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55 lines
2.2 KiB
Python
Executable File
55 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2014-2021 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Test fee estimates persistence.
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By default, bitcoind will dump fee estimates on shutdown and
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then reload it on startup.
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Test is as follows:
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- start node0
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- call the savefeeestimates RPC and verify the RPC succeeds and
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that the file exists
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- make the file read only and attempt to call the savefeeestimates RPC
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with the expecation that it will fail
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- move the read only file and shut down the node, verify the node writes
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on shutdown a file that is identical to the one we saved via the RPC
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"""
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import filecmp
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import os
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_raises_rpc_error
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class FeeEstimatesPersistTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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def run_test(self):
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fee_estimatesdat = os.path.join(self.nodes[0].chain_path, 'fee_estimates.dat')
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self.log.debug('Verify the fee_estimates.dat file does not exists on start up')
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assert not os.path.isfile(fee_estimatesdat)
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self.nodes[0].savefeeestimates()
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self.log.debug('Verify the fee_estimates.dat file exists after calling savefeeestimates RPC')
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assert os.path.isfile(fee_estimatesdat)
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self.log.debug("Prevent bitcoind from writing fee_estimates.dat to disk. Verify that `savefeeestimates` fails")
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fee_estimatesdatold = fee_estimatesdat + '.old'
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os.rename(fee_estimatesdat, fee_estimatesdatold)
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os.mkdir(fee_estimatesdat)
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assert_raises_rpc_error(-1, "Unable to dump fee estimates to disk", self.nodes[0].savefeeestimates)
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os.rmdir(fee_estimatesdat)
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self.stop_nodes()
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self.log.debug("Verify that fee_estimates are written on shutdown")
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assert os.path.isfile(fee_estimatesdat)
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self.log.debug("Verify that the fee estimates from a shutdown are identical from the ones from savefeeestimates")
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assert filecmp.cmp(fee_estimatesdat, fee_estimatesdatold)
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if __name__ == "__main__":
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FeeEstimatesPersistTest(__file__).main()
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