def test_lookup_by_revision_id_cache(self):
"""Validate ``lookup_by_revision_id`` caching works.
Passing in None in lieu of the actual documents proves that:
* if the payload is in the cache, then no error is thrown since the
cache is hit so no further processing is performed, where otherwise a
method would be called on `None`
* if the payload is not in the cache, then following logic above,
method is called on `None`, raising AttributeError
"""
document_factory = factories.DocumentFactory(1, [1])
documents = document_factory.gen_test({})
# Validate that caching the ref returns expected payload.
rendered_documents = cache.lookup_by_revision_id(1, documents)
self.assertIsInstance(rendered_documents, list)
# Validate that the cache actually works.
next_rendered_documents = cache.lookup_by_revision_id(1, None)
self.assertEqual(rendered_documents, next_rendered_documents)
# No documents passed in and revision ID 2 isn't cached - so expect
# this to blow up.
with testtools.ExpectedException(AttributeError):
cache.lookup_by_revision_id(2, None)
# Invalidate the cache and ensure the original data isn't there.
cache.invalidate()
# The cache won't be hit this time - expect AttributeError.
with testtools.ExpectedException(AttributeError):
cache.lookup_by_revision_id(1, None)
def invalidate_cache_data():
"""Invalidate all data associated with document rendering."""
barbican_cache.invalidate()
engine_cache.invalidate()
def tearDown(self):
# Clear the cache between tests.
cache.invalidate()
super(DeckhandTestCase, self).tearDown()