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Diffstat (limited to 'test/functional/test_framework/test_node.py')
-rwxr-xr-x | test/functional/test_framework/test_node.py | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/test/functional/test_framework/test_node.py b/test/functional/test_framework/test_node.py new file mode 100755 index 0000000000..efb3ac9d16 --- /dev/null +++ b/test/functional/test_framework/test_node.py @@ -0,0 +1,171 @@ +#!/usr/bin/env python3 +# Copyright (c) 2017 The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or http://www.opensource.org/licenses/mit-license.php. +"""Class for bitcoind node under test""" + +import decimal +import errno +import http.client +import json +import logging +import os +import subprocess +import time + +from .util import ( + assert_equal, + get_rpc_proxy, + rpc_url, +) +from .authproxy import JSONRPCException + +class TestNode(): + """A class for representing a bitcoind node under test. + + This class contains: + + - state about the node (whether it's running, etc) + - a Python subprocess.Popen object representing the running process + - an RPC connection to the node + + To make things easier for the test writer, a bit of magic is happening under the covers. + Any unrecognised messages will be dispatched to the RPC connection.""" + + def __init__(self, i, dirname, extra_args, rpchost, timewait, binary, stderr, mocktime, coverage_dir): + self.index = i + self.datadir = os.path.join(dirname, "node" + str(i)) + self.rpchost = rpchost + if timewait: + self.rpc_timeout = timewait + else: + # Wait for up to 60 seconds for the RPC server to respond + self.rpc_timeout = 60 + if binary is None: + self.binary = os.getenv("BITCOIND", "bitcoind") + else: + self.binary = binary + self.stderr = stderr + self.coverage_dir = coverage_dir + # Most callers will just need to add extra args to the standard list below. For those callers that need more flexibity, they can just set the args property directly. + self.extra_args = extra_args + self.args = [self.binary, "-datadir=" + self.datadir, "-server", "-keypool=1", "-discover=0", "-rest", "-logtimemicros", "-debug", "-debugexclude=libevent", "-debugexclude=leveldb", "-mocktime=" + str(mocktime), "-uacomment=testnode%d" % i] + + self.cli = TestNodeCLI(os.getenv("BITCOINCLI", "bitcoin-cli"), self.datadir) + + self.running = False + self.process = None + self.rpc_connected = False + self.rpc = None + self.url = None + self.log = logging.getLogger('TestFramework.node%d' % i) + + def __getattr__(self, *args, **kwargs): + """Dispatches any unrecognised messages to the RPC connection.""" + assert self.rpc_connected and self.rpc is not None, "Error: no RPC connection" + return self.rpc.__getattr__(*args, **kwargs) + + def start(self, extra_args=None, stderr=None): + """Start the node.""" + if extra_args is None: + extra_args = self.extra_args + if stderr is None: + stderr = self.stderr + self.process = subprocess.Popen(self.args + extra_args, stderr=stderr) + self.running = True + self.log.debug("bitcoind started, waiting for RPC to come up") + + def wait_for_rpc_connection(self): + """Sets up an RPC connection to the bitcoind process. Returns False if unable to connect.""" + # Poll at a rate of four times per second + poll_per_s = 4 + for _ in range(poll_per_s * self.rpc_timeout): + assert self.process.poll() is None, "bitcoind exited with status %i during initialization" % self.process.returncode + try: + self.rpc = get_rpc_proxy(rpc_url(self.datadir, self.index, self.rpchost), self.index, timeout=self.rpc_timeout, coveragedir=self.coverage_dir) + self.rpc.getblockcount() + # If the call to getblockcount() succeeds then the RPC connection is up + self.rpc_connected = True + self.url = self.rpc.url + self.log.debug("RPC successfully started") + return + except IOError as e: + if e.errno != errno.ECONNREFUSED: # Port not yet open? + raise # unknown IO error + except JSONRPCException as e: # Initialization phase + if e.error['code'] != -28: # RPC in warmup? + raise # unknown JSON RPC exception + except ValueError as e: # cookie file not found and no rpcuser or rpcassword. bitcoind still starting + if "No RPC credentials" not in str(e): + raise + time.sleep(1.0 / poll_per_s) + raise AssertionError("Unable to connect to bitcoind") + + def get_wallet_rpc(self, wallet_name): + assert self.rpc_connected + assert self.rpc + wallet_path = "wallet/%s" % wallet_name + return self.rpc / wallet_path + + def stop_node(self): + """Stop the node.""" + if not self.running: + return + self.log.debug("Stopping node") + try: + self.stop() + except http.client.CannotSendRequest: + self.log.exception("Unable to stop node.") + + def is_node_stopped(self): + """Checks whether the node has stopped. + + Returns True if the node has stopped. False otherwise. + This method is responsible for freeing resources (self.process).""" + if not self.running: + return True + return_code = self.process.poll() + if return_code is not None: + # process has stopped. Assert that it didn't return an error code. + assert_equal(return_code, 0) + self.running = False + self.process = None + self.log.debug("Node stopped") + return True + return False + + def node_encrypt_wallet(self, passphrase): + """"Encrypts the wallet. + + This causes bitcoind to shutdown, so this method takes + care of cleaning up resources.""" + self.encryptwallet(passphrase) + while not self.is_node_stopped(): + time.sleep(0.1) + self.rpc = None + self.rpc_connected = False + +class TestNodeCLI(): + """Interface to bitcoin-cli for an individual node""" + + def __init__(self, binary, datadir): + self.binary = binary + self.datadir = datadir + + def __getattr__(self, command): + def dispatcher(*args, **kwargs): + return self.send_cli(command, *args, **kwargs) + return dispatcher + + def send_cli(self, command, *args, **kwargs): + """Run bitcoin-cli command. Deserializes returned string as python object.""" + + pos_args = [str(arg) for arg in args] + named_args = [str(key) + "=" + str(value) for (key, value) in kwargs.items()] + assert not (pos_args and named_args), "Cannot use positional arguments and named arguments in the same bitcoin-cli call" + p_args = [self.binary, "-datadir=" + self.datadir] + if named_args: + p_args += ["-named"] + p_args += [command] + pos_args + named_args + cli_output = subprocess.check_output(p_args, universal_newlines=True) + return json.loads(cli_output, parse_float=decimal.Decimal) |