(self):
"""Parallel should support branches with States inputs"""
inp = States(State(x=1), State(x=2))
wrk = ParallelBranches(Identity(), Identity(), Identity())
out = wrk.run(inp).result()
self.assertEqual(len(out), 3)
self.assertIsInstance(out, States)
self.assertEqual(out.first, inp)
def test_look_and_feel(self):
br = Runnable(), Runnable()
pb = ParallelBranches(*br)
self.assertEqual(pb.name, 'ParallelBranches')
self.assertEqual(str(pb), '(Runnable) & (Runnable)')
self.assertEqual(repr(pb), 'ParallelBranches(Runnable(), Runnable())')
self.assertEqual(tuple(pb), br)
def test_parallel_independent_execution(self):
class Component(Runnable):
def __init__(self, runtime):
super(Component, self).__init__()
self.runtime = runtime
def next(self, state):
time.sleep(self.runtime)
return state
# make sure all branches really run in parallel
pb = ParallelBranches(
Component(1), Component(1), Component(1), Component(1), Component(1))
with tictoc() as tt:
pb.run(State()).result()
# total runtime has to be smaller that the sum of individual runtimes
self.assertTrue(1 <= tt.dt <= 2)
def test_basic(self):
class Fast(Runnable):
def next(self, state):
time.sleep(0.1)
return state.updated(x=state.x + 1)
class Slow(Runnable):
def next(self, state):
time.sleep(0.2)
return state.updated(x=state.x + 2)
# "endomorphic case"
pb = ParallelBranches(Identity(), Slow(), Fast(), Slow())
res = pb.run(State(x=0)).result()
self.assertEqual([s.x for s in res], [0, 2, 1, 2])
# default case
pb = ParallelBranches(Slow(), Fast(), Slow())
res = pb.run(State(x=0)).result()
self.assertEqual([s.x for s in res], [2, 1, 2])
def test_basic(self):
class Fast(Runnable):
def next(self, state):
time.sleep(0.1)
return state.updated(x=state.x + 1)
class Slow(Runnable):
def next(self, state):
time.sleep(0.2)
return state.updated(x=state.x + 2)
# standard case (endomorphic; first output state is the input state)
pb = ParallelBranches(Slow(), Fast(), Slow())
res = pb.run(State(x=0)).result()
self.assertEqual([s.x for s in res], [0, 2, 1, 2])
# branches' outputs are of a different type that the inputs
# (i.e. non-endomorphic branches)
pb = ParallelBranches(Slow(), Fast(), Slow(), endomorphic=False)
res = pb.run(State(x=0)).result()
self.assertEqual([s.x for s in res], [2, 1, 2])