def test_glue_tries_to_get_from_other_backends_if_gets_empty_list():
mem = MemoryBackend(9)
csv = CSVBackend()
glue = GlueBackend(mem, csv)
glue.set('key', t, 9)
mem.clear() # say, machine was rebooted, but csv files are still there
assert glue.get('key')[0][1] == 9
def test_glue_failure():
glue = GlueBackend(BinaryBackend())
glue.set('key', t, 1)
with raises(BackendError):
glue.set('key', t, 'I')
def test_glue_backend_dispatch():
mem = MemoryBackend(1)
bin = BinaryBackend()
csv = CSVBackend()
glue = GlueBackend(mem, bin, csv)
glue.set('key', t, 1)
assert glue.get('key')[0][1] == 1
assert glue.get('key') == mem.get('key') == csv.get('key')
glue.clear()
glue.set('key', t, 'value')
assert glue.get('key')[0][1] == 'value'
assert glue.get('key') == mem.get('key') == csv.get('key')
assert bin.get('key') == []