def test_action_raise_suppressed_by_setting_for_write(self):
mock_data.make_action_db(
act_on_value=TEST_APP_LABEL,
act_on_attribute=models.ChaosActionDB.attr_default,
enabled=True,
verb=models.verb_raise,
probability=100,
)
self.router.db_for_write(TestModel)
def test_list_with_kv_stderr_empty(self):
key = models.ChaosKV.get_random_key()
mock_data.make_action_db(config={key: "bar"})
mock_data.make_action_response(config={key: "bar"})
self.assertEqual(2, models.ChaosKV.objects.all().count())
for model in models.model_choices:
self._test_output_equals(self.err, "", "--models", model)
self._test_output_not_equals(self.out, "", "--models", model)
call_command("chaos", "list", stdout=self.out, stderr=self.err)
def test_action_slow_is_performed_for_write(self, _sleep):
mock_data.make_action_db(
act_on_value=TEST_APP_LABEL,
act_on_attribute=models.ChaosActionDB.attr_default,
enabled=True,
verb=models.verb_slow,
probability=100,
)
self.router.db_for_write(TestModel)
self.assertEqual(1, _sleep.call_count)
def _test_do_chaos_is_called_for_read(self, attr, _chaos):
model = TestModel
mock_data.make_action_db(
act_on_attribute=attr,
act_on_value=attrgetter(attr)(model),
probability=100,
enabled=True,
)
self.router.db_for_write(model)
self.assertEqual(1, _chaos.call_count)
def _test_action_raise_is_performed_for_write(self, config):
model = TestModel
attr = config["attribute"]
mock_data.make_action_db(
verb=models.verb_raise,
act_on_attribute=attr,
act_on_value=attrgetter(attr)(model),
probability=100,
enabled=True,
)
with self.assertRaises(models.ChaosActionDB.default_exception):
self.router.db_for_write(TestModel)
def test_storm_actions(self):
mock_data.make_action_response()
mock_data.make_action_db()
mock_data.make_action_response(config={STORM_KEY: STORM_VALUE})
mock_data.make_action_db(config={STORM_KEY: STORM_VALUE})
call_command("chaos",
"storm",
"--end",
stdout=self.out,
stderr=self.err)
actions = self.cls.objects.all()
# As we only count one action class, only one object should exist
self.assertEqual(1, len(actions))
def test_dump_db(self, _dump):
key = models.ChaosKV.get_random_key()
action = mock_data.make_action_db(config={key: "bar"})
call_command("chaos",
"dump",
"db",
action.id,
stdout=self.out,
stderr=self.err)
self.assertEqual(1, _dump.call_count)
def storm_start(self, users, groups, probability=None):
"""
Create some wildcard actions with relatively low probability.
The assumption is that every page does 30 db queries on average, and
that we want a failure for every 10th response.
With NV being the number of verbs of the action we want:
- For db router actions: 0.333%
- For middleware actions: 10%
All actions created here get a KV object associated with them to make
it possible to delete them easily.
"""
if users and groups:
raise CommandError("--user and --group can not be used together")
users = User.objects.filter(username__in=users)
groups = Group.objects.filter(name__in=groups)
if not users and not groups:
raise CommandError("Could not find any matching users/groups by given names")
probability = probability or 10 / len(
models.ChaosActionResponse.verb_choices_str
)
for verb in models.ChaosActionResponse.verb_choices_str:
action = mock_data.make_action_response(
verb=verb,
act_on_url_name="",
for_users=users,
for_groups=groups,
probability=probability,
config={STORM_KEY: STORM_VALUE},
)
self.stdout.write("Created response action\t{}".format(action))
probability = probability or 1 / 30 / len(
models.ChaosActionResponse.verb_choices_str
)
for verb in models.ChaosActionDB.verb_choices_str:
action = mock_data.make_action_db(
verb=verb,
act_on_attribute=models.attr_choices_db["attr_app_label"]["attribute"],
act_on_value="",
for_users=users,
for_groups=groups,
probability=probability,
config={STORM_KEY: STORM_VALUE},
)
self.stdout.write("Created dbroute action\t{}".format(action))
def test_list_output_one_of_each_action(self):
mock_data.make_action_db()
mock_data.make_action_response()
self._test_output_equals(self.err, "")
self._test_output_not_equals(self.out, "")
def test_list_by_model_stderr_empty(self):
mock_data.make_action_db()
mock_data.make_action_response()
for model in models.model_choices:
self._test_output_equals(self.err, "", "--models", model)
self._test_output_not_equals(self.out, "", "--models", model)