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bitcoin/test/functional/test_runner.py

698 lines
27 KiB

#!/usr/bin/env python3
# Copyright (c) 2014-2019 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Run regression test suite.
This module calls down into individual test cases via subprocess. It will
forward all unrecognized arguments onto the individual test scripts.
For a description of arguments recognized by test scripts, see
`test/functional/test_framework/test_framework.py:BitcoinTestFramework.main`.
"""
import argparse
from collections import deque
import configparser
import datetime
import os
import time
import shutil
import signal
import sys
import subprocess
import tempfile
import re
import logging
# Formatting. Default colors to empty strings.
BOLD, GREEN, RED, GREY = ("", ""), ("", ""), ("", ""), ("", "")
try:
# Make sure python thinks it can write unicode to its stdout
"\u2713".encode("utf_8").decode(sys.stdout.encoding)
TICK = ""
CROSS = ""
CIRCLE = ""
except UnicodeDecodeError:
TICK = "P "
CROSS = "x "
CIRCLE = "o "
if os.name != 'nt' or sys.getwindowsversion() >= (10, 0, 14393):
if os.name == 'nt':
import ctypes
kernel32 = ctypes.windll.kernel32
ENABLE_VIRTUAL_TERMINAL_PROCESSING = 4
STD_OUTPUT_HANDLE = -11
STD_ERROR_HANDLE = -12
# Enable ascii color control to stdout
stdout = kernel32.GetStdHandle(STD_OUTPUT_HANDLE)
stdout_mode = ctypes.c_int32()
kernel32.GetConsoleMode(stdout, ctypes.byref(stdout_mode))
kernel32.SetConsoleMode(stdout, stdout_mode.value | ENABLE_VIRTUAL_TERMINAL_PROCESSING)
# Enable ascii color control to stderr
stderr = kernel32.GetStdHandle(STD_ERROR_HANDLE)
stderr_mode = ctypes.c_int32()
kernel32.GetConsoleMode(stderr, ctypes.byref(stderr_mode))
kernel32.SetConsoleMode(stderr, stderr_mode.value | ENABLE_VIRTUAL_TERMINAL_PROCESSING)
# primitive formatting on supported
# terminal via ANSI escape sequences:
BOLD = ('\033[0m', '\033[1m')
GREEN = ('\033[0m', '\033[0;32m')
RED = ('\033[0m', '\033[0;31m')
GREY = ('\033[0m', '\033[1;30m')
TEST_EXIT_PASSED = 0
TEST_EXIT_SKIPPED = 77
EXTENDED_SCRIPTS = [
# These tests are not run by default.
# Longest test should go first, to favor running tests in parallel
'feature_pruning.py',
'feature_dbcrash.py',
]
BASE_SCRIPTS = [
# Scripts that are run by default.
# Longest test should go first, to favor running tests in parallel
'wallet_hd.py',
'wallet_backup.py',
# vv Tests less than 5m vv
'mining_getblocktemplate_longpoll.py',
'feature_maxuploadtarget.py',
'feature_block.py',
'rpc_fundrawtransaction.py',
'p2p_compactblocks.py',
'feature_segwit.py',
# vv Tests less than 2m vv
'wallet_basic.py',
'wallet_labels.py',
'p2p_segwit.py',
'p2p_timeouts.py',
'p2p_tx_download.py',
'wallet_dump.py',
'wallet_listtransactions.py',
# vv Tests less than 60s vv
'p2p_sendheaders.py',
'wallet_zapwallettxes.py',
'wallet_importmulti.py',
'mempool_limit.py',
'rpc_txoutproof.py',
'wallet_listreceivedby.py',
'wallet_abandonconflict.py',
'feature_csv_activation.py',
'rpc_rawtransaction.py',
'wallet_address_types.py',
'feature_bip68_sequence.py',
'p2p_feefilter.py',
'feature_reindex.py',
'feature_abortnode.py',
# vv Tests less than 30s vv
'wallet_keypool_topup.py',
'feature_fee_estimation.py',
'interface_zmq.py',
'interface_bitcoin_cli.py',
'mempool_resurrect.py',
'wallet_txn_doublespend.py --mineblock',
'tool_wallet.py',
'wallet_txn_clone.py',
'wallet_txn_clone.py --segwit',
'rpc_getchaintips.py',
'rpc_misc.py',
'interface_rest.py',
'mempool_spend_coinbase.py',
'wallet_avoidreuse.py',
'mempool_reorg.py',
'mempool_persist.py',
'wallet_multiwallet.py',
'wallet_multiwallet.py --usecli',
'wallet_createwallet.py',
'wallet_createwallet.py --usecli',
'wallet_watchonly.py',
'wallet_watchonly.py --usecli',
'interface_http.py',
'interface_rpc.py',
'rpc_psbt.py',
'rpc_users.py',
'feature_proxy.py',
'rpc_signrawtransaction.py',
'wallet_groups.py',
'p2p_disconnect_ban.py',
'rpc_decodescript.py',
'rpc_blockchain.py',
'rpc_deprecated.py',
'wallet_disable.py',
'rpc_net.py',
'wallet_keypool.py',
'p2p_mempool.py',
'rpc_setban.py',
'p2p_blocksonly.py',
'mining_prioritisetransaction.py',
'p2p_invalid_locator.py',
'p2p_invalid_block.py',
'p2p_invalid_messages.py',
'p2p_invalid_tx.py',
'feature_assumevalid.py',
'example_test.py',
'wallet_txn_doublespend.py',
'wallet_txn_clone.py --mineblock',
'feature_notifications.py',
'rpc_getblockfilter.py',
'rpc_invalidateblock.py',
'feature_rbf.py',
'mempool_packages.py',
'mempool_package_onemore.py',
'rpc_createmultisig.py',
'feature_versionbits_warning.py',
'rpc_preciousblock.py',
'wallet_importprunedfunds.py',
'p2p_leak_tx.py',
'rpc_signmessage.py',
'wallet_balance.py',
'feature_nulldummy.py',
'mempool_accept.py',
'wallet_import_rescan.py',
'wallet_import_with_label.py',
'rpc_bind.py --ipv4',
'rpc_bind.py --ipv6',
'rpc_bind.py --nonloopback',
'mining_basic.py',
'wallet_bumpfee.py',
'wallet_bumpfee_totalfee_deprecation.py',
'rpc_named_arguments.py',
'wallet_listsinceblock.py',
'p2p_leak.py',
'wallet_encryption.py',
'feature_dersig.py',
'feature_cltv.py',
'rpc_uptime.py',
'wallet_resendwallettransactions.py',
'wallet_fallbackfee.py',
'feature_minchainwork.py',
'rpc_getblockstats.py',
'wallet_create_tx.py',
'p2p_fingerprint.py',
'feature_uacomment.py',
'wallet_coinbase_category.py',
'feature_filelock.py',
'p2p_unrequested_blocks.py',
'feature_includeconf.py',
'rpc_deriveaddresses.py',
'rpc_deriveaddresses.py --usecli',
'rpc_scantxoutset.py',
'feature_logging.py',
'p2p_node_network_limited.py',
'p2p_permissions.py',
'feature_blocksdir.py',
'feature_config_args.py',
'rpc_help.py',
'feature_help.py',
'feature_shutdown.py',
# Don't append tests at the end to avoid merge conflicts
# Put them in a random line within the section that fits their approximate run-time
]
# Place EXTENDED_SCRIPTS first since it has the 3 longest running tests
ALL_SCRIPTS = EXTENDED_SCRIPTS + BASE_SCRIPTS
NON_SCRIPTS = [
# These are python files that live in the functional tests directory, but are not test scripts.
"combine_logs.py",
"create_cache.py",
"test_runner.py",
]
def main():
# Parse arguments and pass through unrecognised args
parser = argparse.ArgumentParser(add_help=False,
usage='%(prog)s [test_runner.py options] [script options] [scripts]',
description=__doc__,
epilog='''
Help text and arguments for individual test script:''',
formatter_class=argparse.RawTextHelpFormatter)
parser.add_argument('--ansi', action='store_true', default=sys.stdout.isatty(), help="Use ANSI colors and dots in output (enabled by default when standard output is a TTY)")
parser.add_argument('--combinedlogslen', '-c', type=int, default=0, metavar='n', help='On failure, print a log (of length n lines) to the console, combined from the test framework and all test nodes.')
parser.add_argument('--coverage', action='store_true', help='generate a basic coverage report for the RPC interface')
parser.add_argument('--ci', action='store_true', help='Run checks and code that are usually only enabled in a continuous integration environment')
parser.add_argument('--exclude', '-x', help='specify a comma-separated-list of scripts to exclude.')
parser.add_argument('--extended', action='store_true', help='run the extended test suite in addition to the basic tests')
parser.add_argument('--help', '-h', '-?', action='store_true', help='print help text and exit')
parser.add_argument('--jobs', '-j', type=int, default=4, help='how many test scripts to run in parallel. Default=4.')
parser.add_argument('--keepcache', '-k', action='store_true', help='the default behavior is to flush the cache directory on startup. --keepcache retains the cache from the previous testrun.')
parser.add_argument('--quiet', '-q', action='store_true', help='only print dots, results summary and failure logs')
parser.add_argument('--tmpdirprefix', '-t', default=tempfile.gettempdir(), help="Root directory for datadirs")
parser.add_argument('--failfast', action='store_true', help='stop execution after the first test failure')
parser.add_argument('--filter', help='filter scripts to run by regular expression')
args, unknown_args = parser.parse_known_args()
if not args.ansi:
global BOLD, GREEN, RED, GREY
BOLD = ("", "")
GREEN = ("", "")
RED = ("", "")
GREY = ("", "")
# args to be passed on always start with two dashes; tests are the remaining unknown args
tests = [arg for arg in unknown_args if arg[:2] != "--"]
passon_args = [arg for arg in unknown_args if arg[:2] == "--"]
# Read config generated by configure.
config = configparser.ConfigParser()
configfile = os.path.abspath(os.path.dirname(__file__)) + "/../config.ini"
config.read_file(open(configfile, encoding="utf8"))
passon_args.append("--configfile=%s" % configfile)
# Set up logging
logging_level = logging.INFO if args.quiet else logging.DEBUG
logging.basicConfig(format='%(message)s', level=logging_level)
# Create base test directory
tmpdir = "%s/test_runner_₿_🏃_%s" % (args.tmpdirprefix, datetime.datetime.now().strftime("%Y%m%d_%H%M%S"))
os.makedirs(tmpdir)
logging.debug("Temporary test directory at %s" % tmpdir)
enable_bitcoind = config["components"].getboolean("ENABLE_BITCOIND")
if not enable_bitcoind:
print("No functional tests to run.")
print("Rerun ./configure with --with-daemon and then make")
sys.exit(0)
# Build list of tests
test_list = []
if tests:
# Individual tests have been specified. Run specified tests that exist
# in the ALL_SCRIPTS list. Accept names with or without a .py extension.
# Specified tests can contain wildcards, but in that case the supplied
# paths should be coherent, e.g. the same path as that provided to call
# test_runner.py. Examples:
# `test/functional/test_runner.py test/functional/wallet*`
# `test/functional/test_runner.py ./test/functional/wallet*`
# `test_runner.py wallet*`
# but not:
# `test/functional/test_runner.py wallet*`
# Multiple wildcards can be passed:
# `test_runner.py tool* mempool*`
for test in tests:
script = test.split("/")[-1]
script = script + ".py" if ".py" not in script else script
if script in ALL_SCRIPTS:
test_list.append(script)
else:
print("{}WARNING!{} Test '{}' not found in full test list.".format(BOLD[1], BOLD[0], test))
elif args.extended:
# Include extended tests
test_list += ALL_SCRIPTS
else:
# Run base tests only
test_list += BASE_SCRIPTS
# Remove the test cases that the user has explicitly asked to exclude.
if args.exclude:
exclude_tests = [test.split('.py')[0] for test in args.exclude.split(',')]
for exclude_test in exclude_tests:
# Remove <test_name>.py and <test_name>.py --arg from the test list
exclude_list = [test for test in test_list if test.split('.py')[0] == exclude_test]
for exclude_item in exclude_list:
test_list.remove(exclude_item)
if not exclude_list:
print("{}WARNING!{} Test '{}' not found in current test list.".format(BOLD[1], BOLD[0], exclude_test))
if args.filter:
test_list = list(filter(re.compile(args.filter).search, test_list))
if not test_list:
print("No valid test scripts specified. Check that your test is in one "
"of the test lists in test_runner.py, or run test_runner.py with no arguments to run all tests")
sys.exit(0)
if args.help:
# Print help for test_runner.py, then print help of the first script (with args removed) and exit.
parser.print_help()
subprocess.check_call([sys.executable, os.path.join(config["environment"]["SRCDIR"], 'test', 'functional', test_list[0].split()[0]), '-h'])
sys.exit(0)
check_script_list(src_dir=config["environment"]["SRCDIR"], fail_on_warn=args.ci)
check_script_prefixes()
if not args.keepcache:
shutil.rmtree("%s/test/cache" % config["environment"]["BUILDDIR"], ignore_errors=True)
run_tests(
test_list=test_list,
src_dir=config["environment"]["SRCDIR"],
build_dir=config["environment"]["BUILDDIR"],
tmpdir=tmpdir,
jobs=args.jobs,
enable_coverage=args.coverage,
args=passon_args,
combined_logs_len=args.combinedlogslen,
failfast=args.failfast,
runs_ci=args.ci,
use_term_control=args.ansi,
)
def run_tests(*, test_list, src_dir, build_dir, tmpdir, jobs=1, enable_coverage=False, args=None, combined_logs_len=0, failfast=False, runs_ci, use_term_control):
args = args or []
# Warn if bitcoind is already running (unix only)
try:
if subprocess.check_output(["pidof", "bitcoind"]) is not None:
print("%sWARNING!%s There is already a bitcoind process running on this system. Tests may fail unexpectedly due to resource contention!" % (BOLD[1], BOLD[0]))
except (OSError, subprocess.SubprocessError):
pass
# Warn if there is a cache directory
cache_dir = "%s/test/cache" % build_dir
if os.path.isdir(cache_dir):
print("%sWARNING!%s There is a cache directory here: %s. If tests fail unexpectedly, try deleting the cache directory." % (BOLD[1], BOLD[0], cache_dir))
tests_dir = src_dir + '/test/functional/'
flags = ['--cachedir={}'.format(cache_dir)] + args
if enable_coverage:
coverage = RPCCoverage()
flags.append(coverage.flag)
logging.debug("Initializing coverage directory at %s" % coverage.dir)
else:
coverage = None
if len(test_list) > 1 and jobs > 1:
# Populate cache
try:
subprocess.check_output([sys.executable, tests_dir + 'create_cache.py'] + flags + ["--tmpdir=%s/cache" % tmpdir])
except subprocess.CalledProcessError as e:
sys.stdout.buffer.write(e.output)
raise
#Run Tests
job_queue = TestHandler(
num_tests_parallel=jobs,
tests_dir=tests_dir,
tmpdir=tmpdir,
test_list=test_list,
flags=flags,
timeout_duration=40 * 60 if runs_ci else float('inf'), # in seconds
use_term_control=use_term_control,
)
start_time = time.time()
test_results = []
max_len_name = len(max(test_list, key=len))
test_count = len(test_list)
for i in range(test_count):
test_result, testdir, stdout, stderr = job_queue.get_next()
test_results.append(test_result)
done_str = "{}/{} - {}{}{}".format(i + 1, test_count, BOLD[1], test_result.name, BOLD[0])
if test_result.status == "Passed":
logging.debug("%s passed, Duration: %s s" % (done_str, test_result.time))
elif test_result.status == "Skipped":
logging.debug("%s skipped" % (done_str))
else:
print("%s failed, Duration: %s s\n" % (done_str, test_result.time))
print(BOLD[1] + 'stdout:\n' + BOLD[0] + stdout + '\n')
print(BOLD[1] + 'stderr:\n' + BOLD[0] + stderr + '\n')
if combined_logs_len and os.path.isdir(testdir):
# Print the final `combinedlogslen` lines of the combined logs
print('{}Combine the logs and print the last {} lines ...{}'.format(BOLD[1], combined_logs_len, BOLD[0]))
print('\n============')
print('{}Combined log for {}:{}'.format(BOLD[1], testdir, BOLD[0]))
print('============\n')
combined_logs_args = [sys.executable, os.path.join(tests_dir, 'combine_logs.py'), testdir]
if BOLD[0]:
combined_logs_args += ['--color']
combined_logs, _ = subprocess.Popen(combined_logs_args, universal_newlines=True, stdout=subprocess.PIPE).communicate()
print("\n".join(deque(combined_logs.splitlines(), combined_logs_len)))
if failfast:
logging.debug("Early exiting after test failure")
break
print_results(test_results, max_len_name, (int(time.time() - start_time)))
if coverage:
coverage_passed = coverage.report_rpc_coverage()
logging.debug("Cleaning up coverage data")
coverage.cleanup()
else:
coverage_passed = True
# Clear up the temp directory if all subdirectories are gone
if not os.listdir(tmpdir):
os.rmdir(tmpdir)
all_passed = all(map(lambda test_result: test_result.was_successful, test_results)) and coverage_passed
# This will be a no-op unless failfast is True in which case there may be dangling
# processes which need to be killed.
job_queue.kill_and_join()
sys.exit(not all_passed)
def print_results(test_results, max_len_name, runtime):
results = "\n" + BOLD[1] + "%s | %s | %s\n\n" % ("TEST".ljust(max_len_name), "STATUS ", "DURATION") + BOLD[0]
test_results.sort(key=TestResult.sort_key)
all_passed = True
time_sum = 0
for test_result in test_results:
all_passed = all_passed and test_result.was_successful
time_sum += test_result.time
test_result.padding = max_len_name
results += str(test_result)
status = TICK + "Passed" if all_passed else CROSS + "Failed"
if not all_passed:
results += RED[1]
results += BOLD[1] + "\n%s | %s | %s s (accumulated) \n" % ("ALL".ljust(max_len_name), status.ljust(9), time_sum) + BOLD[0]
if not all_passed:
results += RED[0]
results += "Runtime: %s s\n" % (runtime)
print(results)
class TestHandler:
"""
Trigger the test scripts passed in via the list.
"""
def __init__(self, *, num_tests_parallel, tests_dir, tmpdir, test_list, flags, timeout_duration, use_term_control):
assert num_tests_parallel >= 1
self.num_jobs = num_tests_parallel
self.tests_dir = tests_dir
self.tmpdir = tmpdir
self.timeout_duration = timeout_duration
self.test_list = test_list
self.flags = flags
self.num_running = 0
self.jobs = []
self.use_term_control = use_term_control
def get_next(self):
while self.num_running < self.num_jobs and self.test_list:
# Add tests
self.num_running += 1
test = self.test_list.pop(0)
portseed = len(self.test_list)
portseed_arg = ["--portseed={}".format(portseed)]
log_stdout = tempfile.SpooledTemporaryFile(max_size=2**16)
log_stderr = tempfile.SpooledTemporaryFile(max_size=2**16)
test_argv = test.split()
testdir = "{}/{}_{}".format(self.tmpdir, re.sub(".py$", "", test_argv[0]), portseed)
tmpdir_arg = ["--tmpdir={}".format(testdir)]
self.jobs.append((test,
time.time(),
subprocess.Popen([sys.executable, self.tests_dir + test_argv[0]] + test_argv[1:] + self.flags + portseed_arg + tmpdir_arg,
universal_newlines=True,
stdout=log_stdout,
stderr=log_stderr),
testdir,
log_stdout,
log_stderr))
if not self.jobs:
raise IndexError('pop from empty list')
# Print remaining running jobs when all jobs have been started.
if not self.test_list:
print("Remaining jobs: [{}]".format(", ".join(j[0] for j in self.jobs)))
dot_count = 0
while True:
# Return first proc that finishes
time.sleep(.5)
for job in self.jobs:
(name, start_time, proc, testdir, log_out, log_err) = job
if int(time.time() - start_time) > self.timeout_duration:
# Timeout individual tests if timeout is specified (to stop
# tests hanging and not providing useful output).
proc.send_signal(signal.SIGINT)
if proc.poll() is not None:
log_out.seek(0), log_err.seek(0)
[stdout, stderr] = [log_file.read().decode('utf-8') for log_file in (log_out, log_err)]
log_out.close(), log_err.close()
if proc.returncode == TEST_EXIT_PASSED and stderr == "":
status = "Passed"
elif proc.returncode == TEST_EXIT_SKIPPED:
status = "Skipped"
else:
status = "Failed"
self.num_running -= 1
self.jobs.remove(job)
if self.use_term_control:
clearline = '\r' + (' ' * dot_count) + '\r'
print(clearline, end='', flush=True)
dot_count = 0
return TestResult(name, status, int(time.time() - start_time)), testdir, stdout, stderr
if self.use_term_control:
print('.', end='', flush=True)
dot_count += 1
def kill_and_join(self):
"""Send SIGKILL to all jobs and block until all have ended."""
procs = [i[2] for i in self.jobs]
for proc in procs:
proc.kill()
for proc in procs:
proc.wait()
class TestResult():
def __init__(self, name, status, time):
self.name = name
self.status = status
self.time = time
self.padding = 0
def sort_key(self):
if self.status == "Passed":
return 0, self.name.lower()
elif self.status == "Failed":
return 2, self.name.lower()
elif self.status == "Skipped":
return 1, self.name.lower()
def __repr__(self):
if self.status == "Passed":
color = GREEN
glyph = TICK
elif self.status == "Failed":
color = RED
glyph = CROSS
elif self.status == "Skipped":
color = GREY
glyph = CIRCLE
return color[1] + "%s | %s%s | %s s\n" % (self.name.ljust(self.padding), glyph, self.status.ljust(7), self.time) + color[0]
@property
def was_successful(self):
return self.status != "Failed"
def check_script_prefixes():
"""Check that test scripts start with one of the allowed name prefixes."""
good_prefixes_re = re.compile("(example|feature|interface|mempool|mining|p2p|rpc|wallet|tool)_")
bad_script_names = [script for script in ALL_SCRIPTS if good_prefixes_re.match(script) is None]
if bad_script_names:
print("%sERROR:%s %d tests not meeting naming conventions:" % (BOLD[1], BOLD[0], len(bad_script_names)))
print(" %s" % ("\n ".join(sorted(bad_script_names))))
raise AssertionError("Some tests are not following naming convention!")
def check_script_list(*, src_dir, fail_on_warn):
"""Check scripts directory.
Check that there are no scripts in the functional tests directory which are
not being run by pull-tester.py."""
script_dir = src_dir + '/test/functional/'
python_files = set([test_file for test_file in os.listdir(script_dir) if test_file.endswith(".py")])
missed_tests = list(python_files - set(map(lambda x: x.split()[0], ALL_SCRIPTS + NON_SCRIPTS)))
if len(missed_tests) != 0:
print("%sWARNING!%s The following scripts are not being run: %s. Check the test lists in test_runner.py." % (BOLD[1], BOLD[0], str(missed_tests)))
if fail_on_warn:
# On CI this warning is an error to prevent merging incomplete commits into master
sys.exit(1)
class RPCCoverage():
"""
Coverage reporting utilities for test_runner.
Coverage calculation works by having each test script subprocess write
coverage files into a particular directory. These files contain the RPC
commands invoked during testing, as well as a complete listing of RPC
commands per `bitcoin-cli help` (`rpc_interface.txt`).
After all tests complete, the commands run are combined and diff'd against
the complete list to calculate uncovered RPC commands.
See also: test/functional/test_framework/coverage.py
"""
def __init__(self):
self.dir = tempfile.mkdtemp(prefix="coverage")
self.flag = '--coveragedir=%s' % self.dir
def report_rpc_coverage(self):
"""
Print out RPC commands that were unexercised by tests.
"""
uncovered = self._get_uncovered_rpc_commands()
if uncovered:
print("Uncovered RPC commands:")
print("".join((" - %s\n" % command) for command in sorted(uncovered)))
return False
else:
print("All RPC commands covered.")
return True
def cleanup(self):
return shutil.rmtree(self.dir)
def _get_uncovered_rpc_commands(self):
"""
Return a set of currently untested RPC commands.
"""
# This is shared from `test/functional/test-framework/coverage.py`
reference_filename = 'rpc_interface.txt'
coverage_file_prefix = 'coverage.'
coverage_ref_filename = os.path.join(self.dir, reference_filename)
coverage_filenames = set()
all_cmds = set()
covered_cmds = set()
if not os.path.isfile(coverage_ref_filename):
raise RuntimeError("No coverage reference found")
with open(coverage_ref_filename, 'r', encoding="utf8") as coverage_ref_file:
all_cmds.update([line.strip() for line in coverage_ref_file.readlines()])
for root, _, files in os.walk(self.dir):
for filename in files:
if filename.startswith(coverage_file_prefix):
coverage_filenames.add(os.path.join(root, filename))
for filename in coverage_filenames:
with open(filename, 'r', encoding="utf8") as coverage_file:
covered_cmds.update([line.strip() for line in coverage_file.readlines()])
return all_cmds - covered_cmds
if __name__ == '__main__':
main()