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# test_bisect.py -- Tests for bisect functionality
# 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 bisect functionality."""
import os
import shutil
import tempfile
from dulwich.bisect import BisectState
from dulwich.repo import Repo
from dulwich.tests.utils import make_commit
from . import TestCase
class BisectStateTests(TestCase):
"""Tests for BisectState class."""
def setUp(self) -> None:
self.test_dir = tempfile.mkdtemp()
self.repo = Repo.init(self.test_dir)
def tearDown(self) -> None:
shutil.rmtree(self.test_dir)
def test_is_active_false(self) -> None:
"""Test is_active when no bisect session is active."""
state = BisectState(self.repo)
self.assertFalse(state.is_active)
def test_start_bisect(self) -> None:
"""Test starting a bisect session."""
# Create at least one commit so HEAD exists
c1 = make_commit(id=b"1" * 40, message=b"initial commit")
self.repo.object_store.add_object(c1)
self.repo.refs[b"HEAD"] = c1.id
self.repo.refs[b"refs/heads/main"] = c1.id
state = BisectState(self.repo)
state.start()
self.assertTrue(state.is_active)
self.assertTrue(
os.path.exists(os.path.join(self.repo.controldir(), "BISECT_START"))
)
self.assertTrue(
os.path.exists(os.path.join(self.repo.controldir(), "BISECT_TERMS"))
)
self.assertTrue(
os.path.exists(os.path.join(self.repo.controldir(), "BISECT_NAMES"))
)
self.assertTrue(
os.path.exists(os.path.join(self.repo.controldir(), "BISECT_LOG"))
)
def test_start_bisect_no_head(self) -> None:
"""Test starting a bisect session when repository has no HEAD."""
state = BisectState(self.repo)
with self.assertRaises(ValueError) as cm:
state.start()
self.assertIn("Cannot start bisect: repository has no HEAD", str(cm.exception))
def test_start_bisect_already_active(self) -> None:
"""Test starting a bisect session when one is already active."""
# Create at least one commit so HEAD exists
c1 = make_commit(id=b"1" * 40, message=b"initial commit")
self.repo.object_store.add_object(c1)
self.repo.refs[b"HEAD"] = c1.id
state = BisectState(self.repo)
state.start()
with self.assertRaises(ValueError):
state.start()
def test_mark_bad_no_session(self) -> None:
"""Test marking bad commit when no session is active."""
state = BisectState(self.repo)
with self.assertRaises(ValueError):
state.mark_bad()
def test_mark_good_no_session(self) -> None:
"""Test marking good commit when no session is active."""
state = BisectState(self.repo)
with self.assertRaises(ValueError):
state.mark_good()
def test_reset_no_session(self) -> None:
"""Test resetting when no session is active."""
state = BisectState(self.repo)
with self.assertRaises(ValueError):
state.reset()
def test_bisect_workflow(self) -> None:
"""Test a complete bisect workflow."""
# Create some commits
c1 = make_commit(id=b"1" * 40, message=b"good commit 1")
c2 = make_commit(id=b"2" * 40, message=b"good commit 2", parents=[b"1" * 40])
c3 = make_commit(id=b"3" * 40, message=b"bad commit", parents=[b"2" * 40])
c4 = make_commit(id=b"4" * 40, message=b"bad commit 2", parents=[b"3" * 40])
# Add commits to object store
for commit in [c1, c2, c3, c4]:
self.repo.object_store.add_object(commit)
# Set HEAD to latest commit
self.repo.refs[b"HEAD"] = c4.id
# Start bisect
state = BisectState(self.repo)
state.start()
# Mark bad and good
state.mark_bad(c4.id)
state.mark_good(c1.id)
# Check that refs were created
self.assertTrue(
os.path.exists(
os.path.join(self.repo.controldir(), "refs", "bisect", "bad")
)
)
self.assertTrue(
os.path.exists(
os.path.join(
self.repo.controldir(),
"refs",
"bisect",
f"good-{c1.id.decode('ascii')}",
)
)
)
# Reset
state.reset()
self.assertFalse(state.is_active)
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