def test_default_empty_entry_point_group(cleanup):
Lookup._DEFAULT_ENTRY_POINT_GROUP = 'lookups.test_default_empty_entry_point_group'
dflt = Lookup.get_default()
assert dflt
assert isinstance(dflt, ProxyLookup)
all_instances = dflt.lookup_all(object)
assert not all_instances
assert Lookup.get_default() is dflt
assert Lookup._DEFAULT_LOOKUP is dflt
assert Lookup._DEFAULT_LOOKUP_PROVIDER is None
def test_default_lookup_provider(cleanup):
Lookup._DEFAULT_ENTRY_POINT_GROUP = 'lookups.test_default_lookup_provider'
dflt = Lookup.get_default()
assert dflt
assert isinstance(dflt, DelegatedLookup)
all_instances = dflt.lookup_all(object)
assert len(all_instances) == 1
assert isinstance(all_instances[0], TestParentObject)
assert Lookup.get_default() is dflt
assert Lookup._DEFAULT_LOOKUP is dflt
assert Lookup._DEFAULT_LOOKUP_PROVIDER is None
def test_default_no_lookup(cleanup):
Lookup._DEFAULT_ENTRY_POINT_GROUP = 'lookups.test_default_no_lookup'
dflt = Lookup.get_default()
assert dflt
assert isinstance(dflt, ProxyLookup)
all_instances = dflt.lookup_all(object)
assert all_instances
assert (len(all_instances) %
3) == 0 # Because pytest can double up our entry points
assert {type(instance)
for instance in all_instances
} == set([TestParentObject, TestChildObject, TestOtherObject])
assert Lookup.get_default() is dflt
assert Lookup._DEFAULT_LOOKUP is dflt
assert Lookup._DEFAULT_LOOKUP_PROVIDER is None
def test_default_lookup_lookup_provider(cleanup):
Lookup._DEFAULT_ENTRY_POINT_GROUP = 'lookups.test_default_lookup_lookup_provider'
dflt = Lookup.get_default()
assert dflt
assert isinstance(dflt, SingletonLookup)
all_instances = dflt.lookup_all(object)
assert len(all_instances) == 1
assert isinstance(all_instances[0], TestParentObject)
assert Lookup.get_default() is dflt
assert isinstance(Lookup._DEFAULT_LOOKUP, DefaultLookupLookupProvider)
assert Lookup._DEFAULT_LOOKUP_PROVIDER is Lookup._DEFAULT_LOOKUP
# Try have the provider return None
Lookup._DEFAULT_LOOKUP_PROVIDER._lookup = None
new_dflt = Lookup.get_default()
assert new_dflt is Lookup._DEFAULT_LOOKUP
all_instances = new_dflt.lookup_all(object)
assert len(all_instances) == 1
assert isinstance(all_instances[0], TestOtherObject)