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# test___main__.py -- tests for __main__.py
# Copyright (C) 2025 Jelmer Vernooij <jelmer@jelmer.uk>
#
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
# Dulwich is dual-licensed under the Apache License, Version 2.0 and the GNU
# General Public License as published by the Free Software Foundation; version 2.0
# or (at your option) any later version. You can redistribute it and/or
# modify it under the terms of either of these two licenses.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# You should have received a copy of the licenses; if not, see
# <http://www.gnu.org/licenses/> for a copy of the GNU General Public License
# and <http://www.apache.org/licenses/LICENSE-2.0> for a copy of the Apache
# License, Version 2.0.
#
"""Tests for __main__.py module entry point."""
import subprocess
import sys
from . import TestCase
class MainModuleTests(TestCase):
"""Tests for the __main__.py module entry point."""
def test_main_module_help_flag(self) -> None:
"""Test that running dulwich as a module with --help works."""
# Run dulwich as a module using python -m
result = subprocess.run(
[sys.executable, "-m", "dulwich", "--help"],
capture_output=True,
text=True,
)
# Help command exits with code 1 (standard behavior when no command is given)
self.assertEqual(1, result.returncode)
# Should start with usage line
self.assertTrue(result.stdout.startswith("usage: dulwich"))
def test_main_module_help_command(self) -> None:
"""Test that running dulwich as a module with help command works."""
result = subprocess.run(
[sys.executable, "-m", "dulwich", "help"],
capture_output=True,
text=True,
)
# Help command should succeed
self.assertEqual(0, result.returncode)
# Check exact output (help goes to stderr)
expected = (
"The dulwich command line tool is currently a very basic frontend for the\n"
"Dulwich python module. For full functionality, please see the API reference.\n"
"\n"
"For a list of supported commands, see 'dulwich help -a'.\n"
)
self.assertEqual(expected, result.stderr)
def test_main_module_no_args(self) -> None:
"""Test that running dulwich as a module with no arguments shows help."""
result = subprocess.run(
[sys.executable, "-m", "dulwich"],
capture_output=True,
text=True,
)
# No arguments should show help and exit with code 1
self.assertEqual(1, result.returncode)
# Should start with usage line
self.assertTrue(result.stdout.startswith("usage: dulwich"))
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