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import time
import pytest
import subprocess
from tempfile import NamedTemporaryFile as NTF
import epics
cas_test_db = '''
record(ao, "test:ao") {
field(ASG, "rps_threshold")
field(DRVH, "10")
field(DRVL, "0")
}
record(bo, "test:bo") {
field(ASG, "rps_lock")
field(ZNAM, "OUT")
field(ONAM, "IN")
}
record(ao, "test:ao2") {
field(DRVH, "5")
field(DRVL, "1")
}
record(bo, "test:permit") {
field(VAL, "0")
field(PINI, "1")
field(ZNAM, "DISABLED")
field(ONAM, "ENABLED")
}
'''
cas_rules = '''
ASG(DEFAULT) {
RULE(1,READ)
RULE(1,WRITE,TRAPWRITE)
}
ASG(rps_threshold) {
INPA("$(P):permit")
RULE(1, READ)
RULE(0, WRITE, TRAPWRITE) {
CALC("A=1")
}
RULE(1, WRITE, TRAPWRITE) {
CALC("A=0")
}
}
ASG(rps_lock) {
INPA("$(P):permit")
RULE(1, READ)
RULE(1, WRITE, TRAPWRITE) {
CALC("A=0")
}
}
'''
# use yield_fixture() for compatibility with pytest < 2.10
@pytest.yield_fixture(scope='module')
def softioc():
with NTF(mode='w+') as cf, NTF(mode='w+') as df:
cf.write(cas_rules)
cf.flush()
df.write(cas_test_db)
df.flush()
proc = subprocess.Popen(['softIoc', '-D',
'/home/travis/mc/envs/testenv/epics/dbd/softIoc.dbd',
'-m', 'P=test', '-a', cf.name,
'-d', df.name],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE)
yield proc
try:
proc.kill()
proc.wait()
except OSError:
pass
@pytest.yield_fixture(scope='module')
def pvs():
pvlist = ['test:ao', 'test:ao.DRVH', 'test:bo', 'test:ao2',
'test:permit']
pvs = dict()
for name in pvlist:
pv = epics.get_pv(name)
pv.wait_for_connection()
pvs[pv.pvname] = pv
yield pvs
for pv in pvs.values():
pv.disconnect()
def test_connected(softioc, pvs):
for pv in pvs.values():
assert pv.connected
def test_permit_disabled(softioc, pvs):
# with the permit disabled, all test pvs should be readable/writable
for pv in pvs.values():
assert pv.read_access and pv.write_access
def test_permit_enabled(softioc, pvs):
# set the run-permit
pvs['test:permit'].put(1, wait=True)
assert pvs['test:permit'].get(as_string=True, use_monitor=False) == 'ENABLED'
# rps_lock rule should disable write access
assert pvs['test:bo'].write_access is False
with pytest.raises(epics.ca.CASeverityException):
pvs['test:bo'].put(1, wait=True)
# rps_threshold rule should disable write access to metadata, not VAL
assert pvs['test:ao'].write_access is True
assert pvs['test:ao.DRVH'].write_access is False
with pytest.raises(epics.ca.CASeverityException):
pvs['test:ao.DRVH'].put(100, wait=True)
def test_pv_access_event_callback(softioc, pvs):
# clear the run-permit
pvs['test:permit'].put(0, wait=True)
assert pvs['test:permit'].get(as_string=True, use_monitor=False) == 'DISABLED'
def lcb(read_access, write_access, pv=None):
assert pv.read_access == read_access
assert pv.write_access == write_access
pv.flag = True
bo = epics.get_pv('test:bo', access_callback=lcb)
bo.flag = False
# set the run-permit to trigger an access rights event
pvs['test:permit'].put(1, wait=True)
assert pvs['test:permit'].get(as_string=True, use_monitor=False) == 'ENABLED'
assert bo.flag is True
bo.access_callbacks = []
def test_ca_access_event_callback(softioc, pvs):
# clear the run-permit
pvs['test:permit'].put(0, wait=True)
assert pvs['test:permit'].get(as_string=True, use_monitor=False) == 'DISABLED'
bo_id = epics.ca.create_channel('test:bo')
assert bo_id is not None
def lcb(read_access, write_access):
assert read_access and write_access
lcb.sentinal = True
lcb.sentinal = False
epics.ca.replace_access_rights_event(bo_id, callback=lcb)
assert lcb.sentinal is True
epics.ca.clear_channel(bo_id)
def test_connection_callback(softioc, pvs):
results = []
def callback(conn, **kwargs):
results.append(conn)
pv = epics.PV('test:ao', connection_callback=callback)
pv.wait_for_connection()
softioc.kill()
softioc.wait()
t0 = time.time()
while pv.connected and (time.time() - t0) < 5:
time.sleep(0.1)
assert True in results
assert False in results
|
