def test_cache_exists(object_exists, traverse, dvc):
remote = BaseRemote(dvc, {})
# remote does not support traverse
remote.CAN_TRAVERSE = False
with mock.patch.object(
remote, "cache_checksums", return_value=list(range(256))
):
checksums = set(range(1000))
remote.cache_exists(checksums)
object_exists.assert_called_with(checksums, None, None)
traverse.assert_not_called()
remote.CAN_TRAVERSE = True
# large remote, small local
object_exists.reset_mock()
traverse.reset_mock()
with mock.patch.object(
remote, "cache_checksums", return_value=list(range(256))
):
checksums = list(range(1000))
remote.cache_exists(checksums)
# verify that _cache_paths_with_max() short circuits
# before returning all 256 remote checksums
max_checksums = math.ceil(
remote._max_estimation_size(checksums)
/ pow(16, remote.TRAVERSE_PREFIX_LEN)
)
assert max_checksums < 256
object_exists.assert_called_with(
frozenset(range(max_checksums, 1000)), None, None
)
traverse.assert_not_called()
# large remote, large local
object_exists.reset_mock()
traverse.reset_mock()
remote.JOBS = 16
with mock.patch.object(
remote, "cache_checksums", return_value=list(range(256))
):
checksums = list(range(1000000))
remote.cache_exists(checksums)
object_exists.assert_not_called()
traverse.assert_called_with(
256 * pow(16, remote.TRAVERSE_PREFIX_LEN),
set(range(256)),
None,
None,
)
def cache_exists(self, *args, **kwargs):
return BaseRemote.cache_exists(self, *args, **kwargs)