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littlefs/scripts/test.py

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#!/usr/bin/env python3
# This script manages littlefs tests, which are configured with
# .toml files stored in the tests directory.
#
import toml
import glob
import re
import os
import io
import itertools as it
import collections.abc as abc
import subprocess as sp
import base64
import sys
import copy
import shlex
import pty
import errno
import signal
TEST_PATHS = 'tests'
RULES = """
# add block devices to sources
TESTSRC ?= $(SRC) $(wildcard bd/*.c)
define FLATTEN
%(path)s%%$(subst /,.,$(target)): $(target)
./scripts/explode_asserts.py $$< -o $$@
endef
$(foreach target,$(TESTSRC),$(eval $(FLATTEN)))
-include %(path)s*.d
.SECONDARY:
%(path)s.test: %(path)s.test.o \\
$(foreach t,$(subst /,.,$(TESTSRC:.c=.o)),%(path)s.$t)
$(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
# needed in case builddir is different
%(path)s%%.o: %(path)s%%.c
$(CC) -c -MMD $(CFLAGS) $< -o $@
"""
COVERAGE_RULES = """
%(path)s.test: override CFLAGS += -fprofile-arcs -ftest-coverage
# delete lingering coverage
%(path)s.test: | %(path)s.info.clean
.PHONY: %(path)s.info.clean
%(path)s.info.clean:
rm -f %(path)s*.gcda
# accumulate coverage info
.PHONY: %(path)s.info
%(path)s.info:
$(strip $(LCOV) -c \\
$(addprefix -d ,$(wildcard %(path)s*.gcda)) \\
--rc 'geninfo_adjust_src_path=$(shell pwd)' \\
-o $@)
$(LCOV) -e $@ $(addprefix /,$(SRC)) -o $@
ifdef COVERAGETARGET
$(strip $(LCOV) -a $@ \\
$(addprefix -a ,$(wildcard $(COVERAGETARGET))) \\
-o $(COVERAGETARGET))
endif
"""
GLOBALS = """
//////////////// AUTOGENERATED TEST ////////////////
#include "lfs.h"
#include "bd/lfs_testbd.h"
#include <stdio.h>
extern const char *lfs_testbd_path;
extern uint32_t lfs_testbd_cycles;
"""
DEFINES = {
'LFS_READ_SIZE': 16,
'LFS_PROG_SIZE': 'LFS_READ_SIZE',
'LFS_BLOCK_SIZE': 512,
'LFS_BLOCK_COUNT': 1024,
'LFS_BLOCK_CYCLES': -1,
'LFS_CACHE_SIZE': '(64 % LFS_PROG_SIZE == 0 ? 64 : LFS_PROG_SIZE)',
'LFS_LOOKAHEAD_SIZE': 16,
'LFS_ERASE_VALUE': 0xff,
'LFS_ERASE_CYCLES': 0,
'LFS_BADBLOCK_BEHAVIOR': 'LFS_TESTBD_BADBLOCK_PROGERROR',
}
PROLOGUE = """
// prologue
__attribute__((unused)) lfs_t lfs;
__attribute__((unused)) lfs_testbd_t bd;
__attribute__((unused)) lfs_file_t file;
__attribute__((unused)) lfs_dir_t dir;
__attribute__((unused)) struct lfs_info info;
__attribute__((unused)) char path[1024];
__attribute__((unused)) uint8_t buffer[1024];
__attribute__((unused)) lfs_size_t size;
__attribute__((unused)) int err;
__attribute__((unused)) const struct lfs_config cfg = {
.context = &bd,
.read = lfs_testbd_read,
.prog = lfs_testbd_prog,
.erase = lfs_testbd_erase,
.sync = lfs_testbd_sync,
.read_size = LFS_READ_SIZE,
.prog_size = LFS_PROG_SIZE,
.block_size = LFS_BLOCK_SIZE,
.block_count = LFS_BLOCK_COUNT,
.block_cycles = LFS_BLOCK_CYCLES,
.cache_size = LFS_CACHE_SIZE,
.lookahead_size = LFS_LOOKAHEAD_SIZE,
};
__attribute__((unused)) const struct lfs_testbd_config bdcfg = {
.erase_value = LFS_ERASE_VALUE,
.erase_cycles = LFS_ERASE_CYCLES,
.badblock_behavior = LFS_BADBLOCK_BEHAVIOR,
.power_cycles = lfs_testbd_cycles,
};
lfs_testbd_createcfg(&cfg, lfs_testbd_path, &bdcfg) => 0;
"""
EPILOGUE = """
// epilogue
lfs_testbd_destroy(&cfg) => 0;
"""
PASS = '\033[32m✓\033[0m'
FAIL = '\033[31m✗\033[0m'
class TestFailure(Exception):
def __init__(self, case, returncode=None, stdout=None, assert_=None):
self.case = case
self.returncode = returncode
self.stdout = stdout
self.assert_ = assert_
class TestCase:
def __init__(self, config, filter=filter,
suite=None, caseno=None, lineno=None, **_):
self.config = config
self.filter = filter
self.suite = suite
self.caseno = caseno
self.lineno = lineno
self.code = config['code']
self.code_lineno = config['code_lineno']
self.defines = config.get('define', {})
self.if_ = config.get('if', None)
self.in_ = config.get('in', None)
self.result = None
def __str__(self):
if hasattr(self, 'permno'):
if any(k not in self.case.defines for k in self.defines):
return '%s#%d#%d (%s)' % (
self.suite.name, self.caseno, self.permno, ', '.join(
'%s=%s' % (k, v) for k, v in self.defines.items()
if k not in self.case.defines))
else:
return '%s#%d#%d' % (
self.suite.name, self.caseno, self.permno)
else:
return '%s#%d' % (
self.suite.name, self.caseno)
def permute(self, class_=None, defines={}, permno=None, **_):
ncase = (class_ or type(self))(self.config)
for k, v in self.__dict__.items():
setattr(ncase, k, v)
ncase.case = self
ncase.perms = [ncase]
ncase.permno = permno
ncase.defines = defines
return ncase
def build(self, f, **_):
# prologue
for k, v in sorted(self.defines.items()):
if k not in self.suite.defines:
f.write('#define %s %s\n' % (k, v))
f.write('void test_case%d(%s) {' % (self.caseno, ','.join(
'\n'+8*' '+'__attribute__((unused)) intmax_t %s' % k
for k in sorted(self.perms[0].defines)
if k not in self.defines)))
f.write(PROLOGUE)
f.write('\n')
f.write(4*' '+'// test case %d\n' % self.caseno)
f.write(4*' '+'#line %d "%s"\n' % (self.code_lineno, self.suite.path))
# test case goes here
f.write(self.code)
# epilogue
f.write(EPILOGUE)
f.write('}\n')
for k, v in sorted(self.defines.items()):
if k not in self.suite.defines:
f.write('#undef %s\n' % k)
def shouldtest(self, **args):
if (self.filter is not None and
len(self.filter) >= 1 and
self.filter[0] != self.caseno):
return False
elif (self.filter is not None and
len(self.filter) >= 2 and
self.filter[1] != self.permno):
return False
elif args.get('no_internal') and self.in_ is not None:
return False
elif self.if_ is not None:
if_ = self.if_
while True:
for k, v in sorted(self.defines.items(),
key=lambda x: len(x[0]), reverse=True):
if k in if_:
if_ = if_.replace(k, '(%s)' % v)
break
else:
break
if_ = (
re.sub('(\&\&|\?)', ' and ',
re.sub('(\|\||:)', ' or ',
re.sub('!(?!=)', ' not ', if_))))
return eval(if_)
else:
return True
def test(self, exec=[], persist=False, cycles=None,
gdb=False, failure=None, disk=None, **args):
# build command
cmd = exec + ['./%s.test' % self.suite.path,
repr(self.caseno), repr(self.permno)]
# persist disk or keep in RAM for speed?
if persist:
if not disk:
disk = self.suite.path + '.disk'
if persist != 'noerase':
try:
with open(disk, 'w') as f:
f.truncate(0)
if args.get('verbose'):
print('truncate --size=0', disk)
except FileNotFoundError:
pass
cmd.append(disk)
# simulate power-loss after n cycles?
if cycles:
cmd.append(str(cycles))
# failed? drop into debugger?
if gdb and failure:
ncmd = ['gdb']
if gdb == 'assert':
ncmd.extend(['-ex', 'r'])
if failure.assert_:
ncmd.extend(['-ex', 'up 2'])
elif gdb == 'main':
ncmd.extend([
'-ex', 'b %s:%d' % (self.suite.path, self.code_lineno),
'-ex', 'r'])
ncmd.extend(['--args'] + cmd)
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in ncmd))
signal.signal(signal.SIGINT, signal.SIG_IGN)
sys.exit(sp.call(ncmd))
# run test case!
mpty, spty = pty.openpty()
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd, stdout=spty, stderr=spty)
os.close(spty)
mpty = os.fdopen(mpty, 'r', 1)
stdout = []
assert_ = None
try:
while True:
try:
line = mpty.readline()
except OSError as e:
if e.errno == errno.EIO:
break
raise
if not line:
break;
stdout.append(line)
if args.get('verbose'):
sys.stdout.write(line)
# intercept asserts
m = re.match(
'^{0}([^:]+):(\d+):(?:\d+:)?{0}{1}:{0}(.*)$'
.format('(?:\033\[[\d;]*.| )*', 'assert'),
line)
if m and assert_ is None:
try:
with open(m.group(1)) as f:
lineno = int(m.group(2))
line = (next(it.islice(f, lineno-1, None))
.strip('\n'))
assert_ = {
'path': m.group(1),
'line': line,
'lineno': lineno,
'message': m.group(3)}
except:
pass
except KeyboardInterrupt:
raise TestFailure(self, 1, stdout, None)
proc.wait()
# did we pass?
if proc.returncode != 0:
raise TestFailure(self, proc.returncode, stdout, assert_)
else:
return PASS
class ValgrindTestCase(TestCase):
def __init__(self, config, **args):
self.leaky = config.get('leaky', False)
super().__init__(config, **args)
def shouldtest(self, **args):
return not self.leaky and super().shouldtest(**args)
def test(self, exec=[], **args):
verbose = args.get('verbose')
uninit = (self.defines.get('LFS_ERASE_VALUE', None) == -1)
exec = [
'valgrind',
'--leak-check=full',
] + (['--undef-value-errors=no'] if uninit else []) + [
] + (['--track-origins=yes'] if not uninit else []) + [
'--error-exitcode=4',
'--error-limit=no',
] + (['--num-callers=1'] if not verbose else []) + [
'-q'] + exec
return super().test(exec=exec, **args)
class ReentrantTestCase(TestCase):
def __init__(self, config, **args):
self.reentrant = config.get('reentrant', False)
super().__init__(config, **args)
def shouldtest(self, **args):
return self.reentrant and super().shouldtest(**args)
def test(self, persist=False, gdb=False, failure=None, **args):
for cycles in it.count(1):
# clear disk first?
if cycles == 1 and persist != 'noerase':
persist = 'erase'
else:
persist = 'noerase'
# exact cycle we should drop into debugger?
if gdb and failure and failure.cycleno == cycles:
return super().test(gdb=gdb, persist=persist, cycles=cycles,
failure=failure, **args)
# run tests, but kill the program after prog/erase has
# been hit n cycles. We exit with a special return code if the
# program has not finished, since this isn't a test failure.
try:
return super().test(persist=persist, cycles=cycles, **args)
except TestFailure as nfailure:
if nfailure.returncode == 33:
continue
else:
nfailure.cycleno = cycles
raise
class TestSuite:
def __init__(self, path, classes=[TestCase], defines={},
filter=None, **args):
self.name = os.path.basename(path)
if self.name.endswith('.toml'):
self.name = self.name[:-len('.toml')]
if args.get('build_dir'):
self.toml = path
self.path = args['build_dir'] + '/' + path
else:
self.toml = path
self.path = path
self.classes = classes
self.defines = defines.copy()
self.filter = filter
with open(self.toml) as f:
# load tests
config = toml.load(f)
# find line numbers
f.seek(0)
linenos = []
code_linenos = []
for i, line in enumerate(f):
if re.match(r'\[\[\s*case\s*\]\]', line):
linenos.append(i+1)
if re.match(r'code\s*=\s*(\'\'\'|""")', line):
code_linenos.append(i+2)
code_linenos.reverse()
# grab global config
for k, v in config.get('define', {}).items():
if k not in self.defines:
self.defines[k] = v
self.code = config.get('code', None)
if self.code is not None:
self.code_lineno = code_linenos.pop()
# create initial test cases
self.cases = []
for i, (case, lineno) in enumerate(zip(config['case'], linenos)):
# code lineno?
if 'code' in case:
case['code_lineno'] = code_linenos.pop()
# merge conditions if necessary
if 'if' in config and 'if' in case:
case['if'] = '(%s) && (%s)' % (config['if'], case['if'])
elif 'if' in config:
case['if'] = config['if']
# initialize test case
self.cases.append(TestCase(case, filter=filter,
suite=self, caseno=i+1, lineno=lineno, **args))
def __str__(self):
return self.name
def __lt__(self, other):
return self.name < other.name
def permute(self, **args):
for case in self.cases:
# lets find all parameterized definitions, in one of [args.D,
# suite.defines, case.defines, DEFINES]. Note that each of these
# can be either a dict of defines, or a list of dicts, expressing
# an initial set of permutations.
pending = [{}]
for inits in [self.defines, case.defines, DEFINES]:
if not isinstance(inits, list):
inits = [inits]
npending = []
for init, pinit in it.product(inits, pending):
ninit = pinit.copy()
for k, v in init.items():
if k not in ninit:
try:
ninit[k] = eval(v)
except:
ninit[k] = v
npending.append(ninit)
pending = npending
# expand permutations
pending = list(reversed(pending))
expanded = []
while pending:
perm = pending.pop()
for k, v in sorted(perm.items()):
if not isinstance(v, str) and isinstance(v, abc.Iterable):
for nv in reversed(v):
nperm = perm.copy()
nperm[k] = nv
pending.append(nperm)
break
else:
expanded.append(perm)
# generate permutations
case.perms = []
for i, (class_, defines) in enumerate(
it.product(self.classes, expanded)):
case.perms.append(case.permute(
class_, defines, permno=i+1, **args))
# also track non-unique defines
case.defines = {}
for k, v in case.perms[0].defines.items():
if all(perm.defines[k] == v for perm in case.perms):
case.defines[k] = v
# track all perms and non-unique defines
self.perms = []
for case in self.cases:
self.perms.extend(case.perms)
self.defines = {}
for k, v in self.perms[0].defines.items():
if all(perm.defines.get(k, None) == v for perm in self.perms):
self.defines[k] = v
return self.perms
def build(self, **args):
# build test files
tf = open(self.path + '.test.tc', 'w')
tf.write(GLOBALS)
if self.code is not None:
tf.write('#line %d "%s"\n' % (self.code_lineno, self.path))
tf.write(self.code)
tfs = {None: tf}
for case in self.cases:
if case.in_ not in tfs:
tfs[case.in_] = open(self.path+'.'+
re.sub('(\.c)?$', '.tc', case.in_.replace('/', '.')), 'w')
tfs[case.in_].write('#line 1 "%s"\n' % case.in_)
with open(case.in_) as f:
for line in f:
tfs[case.in_].write(line)
tfs[case.in_].write('\n')
tfs[case.in_].write(GLOBALS)
tfs[case.in_].write('\n')
case.build(tfs[case.in_], **args)
tf.write('\n')
tf.write('const char *lfs_testbd_path;\n')
tf.write('uint32_t lfs_testbd_cycles;\n')
tf.write('int main(int argc, char **argv) {\n')
tf.write(4*' '+'int case_ = (argc > 1) ? atoi(argv[1]) : 0;\n')
tf.write(4*' '+'int perm = (argc > 2) ? atoi(argv[2]) : 0;\n')
tf.write(4*' '+'lfs_testbd_path = (argc > 3) ? argv[3] : NULL;\n')
tf.write(4*' '+'lfs_testbd_cycles = (argc > 4) ? atoi(argv[4]) : 0;\n')
for perm in self.perms:
# test declaration
tf.write(4*' '+'extern void test_case%d(%s);\n' % (
perm.caseno, ', '.join(
'intmax_t %s' % k for k in sorted(perm.defines)
if k not in perm.case.defines)))
# test call
tf.write(4*' '+
'if (argc < 3 || (case_ == %d && perm == %d)) {'
' test_case%d(%s); '
'}\n' % (perm.caseno, perm.permno, perm.caseno, ', '.join(
str(v) for k, v in sorted(perm.defines.items())
if k not in perm.case.defines)))
tf.write('}\n')
for tf in tfs.values():
tf.close()
# write makefiles
with open(self.path + '.mk', 'w') as mk:
mk.write(RULES.replace(4*' ', '\t') % dict(path=self.path))
mk.write('\n')
# add coverage hooks?
if args.get('coverage'):
mk.write(COVERAGE_RULES.replace(4*' ', '\t') % dict(
path=self.path))
mk.write('\n')
# add truely global defines globally
for k, v in sorted(self.defines.items()):
mk.write('%s.test: override CFLAGS += -D%s=%r\n'
% (self.path, k, v))
for path in tfs:
if path is None:
mk.write('%s: %s | %s\n' % (
self.path+'.test.c',
self.toml,
self.path+'.test.tc'))
else:
mk.write('%s: %s %s | %s\n' % (
self.path+'.'+path.replace('/', '.'),
self.toml,
path,
self.path+'.'+re.sub('(\.c)?$', '.tc',
path.replace('/', '.'))))
mk.write('\t./scripts/explode_asserts.py $| -o $@\n')
self.makefile = self.path + '.mk'
self.target = self.path + '.test'
return self.makefile, self.target
def test(self, **args):
# run test suite!
if not args.get('verbose', True):
sys.stdout.write(self.name + ' ')
sys.stdout.flush()
for perm in self.perms:
if not perm.shouldtest(**args):
continue
try:
result = perm.test(**args)
except TestFailure as failure:
perm.result = failure
if not args.get('verbose', True):
sys.stdout.write(FAIL)
sys.stdout.flush()
if not args.get('keep_going'):
if not args.get('verbose', True):
sys.stdout.write('\n')
raise
else:
perm.result = PASS
if not args.get('verbose', True):
sys.stdout.write(PASS)
sys.stdout.flush()
if not args.get('verbose', True):
sys.stdout.write('\n')
def main(**args):
# figure out explicit defines
defines = {}
for define in args['D']:
k, v, *_ = define.split('=', 2) + ['']
defines[k] = v
# and what class of TestCase to run
classes = []
if args.get('normal'):
classes.append(TestCase)
if args.get('reentrant'):
classes.append(ReentrantTestCase)
if args.get('valgrind'):
classes.append(ValgrindTestCase)
if not classes:
classes = [TestCase]
suites = []
for testpath in args['test_paths']:
# optionally specified test case/perm
testpath, *filter = testpath.split('#')
filter = [int(f) for f in filter]
# figure out the suite's toml file
if os.path.isdir(testpath):
testpath = testpath + '/*.toml'
elif os.path.isfile(testpath):
testpath = testpath
elif testpath.endswith('.toml'):
testpath = TEST_PATHS + '/' + testpath
else:
testpath = TEST_PATHS + '/' + testpath + '.toml'
# find tests
for path in glob.glob(testpath):
suites.append(TestSuite(path, classes, defines, filter, **args))
# sort for reproducability
suites = sorted(suites)
# generate permutations
for suite in suites:
suite.permute(**args)
# build tests in parallel
print('====== building ======')
makefiles = []
targets = []
for suite in suites:
makefile, target = suite.build(**args)
makefiles.append(makefile)
targets.append(target)
cmd = (['make', '-f', 'Makefile'] +
list(it.chain.from_iterable(['-f', m] for m in makefiles)) +
[target for target in targets])
mpty, spty = pty.openpty()
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd, stdout=spty, stderr=spty)
os.close(spty)
mpty = os.fdopen(mpty, 'r', 1)
stdout = []
while True:
try:
line = mpty.readline()
except OSError as e:
if e.errno == errno.EIO:
break
raise
if not line:
break;
stdout.append(line)
if args.get('verbose'):
sys.stdout.write(line)
# intercept warnings
m = re.match(
'^{0}([^:]+):(\d+):(?:\d+:)?{0}{1}:{0}(.*)$'
.format('(?:\033\[[\d;]*.| )*', 'warning'),
line)
if m and not args.get('verbose'):
try:
with open(m.group(1)) as f:
lineno = int(m.group(2))
line = next(it.islice(f, lineno-1, None)).strip('\n')
sys.stdout.write(
"\033[01m{path}:{lineno}:\033[01;35mwarning:\033[m "
"{message}\n{line}\n\n".format(
path=m.group(1), line=line, lineno=lineno,
message=m.group(3)))
except:
pass
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in stdout:
sys.stdout.write(line)
sys.exit(-1)
print('built %d test suites, %d test cases, %d permutations' % (
len(suites),
sum(len(suite.cases) for suite in suites),
sum(len(suite.perms) for suite in suites)))
total = 0
for suite in suites:
for perm in suite.perms:
total += perm.shouldtest(**args)
if total != sum(len(suite.perms) for suite in suites):
print('filtered down to %d permutations' % total)
# only requested to build?
if args.get('build'):
return 0
print('====== testing ======')
try:
for suite in suites:
suite.test(**args)
except TestFailure:
pass
print('====== results ======')
passed = 0
failed = 0
for suite in suites:
for perm in suite.perms:
if perm.result == PASS:
passed += 1
elif isinstance(perm.result, TestFailure):
sys.stdout.write(
"\033[01m{path}:{lineno}:\033[01;31mfailure:\033[m "
"{perm} failed\n".format(
perm=perm, path=perm.suite.path, lineno=perm.lineno,
returncode=perm.result.returncode or 0))
if perm.result.stdout:
if perm.result.assert_:
stdout = perm.result.stdout[:-1]
else:
stdout = perm.result.stdout
for line in stdout[-5:]:
sys.stdout.write(line)
if perm.result.assert_:
sys.stdout.write(
"\033[01m{path}:{lineno}:\033[01;31massert:\033[m "
"{message}\n{line}\n".format(
**perm.result.assert_))
sys.stdout.write('\n')
failed += 1
if args.get('coverage'):
# collect coverage info
# why -j1? lcov doesn't work in parallel because of gcov limitations
cmd = (['make', '-j1', '-f', 'Makefile'] +
list(it.chain.from_iterable(['-f', m] for m in makefiles)) +
(['COVERAGETARGET=%s' % args['coverage']]
if isinstance(args['coverage'], str) else []) +
[suite.path + '.info' for suite in suites
if any(perm.result == PASS for perm in suite.perms)])
if args.get('verbose'):
print(' '.join(shlex.quote(c) for c in cmd))
proc = sp.Popen(cmd,
stdout=sp.PIPE if not args.get('verbose') else None,
stderr=sp.STDOUT if not args.get('verbose') else None,
universal_newlines=True)
proc.wait()
if proc.returncode != 0:
if not args.get('verbose'):
for line in proc.stdout:
sys.stdout.write(line)
sys.exit(-1)
if args.get('gdb'):
failure = None
for suite in suites:
for perm in suite.perms:
if isinstance(perm.result, TestFailure):
failure = perm.result
if failure is not None:
print('======= gdb ======')
# drop into gdb
failure.case.test(failure=failure, **args)
sys.exit(0)
print('tests passed %d/%d (%.2f%%)' % (passed, total,
100*(passed/total if total else 1.0)))
print('tests failed %d/%d (%.2f%%)' % (failed, total,
100*(failed/total if total else 1.0)))
return 1 if failed > 0 else 0
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(
description="Run parameterized tests in various configurations.")
parser.add_argument('test_paths', nargs='*', default=[TEST_PATHS],
help="Description of test(s) to run. By default, this is all tests \
found in the \"{0}\" directory. Here, you can specify a different \
directory of tests, a specific file, a suite by name, and even \
specific test cases and permutations. For example \
\"test_dirs#1\" or \"{0}/test_dirs.toml#1#1\".".format(TEST_PATHS))
parser.add_argument('-D', action='append', default=[],
help="Overriding parameter definitions.")
parser.add_argument('-v', '--verbose', action='store_true',
help="Output everything that is happening.")
parser.add_argument('-k', '--keep-going', action='store_true',
help="Run all tests instead of stopping on first error. Useful for CI.")
parser.add_argument('-p', '--persist', choices=['erase', 'noerase'],
nargs='?', const='erase',
help="Store disk image in a file.")
parser.add_argument('-b', '--build', action='store_true',
help="Only build the tests, do not execute.")
parser.add_argument('-g', '--gdb', choices=['init', 'main', 'assert'],
nargs='?', const='assert',
help="Drop into gdb on test failure.")
parser.add_argument('--no-internal', action='store_true',
help="Don't run tests that require internal knowledge.")
parser.add_argument('-n', '--normal', action='store_true',
help="Run tests normally.")
parser.add_argument('-r', '--reentrant', action='store_true',
help="Run reentrant tests with simulated power-loss.")
parser.add_argument('--valgrind', action='store_true',
help="Run non-leaky tests under valgrind to check for memory leaks.")
parser.add_argument('--exec', default=[], type=lambda e: e.split(),
help="Run tests with another executable prefixed on the command line.")
parser.add_argument('--disk',
help="Specify a file to use for persistent/reentrant tests.")
parser.add_argument('--coverage', type=lambda x: x if x else True,
nargs='?', const='',
help="Collect coverage information during testing. This uses lcov/gcov \
to accumulate coverage information into *.info files. May also \
a path to a *.info file to accumulate coverage info into.")
parser.add_argument('--build-dir',
help="Build relative to the specified directory instead of the \
current directory.")
sys.exit(main(**vars(parser.parse_args())))
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