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pytest: test shadow routing in pay plugin

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darosior 2019-11-02 21:24:14 +01:00 • committed by Rusty Russell
parent 7dac7a8c52
commit 208123771e
1 changed files with 25 additions and 0 deletions
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25
tests/test_pay.py
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@ -2344,3 +2344,28 @@ def test_error_returns_blockheight(node_factory, bitcoind):
# * [`u32`:`height`]
assert (err.value.error['data']['raw_message']
== '400f{:016x}{:08x}'.format(100, bitcoind.rpc.getblockcount()))
@flaky
def test_shadow_routing(node_factory):
"""
Test the value randomization through shadow routing
Since there is a very low (0.5**10) probability that it fails we mark it
as flaky.
"""
# We need l3 for random walk
l1, l2, l3 = node_factory.line_graph(3, wait_for_announce=True)
amount = 10000
total_amount = 0
n_payments = 10
for i in range(n_payments):
inv = l3.rpc.invoice(amount, "{}".format(i), "test")["bolt11"]
total_amount += l1.rpc.pay(inv)["amount_msat"]
assert total_amount.millisatoshis > n_payments * amount
# Test that the added amount isn't absurd
assert total_amount.millisatoshis < (n_payments * amount) * (1 + 0.01)
# FIXME: Test cltv delta too ?