def test_enqueue(block_processor):
# The state is updated after receiving a new block (and only if the block is not already known).
# Let's start by adding some hashes to last_tips
chain_monitor = ChainMonitor([Queue(), Queue()], block_processor, bitcoind_feed_params)
chain_monitor.last_tips = [get_random_value_hex(32) for _ in range(5)]
# Now we can try to update the state with an hash already seen and see how it doesn't work
assert chain_monitor.enqueue(chain_monitor.last_tips[0]) is False
# The state should be correctly updated with a new block hash, which should be added as last element of last_tips
another_block_hash = get_random_value_hex(32)
assert chain_monitor.enqueue(another_block_hash) is True
assert chain_monitor.last_tips[-1] == another_block_hash
def test_monitor_chain_single_update(block_processor):
# This test tests that if both threads try to add the same block to the queue, only the first one will make it
chain_monitor = ChainMonitor([Queue(), Queue()], block_processor, bitcoind_feed_params)
chain_monitor.polling_delta = 2
# We will create a block and wait for the polling thread. Then check the queues to see that the block hash has only
# been added once.
chain_monitor.monitor_chain()
chain_monitor.activate()
generate_blocks(1)
assert len(chain_monitor.receiving_queues) == 2
queue0_block = chain_monitor.receiving_queues[0].get()
queue1_block = chain_monitor.receiving_queues[1].get()
assert queue0_block == queue1_block
assert chain_monitor.receiving_queues[0].empty()
assert chain_monitor.receiving_queues[1].empty()
# The delta for polling is 2 secs, so let's wait and see
time.sleep(2)
assert chain_monitor.receiving_queues[0].empty()
assert chain_monitor.receiving_queues[1].empty()
# We can also force an update and see that it won't go through
assert chain_monitor.enqueue(queue0_block) is False
chain_monitor.terminate()
# The zmq thread needs a block generation to release from the recv method.
generate_blocks(1)