def test_add_event_conflict(self, resources: ResourceCollection):
"""
Tests that a resource adding is cancelled if an event listener raises ResourceConflict.
"""
def listener(event):
raise ResourceConflict('conflict test', event.resource)
resources.add_listener(ResourceEventType.added, listener)
pytest.raises(ResourceConflict, resources.add, 5)
with pytest.raises(ResourceNotFoundError):
yield from resources.request(int, timeout=0)
def test_add_name_conflict(self, resources: ResourceCollection):
"""Tests that add() won't let replace existing resources."""
resource = resources.add(5, 'foo')
exc = pytest.raises(ResourceConflict, resources.add, 4, 'foo')
assert exc.value.resource is resource
assert str(exc.value) == ('"foo" conflicts with Resource(types=(\'int\',), alias=\'foo\', '
'value=5, context_var=None)')
def test_add(self, resources: ResourceCollection, event_loop, delay):
"""Tests that a resource is properly added to the collection and listeners are notified."""
events = []
resources.add_listener(ResourceEventType.added, events.append)
if delay:
call = partial(resources.add, 6, 'foo', 'foo.bar', extra_types=float)
event_loop.call_soon(call)
else:
resources.add(6, 'foo', 'foo.bar', extra_types=float)
value = yield from resources.request(int, 'foo', timeout=2)
assert value == 6
assert len(events) == 1
resource = events[0].resource
assert resource.alias == 'foo'
assert resource.context_var == 'foo.bar'
assert resource.value == 6
assert resource.types == ('int', 'float')
def test_remove(self, resources: ResourceCollection):
"""Tests that resources can be removed and that the listeners are notified."""
resource = resources.add(4)
events = []
resources.add_listener(ResourceEventType.removed, events.append)
resources.remove(resource)
assert len(events) == 1
assert events[0].resource.value == 4
with pytest.raises(ResourceNotFoundError):
yield from resources.request(int, timeout=0)
def test_bad_request(self, resources: ResourceCollection, bad_arg, errormsg):
type_ = None if bad_arg == 'type' else 'foo'
alias = None if bad_arg == 'alias' else 'foo'
with pytest.raises(ValueError) as exc:
yield from resources.request(type_, alias)
assert str(exc.value) == errormsg
def test_request_timeout(self, resources: ResourceCollection):
with pytest.raises(ResourceNotFoundError) as exc:
yield from resources.request(int, timeout=0.2)
assert str(exc.value) == "no matching resource was found for type='int' alias='default'"
