220 lines
8.8 KiB
Python
Executable file
220 lines
8.8 KiB
Python
Executable file
#!/usr/bin/env python3
|
|
# Copyright (c) 2017-2019 The Bitcoin Core developers
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
"""An example functional test
|
|
|
|
The module-level docstring should include a high-level description of
|
|
what the test is doing. It's the first thing people see when they open
|
|
the file and should give the reader information about *what* the test
|
|
is testing and *how* it's being tested
|
|
"""
|
|
# Imports should be in PEP8 ordering (std library first, then third party
|
|
# libraries then local imports).
|
|
from collections import defaultdict
|
|
|
|
# Avoid wildcard * imports
|
|
from test_framework.blocktools import (create_block, create_coinbase)
|
|
from test_framework.messages import CInv
|
|
from test_framework.mininode import (
|
|
P2PInterface,
|
|
mininode_lock,
|
|
msg_block,
|
|
msg_getdata,
|
|
)
|
|
from test_framework.test_framework import BitcoinTestFramework
|
|
from test_framework.util import (
|
|
assert_equal,
|
|
connect_nodes,
|
|
wait_until,
|
|
)
|
|
|
|
# P2PInterface is a class containing callbacks to be executed when a P2P
|
|
# message is received from the node-under-test. Subclass P2PInterface and
|
|
# override the on_*() methods if you need custom behaviour.
|
|
class BaseNode(P2PInterface):
|
|
def __init__(self):
|
|
"""Initialize the P2PInterface
|
|
|
|
Used to initialize custom properties for the Node that aren't
|
|
included by default in the base class. Be aware that the P2PInterface
|
|
base class already stores a counter for each P2P message type and the
|
|
last received message of each type, which should be sufficient for the
|
|
needs of most tests.
|
|
|
|
Call super().__init__() first for standard initialization and then
|
|
initialize custom properties."""
|
|
super().__init__()
|
|
# Stores a dictionary of all blocks received
|
|
self.block_receive_map = defaultdict(int)
|
|
|
|
def on_block(self, message):
|
|
"""Override the standard on_block callback
|
|
|
|
Store the hash of a received block in the dictionary."""
|
|
message.block.calc_sha256()
|
|
self.block_receive_map[message.block.sha256] += 1
|
|
|
|
def on_inv(self, message):
|
|
"""Override the standard on_inv callback"""
|
|
pass
|
|
|
|
def custom_function():
|
|
"""Do some custom behaviour
|
|
|
|
If this function is more generally useful for other tests, consider
|
|
moving it to a module in test_framework."""
|
|
# self.log.info("running custom_function") # Oops! Can't run self.log outside the BitcoinTestFramework
|
|
pass
|
|
|
|
|
|
class ExampleTest(BitcoinTestFramework):
|
|
# Each functional test is a subclass of the BitcoinTestFramework class.
|
|
|
|
# Override the set_test_params(), skip_test_if_missing_module(), add_options(), setup_chain(), setup_network()
|
|
# and setup_nodes() methods to customize the test setup as required.
|
|
|
|
def set_test_params(self):
|
|
"""Override test parameters for your individual test.
|
|
|
|
This method must be overridden and num_nodes must be explicitly set."""
|
|
self.setup_clean_chain = True
|
|
self.num_nodes = 3
|
|
# Use self.extra_args to change command-line arguments for the nodes
|
|
self.extra_args = [[], ["-logips"], []]
|
|
|
|
# self.log.info("I've finished set_test_params") # Oops! Can't run self.log before run_test()
|
|
|
|
def skip_test_if_missing_module(self):
|
|
self.skip_if_no_wallet()
|
|
|
|
# Use skip_test_if_missing_module() to skip the test if your test requires certain modules to be present.
|
|
# This test uses generate which requires wallet to be compiled
|
|
def skip_test_if_missing_module(self):
|
|
self.skip_if_no_wallet()
|
|
|
|
# Use add_options() to add specific command-line options for your test.
|
|
# In practice this is not used very much, since the tests are mostly written
|
|
# to be run in automated environments without command-line options.
|
|
# def add_options()
|
|
# pass
|
|
|
|
# Use setup_chain() to customize the node data directories. In practice
|
|
# this is not used very much since the default behaviour is almost always
|
|
# fine
|
|
# def setup_chain():
|
|
# pass
|
|
|
|
def setup_network(self):
|
|
"""Setup the test network topology
|
|
|
|
Often you won't need to override this, since the standard network topology
|
|
(linear: node0 <-> node1 <-> node2 <-> ...) is fine for most tests.
|
|
|
|
If you do override this method, remember to start the nodes, assign
|
|
them to self.nodes, connect them and then sync."""
|
|
|
|
self.setup_nodes()
|
|
|
|
# In this test, we're not connecting node2 to node0 or node1. Calls to
|
|
# sync_all() should not include node2, since we're not expecting it to
|
|
# sync.
|
|
connect_nodes(self.nodes[0], 1)
|
|
self.sync_all(self.nodes[0:2])
|
|
|
|
# Use setup_nodes() to customize the node start behaviour (for example if
|
|
# you don't want to start all nodes at the start of the test).
|
|
# def setup_nodes():
|
|
# pass
|
|
|
|
def custom_method(self):
|
|
"""Do some custom behaviour for this test
|
|
|
|
Define it in a method here because you're going to use it repeatedly.
|
|
If you think it's useful in general, consider moving it to the base
|
|
BitcoinTestFramework class so other tests can use it."""
|
|
|
|
self.log.info("Running custom_method")
|
|
|
|
def run_test(self):
|
|
"""Main test logic"""
|
|
|
|
# Create P2P connections will wait for a verack to make sure the connection is fully up
|
|
self.nodes[0].add_p2p_connection(BaseNode())
|
|
|
|
# Generating a block on one of the nodes will get us out of IBD
|
|
blocks = [int(self.nodes[0].generate(nblocks=1)[0], 16)]
|
|
self.sync_all(self.nodes[0:2])
|
|
|
|
# Notice above how we called an RPC by calling a method with the same
|
|
# name on the node object. Notice also how we used a keyword argument
|
|
# to specify a named RPC argument. Neither of those are defined on the
|
|
# node object. Instead there's some __getattr__() magic going on under
|
|
# the covers to dispatch unrecognised attribute calls to the RPC
|
|
# interface.
|
|
|
|
# Logs are nice. Do plenty of them. They can be used in place of comments for
|
|
# breaking the test into sub-sections.
|
|
self.log.info("Starting test!")
|
|
|
|
self.log.info("Calling a custom function")
|
|
custom_function()
|
|
|
|
self.log.info("Calling a custom method")
|
|
self.custom_method()
|
|
|
|
self.log.info("Create some blocks")
|
|
self.tip = int(self.nodes[0].getbestblockhash(), 16)
|
|
self.block_time = self.nodes[0].getblock(self.nodes[0].getbestblockhash())['time'] + 1
|
|
|
|
height = self.nodes[0].getblockcount()
|
|
|
|
for i in range(10):
|
|
# Use the mininode and blocktools functionality to manually build a block
|
|
# Calling the generate() rpc is easier, but this allows us to exactly
|
|
# control the blocks and transactions.
|
|
block = create_block(self.tip, create_coinbase(height+1), self.block_time)
|
|
block.solve()
|
|
block_message = msg_block(block)
|
|
# Send message is used to send a P2P message to the node over our P2PInterface
|
|
self.nodes[0].p2p.send_message(block_message)
|
|
self.tip = block.sha256
|
|
blocks.append(self.tip)
|
|
self.block_time += 1
|
|
height += 1
|
|
|
|
self.log.info("Wait for node1 to reach current tip (height 11) using RPC")
|
|
self.nodes[1].waitforblockheight(11)
|
|
|
|
self.log.info("Connect node2 and node1")
|
|
connect_nodes(self.nodes[1], 2)
|
|
|
|
self.log.info("Wait for node2 to receive all the blocks from node1")
|
|
self.sync_all()
|
|
|
|
self.log.info("Add P2P connection to node2")
|
|
self.nodes[0].disconnect_p2ps()
|
|
|
|
self.nodes[2].add_p2p_connection(BaseNode())
|
|
|
|
self.log.info("Test that node2 propagates all the blocks to us")
|
|
|
|
getdata_request = msg_getdata()
|
|
for block in blocks:
|
|
getdata_request.inv.append(CInv(2, block))
|
|
self.nodes[2].p2p.send_message(getdata_request)
|
|
|
|
# wait_until() will loop until a predicate condition is met. Use it to test properties of the
|
|
# P2PInterface objects.
|
|
wait_until(lambda: sorted(blocks) == sorted(list(self.nodes[2].p2p.block_receive_map.keys())), timeout=5, lock=mininode_lock)
|
|
|
|
self.log.info("Check that each block was received only once")
|
|
# The network thread uses a global lock on data access to the P2PConnection objects when sending and receiving
|
|
# messages. The test thread should acquire the global lock before accessing any P2PConnection data to avoid locking
|
|
# and synchronization issues. Note wait_until() acquires this global lock when testing the predicate.
|
|
with mininode_lock:
|
|
for block in self.nodes[2].p2p.block_receive_map.values():
|
|
assert_equal(block, 1)
|
|
|
|
if __name__ == '__main__':
|
|
ExampleTest().main()
|