def setUp(self) -> None:
self.dummy_backend = DummyStorageBackend()
self.caching_backend = CachingBackend(self.dummy_backend)
self.identifier = "foo"
self.testdata = "foodata"
self.alternative_testdata = "atadoof"
class CachingBackendTests(unittest.TestCase):
def setUp(self) -> None:
self.dummy_backend = DummyStorageBackend()
self.caching_backend = CachingBackend(self.dummy_backend)
self.identifier = "foo"
self.testdata = "foodata"
self.alternative_testdata = "atadoof"
def test_put_and_get_normal(self) -> None:
# first put the data
self.caching_backend.put(self.identifier, self.testdata)
# then retrieve it again
data = self.caching_backend.get(self.identifier)
self.assertEqual(data, self.testdata)
data = self.caching_backend.get(self.identifier)
self.assertEqual(data, self.testdata)
self.assertEqual(1, self.dummy_backend.times_put_called)
self.assertEqual(0, self.dummy_backend.times_get_called)
def test_put_not_cached_existing_no_overwrite(self) -> None:
self.dummy_backend.stored_items[self.identifier] = self.testdata
with self.assertRaises(FileExistsError):
self.caching_backend.put(self.identifier, self.alternative_testdata)
self.caching_backend.get(self.identifier)
data = self.caching_backend.get(self.identifier)
self.assertEqual(self.testdata, data)
self.assertEqual(1, self.dummy_backend.times_get_called)
def test_put_not_cached_existing_overwrite(self) -> None:
self.dummy_backend.stored_items[self.identifier] = self.testdata
self.caching_backend.put(self.identifier, self.alternative_testdata, overwrite=True)
data = self.caching_backend.get(self.identifier)
self.assertEqual(self.alternative_testdata, data)
self.assertEqual(0, self.dummy_backend.times_get_called)
def test_put_cached_existing_no_overwrite(self) -> None:
self.caching_backend.put(self.identifier, self.testdata)
with self.assertRaises(FileExistsError):
self.caching_backend.put(self.identifier, self.alternative_testdata)
self.caching_backend.get(self.identifier)
data = self.caching_backend.get(self.identifier)
self.assertEqual(self.testdata, data)
self.assertEqual(0, self.dummy_backend.times_get_called)
def test_put_cached_existing_overwrite(self) -> None:
self.caching_backend.put(self.identifier, self.testdata)
self.caching_backend.put(self.identifier, self.alternative_testdata, overwrite=True)
data = self.caching_backend.get(self.identifier)
self.assertEqual(self.alternative_testdata, data)
self.assertEqual(0, self.dummy_backend.times_get_called)
def test_exists_cached(self) -> None:
name = "test_exists_cached"
self.caching_backend.put(name, self.testdata)
self.assertTrue(self.caching_backend.exists(name))
def test_exists_not_cached(self) -> None:
name = "test_exists_not_cached"
self.dummy_backend.put(name, self.testdata)
self.assertTrue(self.caching_backend.exists(name))
def test_exists_not(self) -> None:
self.assertFalse(self.caching_backend.exists("test_exists_not"))
def test_get_not_existing(self) -> None:
name = "test_get_not_existing"
with self.assertRaises(FileNotFoundError):
self.caching_backend.get(name)
