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Add a test that selects too large if BnB is used

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If BnB is used, the test will fail because the transaction is too large.
This commit is contained in:
Andrew Chow 2020-11-30 15:32:06 -05:00
parent 3e69939b78
commit 48a0319bab
1 changed files with 20 additions and 0 deletions
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20
test/functional/rpc_fundrawtransaction.py
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@ -94,6 +94,7 @@ class RawTransactionsTest(BitcoinTestFramework):
self.test_address_reuse()
self.test_option_subtract_fee_from_outputs()
self.test_subtract_fee_with_presets()
self.test_transaction_too_large()
def test_change_position(self):
"""Ensure setting changePosition in fundraw with an exact match is handled properly."""
@ -907,5 +908,24 @@ class RawTransactionsTest(BitcoinTestFramework):
signedtx = self.nodes[0].signrawtransactionwithwallet(fundedtx['hex'])
self.nodes[0].sendrawtransaction(signedtx['hex'])
def test_transaction_too_large(self):
self.log.info("Test fundrawtx where BnB solution would result in a too large transaction, but Knapsack would not")
self.nodes[0].createwallet("large")
wallet = self.nodes[0].get_wallet_rpc(self.default_wallet_name)
recipient = self.nodes[0].get_wallet_rpc("large")
outputs = {}
rawtx = recipient.createrawtransaction([], {wallet.getnewaddress(): 147.99899260})
# Make 1500 0.1 BTC outputs
# The amount that we target for funding is in the BnB range when these outputs are used.
# However if these outputs are selected, the transaction will end up being too large, so it shouldn't use BnB and instead fallback to Knapsack
# but that behavior is not implemented yet. For now we just check that we get an error.
for i in range(0, 1500):
outputs[recipient.getnewaddress()] = 0.1
wallet.sendmany("", outputs)
self.nodes[0].generate(10)
assert_raises_rpc_error(-4, "Transaction too large", recipient.fundrawtransaction, rawtx)
if __name__ == '__main__':
RawTransactionsTest().main()