async def test_init_failure(circuit):
"""Test failed init."""
logger = TimeLogger('logger', mstop=True)
out = edzed.ValuePoll(
'out',
func=lambda: edzed.UNDEF, # func never delivers
interval=10, # don't care
init_timeout=0.04) # no initdef
with pytest.raises(Exception, match="not initialized"):
await circuit.run_forever()
logger.compare([(40, '--stop--')])
async def test_init_timeout(circuit):
"""Test the initialization time_out."""
logger = TimeLogger('logger')
out = edzed.ValuePoll(
'out',
func=lambda: edzed.UNDEF, # it never delivers
interval=10, # don't care
init_timeout=0.12,
on_output=edzed.Event(logger),
initdef='DEFAULT')
asyncio.create_task(circuit.run_forever())
await circuit.wait_init()
await circuit.shutdown()
logger.compare([(120, 'DEFAULT')])
async def test_async(circuit):
"""Test the basic value polling."""
q = asyncio.Queue()
for v in "AEI":
q.put_nowait(v)
logger = TimeLogger('logger')
out = edzed.ValuePoll('out',
func=q.get,
interval='0m0.05s',
on_output=edzed.Event(logger))
timelimit(0.2, error=False)
try:
await circuit.run_forever()
except asyncio.CancelledError:
pass
LOG = [(0, 'A'), (50, 'E'), (100, 'I')] # no more data in queue
logger.compare(LOG)
async def test_async_init_timeout_failure(circuit):
"""Test the async initialization time_out."""
async def w3():
await asyncio.sleep(0.1)
return 3
logger = TimeLogger('logger')
out = edzed.ValuePoll(
'out',
func=w3,
interval=10, # don't care
init_timeout=0.05,
on_output=edzed.Event(logger),
initdef='DEFAULT')
asyncio.create_task(circuit.run_forever())
await circuit.wait_init()
await circuit.shutdown()
logger.compare([(50, 'DEFAULT')])
async def test_undef(circuit):
"""UNDEF menas data not available."""
n = 0
def acq():
nonlocal n
n += 1
return n if n not in (1, 3, 6) else edzed.UNDEF
logger = TimeLogger('logger')
out = edzed.ValuePoll('out',
func=acq,
interval=0.03,
on_output=edzed.Event(logger))
timelimit(0.23, error=False)
# --- time 0.000:
# Timelogger starts
# ValuePoll polls for the first time, receives UNDEF, remains uninitialized
# --- time 0.030:
# ValuePoll polls for the second time, receives 2, is now initialized (init_async)
# timelimit timer starts counting its 0.230
# --- time 0.260:
# timelimit stops the circuit
try:
await circuit.run_forever()
except asyncio.CancelledError:
pass
LOG = [
# (0, 1) missing, initialization not finished
(30, 2),
# (60, 3), missing
(90, 4),
(120, 5),
# (150, 6), also missing
(180, 7),
(210, 8),
(240, 9)
]
logger.compare(LOG)
async def test_poll(circuit):
"""Test the basic value polling."""
n = 0
def acq():
nonlocal n
n += 1
return n
logger = TimeLogger('logger')
out = edzed.ValuePoll('out',
func=acq,
interval='0m0.05s',
on_output=edzed.Event(logger))
timelimit(0.34, error=False)
try:
await circuit.run_forever()
except asyncio.CancelledError:
pass
LOG = [(0, 1), (50, 2), (100, 3), (150, 4), (200, 5), (250, 6), (300, 7)]
logger.compare(LOG)
import asyncio
import random
import edzed
def get_temperature():
"""Fake room thermometer (Celsius scale)."""
t = random.uniform(20.0, 28.0)
print(f" T={t:.1f}")
return t
edzed.ValuePoll('thermometer', func=get_temperature, interval=1)
edzed.Compare('thermostat',
low=22.0,
high=24.0,
on_output=edzed.Event('heater')).connect('thermometer')
edzed.OutputFunc('heater',
func=lambda hot: print(f"Heater {'off' if hot else 'on'}"),
on_error=None)
if __name__ == '__main__':
print('Press ctrl-C to stop')
circuit = edzed.get_circuit()
asyncio.run(circuit.run_forever())