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pytest: generalize tests.

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Anchor outputs break many assumptions in our tests:

1. Remove some hardcoded numbers in favor of a fee calc, so we only have to
   change in one place.
   FIXME: This should also be done for elements!
2. Do binary search to get feerate for a given closing fee.
3. Don't assume output #0: anchor outputs perturb them.
4. Don't assume we can make 1ksat channels (anchors cost 660 sats!).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2020-08-14 11:00:39 +09:30
parent f0afd060db
commit 8cf2fff91b
6 changed files with 33 additions and 12 deletions
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4
tests/test_plugin.py
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@@ -1211,9 +1211,9 @@ def test_bcli(node_factory, bitcoind, chainparams):
l1.fundwallet(10**5)
l1.connect(l2)
fc = l1.rpc.fundchannel(l2.info["id"], 10**4)
fc = l1.rpc.fundchannel(l2.info["id"], 10**4 * 2)
txo = l1.rpc.call("getutxout", {"txid": fc['txid'], "vout": fc['outnum']})
assert (Millisatoshi(txo["amount"]) == Millisatoshi(10**4 * 10**3)
assert (Millisatoshi(txo["amount"]) == Millisatoshi(10**4 * 2 * 10**3)
and txo["script"].startswith("0020"))
l1.rpc.close(l2.info["id"])
# When output is spent, it should give us null !