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pytest: stress test funding_cancel vs funding_complete

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This fails, because they fight over the fc->cmd pointer, leaving
others hanging.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2019-06-12 15:52:53 +09:30 • committed by neil saitug
parent 2945b25b57
commit 13dbe6e74b
1 changed files with 57 additions and 1 deletions
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58
tests/test_connection.py
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@ -2,7 +2,7 @@ from collections import namedtuple
from fixtures import * # noqa: F401,F403
from flaky import flaky # noqa: F401
from lightning import RpcError
from utils import DEVELOPER, only_one, wait_for, sync_blockheight, VALGRIND
from utils import DEVELOPER, only_one, wait_for, sync_blockheight, VALGRIND, TIMEOUT
from bitcoin.core import CMutableTransaction, CMutableTxOut
import binascii
@ -853,6 +853,62 @@ def test_funding_external_wallet_corners(node_factory, bitcoind):
l1.rpc.fundchannel_start(l2.info['id'], amount)
@pytest.mark.xfail(strict=True)
def test_funding_cancel_race(node_factory, bitcoind, executor):
l1 = node_factory.get_node()
nodes = node_factory.get_nodes(100)
# Speed up cleanup by not cleaning our test nodes: on my laptop, this goes
# from 214 to 15 seconds
node_factory.nodes = [l1]
num_complete = 0
num_cancel = 0
for n in nodes:
l1.rpc.connect(n.info['id'], 'localhost', n.port)
l1.rpc.fundchannel_start(n.info['id'], "100000sat")
# We simply make up txids. And submit two of each at once.
completes = [executor.submit(l1.rpc.fundchannel_complete, n.info['id'], "9f1844419d2f41532a57fb5ef038cacb602000f7f37b3dae68dc2d047c89048f", 0),
executor.submit(l1.rpc.fundchannel_complete, n.info['id'], "9f1844419d2f41532a57fb5ef038cacb602000f7f37b3dae68dc2d047c89048f", 0)]
cancels = [executor.submit(l1.rpc.fundchannel_cancel, n.info['id']),
executor.submit(l1.rpc.fundchannel_cancel, n.info['id'])]
# Only one should succeed.
success = False
for c in completes:
try:
c.result(TIMEOUT)
num_complete += 1
assert not success
success = True
except RpcError:
pass
# These may both succeed, iff the above didn't.
cancelled = False
for c in cancels:
try:
c.result(TIMEOUT)
cancelled = True
assert not success
except RpcError:
pass
if cancelled:
num_cancel += 1
else:
assert success
print("Cancelled {} complete {}".format(num_cancel, num_complete))
assert num_cancel + num_complete == len(nodes)
# We should have raced at least once!
assert num_cancel > 0
assert num_complete > 0
def test_funding_external_wallet(node_factory, bitcoind):
l1 = node_factory.get_node()
l2 = node_factory.get_node()