Helper functions for creating blocks and transactions.
P2P test design notes
Mininode
mininode.py contains all the definitions for objects that pass
over the network (CBlock, CTransaction, etc, along with the network-level
wrappers for them, msg_block, msg_tx, etc).
P2P tests have two threads. One thread handles all network communication
with the bitcoind(s) being tested (using python's asyncore package); the other
implements the test logic.
NodeConn is the class used to connect to a bitcoind. If you implement
a callback class that derives from NodeConnCB and pass that to the
NodeConn object, your code will receive the appropriate callbacks when
events of interest arrive. NOTE: be sure to call
self.create_callback_map() in your derived classes' __init__
function, so that the correct mappings are set up between p2p messages and your
callback functions.
You can pass the same handler to multiple NodeConn's if you like, or pass
different ones to each -- whatever makes the most sense for your test.
Call NetworkThread.start() after all NodeConn objects are created to
start the networking thread. (Continue with the test logic in your existing
thread.)
RPC calls are available in p2p tests.
Can be used to write free-form tests, where specific p2p-protocol behavior
is tested. Examples: p2p-accept-block.py, maxblocksinflight.py.
Comptool
Testing framework for writing tests that compare the block/tx acceptance
behavior of a bitcoind against 1 or more other bitcoind instances, or against
known outcomes, or both.
Set the num_nodes variable (defined in ComparisonTestFramework) to start up
1 or more nodes. If using 1 node, then --testbinary can be used as a command line
option to change the bitcoind binary used by the test. If using 2 or more nodes,
then --refbinary can be optionally used to change the bitcoind that will be used
on nodes 2 and up.
Implement a (generator) function called get_tests() which yields TestInstances.
Each TestInstance consists of:
a list of [object, outcome, hash] entries
object is a CBlock, CTransaction, or
CBlockHeader. CBlock's and CTransaction's are tested for
acceptance. CBlockHeaders can be used so that the test runner can deliver
complete headers-chains when requested from the bitcoind, to allow writing
tests where blocks can be delivered out of order but still processed by
headers-first bitcoind's.
outcome is True, False, or None. If True
or False, the tip is compared with the expected tip -- either the
block passed in, or the hash specified as the optional 3rd entry. If
None is specified, then the test will compare all the bitcoind's
being tested to see if they all agree on what the best tip is.
hash is the block hash of the tip to compare against. Optional to
specify; if left out then the hash of the block passed in will be used as
the expected tip. This allows for specifying an expected tip while testing
the handling of either invalid blocks or blocks delivered out of order,
which complete a longer chain.
sync_every_block: True/False. If False, then all blocks
are inv'ed together, and the test runner waits until the node receives the
last one, and tests only the last block for tip acceptance using the
outcome and specified tip. If True, then each block is tested in
sequence and synced (this is slower when processing many blocks).
sync_every_transaction: True/False. Analogous to
sync_every_block, except if the outcome on the last tx is "None",
then the contents of the entire mempool are compared across all bitcoind
connections. If True or False, then only the last tx's
acceptance is tested against the given outcome.
For examples of tests written in this framework, see
invalidblockrequest.py and p2p-fullblocktest.py.