97 lines
3.6 KiB
Python
97 lines
3.6 KiB
Python
"""Sanity checks for command-line options."""
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import re
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from subprocess import PIPE
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from subprocess import Popen
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import pytest
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@pytest.fixture
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def current_version():
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return open('VERSION').read().strip()
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def test_no_arguments_prints_usage(both_debug_modes, both_setsid_modes):
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proc = Popen(('dumb-init'), stderr=PIPE)
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_, stderr = proc.communicate()
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assert proc.returncode != 0
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assert stderr == (
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b'Usage: dumb-init [option] program [args]\n'
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b'Try dumb-init --help for full usage.\n'
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)
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@pytest.mark.parametrize('flag', ['-h', '--help'])
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def test_help_message(flag, both_debug_modes, both_setsid_modes, current_version):
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"""dumb-init should say something useful when called with the help flag,
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and exit zero.
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"""
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proc = Popen(('dumb-init', flag), stderr=PIPE)
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_, stderr = proc.communicate()
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assert proc.returncode == 0
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assert stderr == (
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b'dumb-init v' + current_version.encode('ascii') + b'\n'
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b'Usage: dumb-init [option] command [[arg] ...]\n'
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b'\n'
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b'dumb-init is a simple process supervisor that forwards signals to children.\n'
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b'It is designed to run as PID1 in minimal container environments.\n'
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b'\n'
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b'Optional arguments:\n'
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b' -c, --single-child Run in single-child mode.\n'
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b' In this mode, signals are only proxies to the\n'
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b' direct child and not any of its descendants.\n'
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b' -v, --verbose Print debugging information to stderr.\n'
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b' -h, --help Print this help message and exit.\n'
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b' -V, --version Print the current version and exit.\n'
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b'\n'
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b'Full help is available online at https://github.com/Yelp/dumb-init\n'
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)
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@pytest.mark.parametrize('flag', ['-V', '--version'])
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def test_version_message(flag, both_debug_modes, both_setsid_modes, current_version):
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"""dumb-init should print its version when asked to."""
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proc = Popen(('dumb-init', flag), stderr=PIPE)
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_, stderr = proc.communicate()
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assert proc.returncode == 0
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assert stderr == b'dumb-init v' + current_version.encode('ascii') + b'\n'
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@pytest.mark.parametrize('flag', ['-v', '--verbose'])
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def test_verbose(flag):
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"""dumb-init should print debug output when asked to."""
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proc = Popen(('dumb-init', flag, 'echo', 'oh,', 'hi'), stdout=PIPE, stderr=PIPE)
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stdout, stderr = proc.communicate()
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assert proc.returncode == 0
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assert stdout == b'oh, hi\n'
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assert re.match(
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(
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b'^\[dumb-init\] Child spawned with PID [0-9]+\.\n'
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b'\[dumb-init\] setsid complete\.\n'
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b'\[dumb-init\] A child with PID [0-9]+ exited with exit status 0.\n'
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b'\[dumb-init\] Forwarded signal 15 to children\.\n'
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b'\[dumb-init\] Child exited with status 0\. Goodbye\.\n$'
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),
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stderr,
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)
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@pytest.mark.parametrize('flag1', ['-v', '--verbose'])
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@pytest.mark.parametrize('flag2', ['-c', '--single-child'])
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def test_verbose_and_single_child(flag1, flag2):
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"""dumb-init should print debug output when asked to."""
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proc = Popen(('dumb-init', flag1, flag2, 'echo', 'oh,', 'hi'), stdout=PIPE, stderr=PIPE)
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stdout, stderr = proc.communicate()
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assert proc.returncode == 0
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assert stdout == b'oh, hi\n'
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assert re.match(
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(
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b'^\[dumb-init\] Child spawned with PID [0-9]+\.\n'
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b'\[dumb-init\] A child with PID [0-9]+ exited with exit status 0.\n'
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b'\[dumb-init\] Forwarded signal 15 to children\.\n'
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b'\[dumb-init\] Child exited with status 0\. Goodbye\.\n$'
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),
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stderr,
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)
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