def test_circular_dependency_error_is_working_properly(self):
"""testing if CircularDependencyError is working properly
"""
from stalker.exceptions import CircularDependencyError
test_message = 'testing CircularDependencyError'
with pytest.raises(CircularDependencyError) as cm:
raise CircularDependencyError(test_message)
assert str(cm.value) == test_message
def check_circular_dependency(entity, other_entity, attr_name):
"""Checks the circular dependency in entity if it has other_entity in its
dependency attr which is specified with attr_name
"""
for e in walk_hierarchy(entity, attr_name):
if e is other_entity:
raise CircularDependencyError(
'%(entity_name)s (%(entity_class)s) and '
'%(other_entity_name)s (%(other_entity_class)s) creates a '
'circular dependency in their "%(attr_name)s" attribute' % {
'entity_name': entity,
'entity_class': entity.__class__.__name__,
'other_entity_name': other_entity,
'other_entity_class': other_entity.__class__.__name__,
'attr_name': attr_name
})