async def test_get_block_data_with_blinking_replica(self, bft_network):
"""
Test that the cluster continues working when one blinking replica
By a blinking replic we mean a replica that goes up and down for random
period of time
"""
with blinking_replica.BlinkingReplica() as blinking:
br = random.choice(
bft_network.all_replicas(without={0}))
bft_network.start_replicas(replicas=bft_network.all_replicas(without={br}))
skvbc = kvbc.SimpleKVBCProtocol(bft_network)
client = bft_network.random_client()
blinking.start_blinking(bft_network.start_replica_cmd(br))
for _ in range(300):
last_block = skvbc.parse_reply(
await client.read(skvbc.get_last_block_req()))
# Perform an unconditional KV put.
# Ensure keys aren't identical
kv = [(skvbc.keys[0], skvbc.random_value()),
(skvbc.keys[1], skvbc.random_value())]
reply = await client.write(skvbc.write_req([], kv, 0))
reply = skvbc.parse_reply(reply)
self.assertTrue(reply.success)
self.assertEqual(last_block + 1, reply.last_block_id)
last_block = reply.last_block_id
# Get the kvpairs in the last written block
data = await client.read(skvbc.get_block_data_req(last_block))
kv2 = skvbc.parse_reply(data)
self.assertDictEqual(kv2, dict(kv))
# Write another block with the same keys but (probabilistically)
# different data
kv3 = [(skvbc.keys[0], skvbc.random_value()),
(skvbc.keys[1], skvbc.random_value())]
reply = await client.write(skvbc.write_req([], kv3, 0))
reply = skvbc.parse_reply(reply)
self.assertTrue(reply.success)
self.assertEqual(last_block + 1, reply.last_block_id)
# Get the kvpairs in the previously written block
data = await client.read(skvbc.get_block_data_req(last_block))
kv2 = skvbc.parse_reply(data)
self.assertDictEqual(kv2, dict(kv))
async def test_get_block_data_with_blinking_replica(self, bft_network):
"""
Test that the cluster continues working when one blinking replica
By a blinking replic we mean a replica that goes up and down for random
period of time
"""
with blinking_replica.BlinkingReplica() as blinking:
br = random.choice(bft_network.all_replicas(without={0}))
bft_network.start_replicas(replicas=bft_network.all_replicas(
without={br}))
skvbc = kvbc.SimpleKVBCProtocol(bft_network)
blinking.start_blinking(bft_network.start_replica_cmd(br))
for _ in range(300):
# Perform an unconditional KV put.
# Ensure keys aren't identical
await skvbc.read_your_writes(self)