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import sys
import re
from joblib.testing import raises, check_subprocess_call
def test_check_subprocess_call():
code = '\n'.join(['result = 1 + 2 * 3',
'print(result)',
'my_list = [1, 2, 3]',
'print(my_list)'])
check_subprocess_call([sys.executable, '-c', code])
# Now checking stdout with a regex
check_subprocess_call([sys.executable, '-c', code],
# Regex needed for platform-specific line endings
stdout_regex=r'7\s{1,2}\[1, 2, 3\]')
def test_check_subprocess_call_non_matching_regex():
code = '42'
non_matching_pattern = '_no_way_this_matches_anything_'
with raises(ValueError) as excinfo:
check_subprocess_call([sys.executable, '-c', code],
stdout_regex=non_matching_pattern)
excinfo.match('Unexpected stdout.+{}'.format(non_matching_pattern))
def test_check_subprocess_call_wrong_command():
wrong_command = '_a_command_that_does_not_exist_'
with raises(OSError):
check_subprocess_call([wrong_command])
def test_check_subprocess_call_non_zero_return_code():
code_with_non_zero_exit = '\n'.join([
'import sys',
'print("writing on stdout")',
'sys.stderr.write("writing on stderr")',
'sys.exit(123)'])
pattern = re.compile('Non-zero return code: 123.+'
'Stdout:\nwriting on stdout.+'
'Stderr:\nwriting on stderr', re.DOTALL)
with raises(ValueError) as excinfo:
check_subprocess_call([sys.executable, '-c', code_with_non_zero_exit])
excinfo.match(pattern)
def test_check_subprocess_call_timeout():
code_timing_out = '\n'.join([
'import time',
'import sys',
'print("before sleep on stdout")',
'sys.stdout.flush()',
'sys.stderr.write("before sleep on stderr")',
'sys.stderr.flush()',
# We need to sleep for at least 2 * timeout seconds in case the SIGKILL
# is triggered.
'time.sleep(10)',
'print("process should have be killed before")',
'sys.stdout.flush()'])
pattern = re.compile('Non-zero return code:.+'
'Stdout:\nbefore sleep on stdout\\s+'
'Stderr:\nbefore sleep on stderr',
re.DOTALL)
with raises(ValueError) as excinfo:
check_subprocess_call([sys.executable, '-c', code_timing_out],
timeout=1)
excinfo.match(pattern)
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