def _test_array_callback(self, arrayname, array_type, length, element_type):
""" Helper function to subscribe to a PV array and check it
receives at least one subscription callback w/ specified type,
length & uniform element type. Checks separately for normal,
TIME & CTRL subscription variants. Returns the array or fails
an assertion."""
results = {}
for form in [ 'normal', 'time', 'ctrl' ]:
chid = ca.create_channel(arrayname,connect=True)
cb, uarg, eventID = ca.create_subscription(chid, use_time=form=='time', use_ctrl=form=='ctrl', callback=onChanges)
CHANGE_DAT.pop(arrayname, None)
timeout=0
# wait up to 6 seconds, if no callback probably due to simulator.py
# not running...
while timeout<120 and not arrayname in CHANGE_DAT:
time.sleep(0.05)
timeout = timeout+1
val = CHANGE_DAT.get(arrayname, None)
ca.clear_subscription(eventID)
self.assertIsNot(val, None)
self.assertEqual(type(val), array_type)
self.assertEqual(len(val), length)
self.assertEqual(type(val[0]), element_type)
self.assertTrue(all( type(e)==element_type for e in val))
results[form] = val
return results
def _test_array_callback(self, arrayname, array_type, length, element_type):
""" Helper function to subscribe to a PV array and check it
receives at least one subscription callback w/ specified type,
length & uniform element type. Checks separately for normal,
TIME & CTRL subscription variants. Returns the array or fails
an assertion."""
results = {}
for form in [ 'normal', 'time', 'ctrl' ]:
chid = ca.create_channel(arrayname,connect=True)
cb, uarg, eventID = ca.create_subscription(chid, use_time=form=='time', use_ctrl=form=='ctrl', callback=onChanges)
CHANGE_DAT.pop(arrayname, None)
timeout=0
# wait up to 6 seconds, if no callback probably due to simulator.py
# not running...
while timeout<120 and not arrayname in CHANGE_DAT:
time.sleep(0.05)
timeout = timeout+1
val = CHANGE_DAT.get(arrayname, None)
ca.clear_subscription(eventID)
self.assertIsNot(val, None)
self.assertEqual(type(val), array_type)
self.assertEqual(len(val), length)
self.assertEqual(type(val[0]), element_type)
self.assertTrue(all( type(e)==element_type for e in val))
results[form] = val
return results
def test_subscription_double(self):
pvn = pvnames.updating_pv1
chid = ca.create_channel(pvn,connect=True)
cb, uarg, eventID = ca.create_subscription(chid, callback=onChanges)
start_time = time.time()
global CHANGE_DAT
while time.time()-start_time < 5.0:
time.sleep(0.01)
if CHANGE_DAT.get(pvn, None) is not None:
break
val = CHANGE_DAT.get(pvn, None)
ca.clear_subscription(eventID)
self.assertIsNot(val, None)
def test_subscription_double(self):
pvn = pvnames.updating_pv1
chid = ca.create_channel(pvn,connect=True)
cb, uarg, eventID = ca.create_subscription(chid, callback=onChanges)
start_time = time.time()
global CHANGE_DAT
while time.time()-start_time < 5.0:
time.sleep(0.01)
if CHANGE_DAT.get(pvn, None) is not None:
break
val = CHANGE_DAT.get(pvn, None)
ca.clear_subscription(eventID)
self.assertNotEqual(val, None)
def test_subscription_custom(self):
pvn = pvnames.updating_pv1
chid = ca.create_channel(pvn, connect=True)
global change_count
change_count = 0
def my_callback(pvname=None, value=None, **kws):
write( ' Custom Callback %s value=%s' %(pvname, str(value)))
global change_count
change_count = change_count + 1
cb, uarg, eventID = ca.create_subscription(chid, callback=my_callback)
start_time = time.time()
while time.time()-start_time < 2.0:
time.sleep(0.01)
ca.clear_subscription(eventID)
time.sleep(0.2)
self.assertTrue(change_count > 2)
def test_subscription_custom(self):
pvn = pvnames.updating_pv1
chid = ca.create_channel(pvn, connect=True)
global change_count
change_count = 0
def my_callback(pvname=None, value=None, **kws):
write( ' Custom Callback %s value=%s' %(pvname, str(value)))
global change_count
change_count = change_count + 1
cb, uarg, eventID = ca.create_subscription(chid, callback=my_callback)
start_time = time.time()
while time.time()-start_time < 2.0:
time.sleep(0.01)
ca.clear_subscription(eventID)
time.sleep(0.2)
self.assertTrue(change_count > 2)