| import time | |
| import epics | |
| import sys | |
| import pvnames | |
| pvname = pvnames.updating_pv1 # motor1 | |
| write = sys.stdout.write | |
| def wait(timeout=10): | |
| t0 = time.time() | |
| while time.time() - t0 < timeout: | |
| time.sleep(1.e-4) | |
| change_count = 0 | |
| def onChanges(pvname=None, value=None, char_value=None, **kw): | |
| global change_count | |
| change_count += 1 | |
| try: | |
| write( 'PV %s %s, %s Changed!\n' % (pvname, repr(value), char_value)) | |
| except: | |
| pass | |
| def test_pv_callback(): | |
| mypv = epics.get_pv(pvname) | |
| global change_count | |
| mypv.get_ctrlvars() | |
| mypv.add_callback(onChanges) | |
| wait(5) | |
| assert change_count > 5 | |