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# Copyright (C) 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Tests that branch classes implement hook callouts correctly."""
from bzrlib.branch import Branch, ChangeBranchTipParams
from bzrlib.errors import HookFailed, TipChangeRejected
from bzrlib.remote import RemoteBranch
from bzrlib.revision import NULL_REVISION
from bzrlib.smart import server
from bzrlib.tests import TestCaseWithMemoryTransport
class ChangeBranchTipTestCase(TestCaseWithMemoryTransport):
"""Base TestCase for testing pre/post_change_branch_tip hooks."""
def install_logging_hook(self, prefix):
"""Add a hook that logs calls made to it.
:returns: the list that the calls will be appended to.
"""
hook_calls = []
Branch.hooks.install_named_hook(
prefix + '_change_branch_tip', hook_calls.append, None)
return hook_calls
def make_branch_with_revision_ids(self, *revision_ids):
"""Makes a branch with the given commits."""
tree = self.make_branch_and_memory_tree('source')
tree.lock_write()
tree.add('')
for revision_id in revision_ids:
tree.commit(u'Message of ' + revision_id.decode('utf8'),
rev_id=revision_id)
tree.unlock()
branch = tree.branch
return branch
def assertHookCalls(self, expected_params, branch, hook_calls=None,
pre=False):
if hook_calls is None:
hook_calls = self.hook_calls
if isinstance(branch, RemoteBranch):
# For a remote branch, both the server and the client will raise
# this hook, and we see both in the test environment. The remote
# instance comes in between the clients - the client doe pre, the
# server does pre, the server does post, the client does post.
if pre:
offset = 0
else:
offset = 1
self.assertEqual(expected_params, hook_calls[offset])
self.assertEqual(2, len(hook_calls))
else:
self.assertEqual([expected_params], hook_calls)
class TestSetRevisionHistoryHook(ChangeBranchTipTestCase):
def setUp(self):
self.hook_calls = []
TestCaseWithMemoryTransport.setUp(self)
def capture_set_rh_hook(self, branch, rev_history):
"""Capture post set-rh hook calls to self.hook_calls.
The call is logged, as is some state of the branch.
"""
self.hook_calls.append(
('set_rh', branch, rev_history, branch.is_locked()))
def test_set_rh_empty_history(self):
branch = self.make_branch('source')
Branch.hooks.install_named_hook('set_rh', self.capture_set_rh_hook,
None)
branch.set_revision_history([])
expected_params = ('set_rh', branch, [], True)
self.assertHookCalls(expected_params, branch)
def test_set_rh_nonempty_history(self):
tree = self.make_branch_and_memory_tree('source')
tree.lock_write()
tree.add('')
tree.commit('another commit', rev_id='f\xc2\xb5')
tree.commit('empty commit', rev_id='foo')
tree.unlock()
branch = tree.branch
Branch.hooks.install_named_hook('set_rh', self.capture_set_rh_hook,
None)
# some branches require that their history be set to a revision in the
# repository
branch.set_revision_history(['f\xc2\xb5'])
expected_params =('set_rh', branch, ['f\xc2\xb5'], True)
self.assertHookCalls(expected_params, branch)
def test_set_rh_branch_is_locked(self):
branch = self.make_branch('source')
Branch.hooks.install_named_hook('set_rh', self.capture_set_rh_hook,
None)
branch.set_revision_history([])
expected_params = ('set_rh', branch, [], True)
self.assertHookCalls(expected_params, branch)
def test_set_rh_calls_all_hooks_no_errors(self):
branch = self.make_branch('source')
Branch.hooks.install_named_hook('set_rh', self.capture_set_rh_hook,
None)
Branch.hooks.install_named_hook('set_rh', self.capture_set_rh_hook,
None)
branch.set_revision_history([])
expected_calls = [('set_rh', branch, [], True),
('set_rh', branch, [], True),
]
if isinstance(branch, RemoteBranch):
# For a remote branch, both the server and the client will raise
# set_rh, and the server will do so first because that is where
# the change takes place.
self.assertEqual(expected_calls, self.hook_calls[2:])
self.assertEqual(4, len(self.hook_calls))
else:
self.assertEqual(expected_calls, self.hook_calls)
class TestOpen(TestCaseWithMemoryTransport):
def capture_hook(self, branch):
self.hook_calls.append(branch)
def install_hook(self):
self.hook_calls = []
Branch.hooks.install_named_hook('open', self.capture_hook, None)
def test_create(self):
self.install_hook()
b = self.make_branch('.')
if isinstance(b, RemoteBranch):
# RemoteBranch creation:
if (self.transport_readonly_server ==
server.ReadonlySmartTCPServer_for_testing_v2_only):
# Older servers:
self.assertEqual(3, len(self.hook_calls))
# creates the branch via the VFS (for older servers)
self.assertEqual(b._real_branch, self.hook_calls[0])
# creates a RemoteBranch object
self.assertEqual(b, self.hook_calls[1])
# get_stacked_on_url RPC
self.assertRealBranch(self.hook_calls[2])
else:
self.assertEqual(2, len(self.hook_calls))
# create_branch RPC
self.assertRealBranch(self.hook_calls[0])
# create RemoteBranch locally
self.assertEqual(b, self.hook_calls[1])
else:
self.assertEqual([b], self.hook_calls)
def test_open(self):
branch_url = self.make_branch('.').bzrdir.root_transport.base
self.install_hook()
b = Branch.open(branch_url)
if isinstance(b, RemoteBranch):
self.assertEqual(3, len(self.hook_calls))
# open_branchV2 RPC
self.assertRealBranch(self.hook_calls[0])
# create RemoteBranch locally
self.assertEqual(b, self.hook_calls[1])
# get_stacked_on_url RPC
self.assertRealBranch(self.hook_calls[2])
else:
self.assertEqual([b], self.hook_calls)
def assertRealBranch(self, b):
# Branches opened on the server don't have comparable URLs, so we just
# assert that it is not a RemoteBranch.
self.assertIsInstance(b, Branch)
self.assertFalse(isinstance(b, RemoteBranch))
class TestPreChangeBranchTip(ChangeBranchTipTestCase):
"""Tests for pre_change_branch_tip hook.
Most of these tests are very similar to the tests in
TestPostChangeBranchTip.
"""
def test_hook_runs_before_change(self):
"""The hook runs *before* the branch's last_revision_info has changed.
"""
branch = self.make_branch_with_revision_ids('revid-one')
def assertBranchAtRevision1(params):
self.assertEquals(
(1, 'revid-one'), params.branch.last_revision_info())
Branch.hooks.install_named_hook(
'pre_change_branch_tip', assertBranchAtRevision1, None)
branch.set_last_revision_info(0, NULL_REVISION)
def test_hook_failure_prevents_change(self):
"""If a hook raises an exception, the change does not take effect."""
branch = self.make_branch_with_revision_ids(
'one-\xc2\xb5', 'two-\xc2\xb5')
class PearShapedError(Exception):
pass
def hook_that_raises(params):
raise PearShapedError()
Branch.hooks.install_named_hook(
'pre_change_branch_tip', hook_that_raises, None)
hook_failed_exc = self.assertRaises(
PearShapedError, branch.set_last_revision_info, 0, NULL_REVISION)
# The revision info is unchanged.
self.assertEqual((2, 'two-\xc2\xb5'), branch.last_revision_info())
def test_empty_history(self):
branch = self.make_branch('source')
hook_calls = self.install_logging_hook('pre')
branch.set_last_revision_info(0, NULL_REVISION)
expected_params = ChangeBranchTipParams(
branch, 0, 0, NULL_REVISION, NULL_REVISION)
self.assertHookCalls(expected_params, branch, hook_calls, pre=True)
def test_nonempty_history(self):
# some branches require that their history be set to a revision in the
# repository, so we need to make a branch with non-empty history for
# this test.
branch = self.make_branch_with_revision_ids(
'one-\xc2\xb5', 'two-\xc2\xb5')
hook_calls = self.install_logging_hook('pre')
branch.set_last_revision_info(1, 'one-\xc2\xb5')
expected_params = ChangeBranchTipParams(
branch, 2, 1, 'two-\xc2\xb5', 'one-\xc2\xb5')
self.assertHookCalls(expected_params, branch, hook_calls, pre=True)
def test_branch_is_locked(self):
branch = self.make_branch('source')
def assertBranchIsLocked(params):
self.assertTrue(params.branch.is_locked())
Branch.hooks.install_named_hook(
'pre_change_branch_tip', assertBranchIsLocked, None)
branch.set_last_revision_info(0, NULL_REVISION)
def test_calls_all_hooks_no_errors(self):
"""If multiple hooks are registered, all are called (if none raise
errors).
"""
branch = self.make_branch('source')
hook_calls_1 = self.install_logging_hook('pre')
hook_calls_2 = self.install_logging_hook('pre')
self.assertIsNot(hook_calls_1, hook_calls_2)
branch.set_last_revision_info(0, NULL_REVISION)
# Both hooks are called.
if isinstance(branch, RemoteBranch):
count = 2
else:
count = 1
self.assertEqual(len(hook_calls_1), count)
self.assertEqual(len(hook_calls_2), count)
def test_explicit_reject_by_hook(self):
"""If a hook raises TipChangeRejected, the change does not take effect.
TipChangeRejected exceptions are propagated, not wrapped in HookFailed.
"""
branch = self.make_branch_with_revision_ids(
'one-\xc2\xb5', 'two-\xc2\xb5')
def hook_that_rejects(params):
raise TipChangeRejected('rejection message')
Branch.hooks.install_named_hook(
'pre_change_branch_tip', hook_that_rejects, None)
self.assertRaises(
TipChangeRejected, branch.set_last_revision_info, 0, NULL_REVISION)
# The revision info is unchanged.
self.assertEqual((2, 'two-\xc2\xb5'), branch.last_revision_info())
class TestPostChangeBranchTip(ChangeBranchTipTestCase):
"""Tests for post_change_branch_tip hook.
Most of these tests are very similar to the tests in
TestPostChangeBranchTip.
"""
def test_hook_runs_after_change(self):
"""The hook runs *after* the branch's last_revision_info has changed.
"""
branch = self.make_branch_with_revision_ids('revid-one')
def assertBranchAtRevision1(params):
self.assertEquals(
(0, NULL_REVISION), params.branch.last_revision_info())
Branch.hooks.install_named_hook(
'post_change_branch_tip', assertBranchAtRevision1, None)
branch.set_last_revision_info(0, NULL_REVISION)
def test_empty_history(self):
branch = self.make_branch('source')
hook_calls = self.install_logging_hook('post')
branch.set_last_revision_info(0, NULL_REVISION)
expected_params = ChangeBranchTipParams(
branch, 0, 0, NULL_REVISION, NULL_REVISION)
self.assertHookCalls(expected_params, branch, hook_calls)
def test_nonempty_history(self):
# some branches require that their history be set to a revision in the
# repository, so we need to make a branch with non-empty history for
# this test.
branch = self.make_branch_with_revision_ids(
'one-\xc2\xb5', 'two-\xc2\xb5')
hook_calls = self.install_logging_hook('post')
branch.set_last_revision_info(1, 'one-\xc2\xb5')
expected_params = ChangeBranchTipParams(
branch, 2, 1, 'two-\xc2\xb5', 'one-\xc2\xb5')
self.assertHookCalls(expected_params, branch, hook_calls)
def test_branch_is_locked(self):
"""The branch passed to the hook is locked."""
branch = self.make_branch('source')
def assertBranchIsLocked(params):
self.assertTrue(params.branch.is_locked())
Branch.hooks.install_named_hook(
'post_change_branch_tip', assertBranchIsLocked, None)
branch.set_last_revision_info(0, NULL_REVISION)
def test_calls_all_hooks_no_errors(self):
"""If multiple hooks are registered, all are called (if none raise
errors).
"""
branch = self.make_branch('source')
hook_calls_1 = self.install_logging_hook('post')
hook_calls_2 = self.install_logging_hook('post')
self.assertIsNot(hook_calls_1, hook_calls_2)
branch.set_last_revision_info(0, NULL_REVISION)
# Both hooks are called.
if isinstance(branch, RemoteBranch):
count = 2
else:
count = 1
self.assertEqual(len(hook_calls_1), count)
self.assertEqual(len(hook_calls_2), count)
class TestAllMethodsThatChangeTipWillRunHooks(ChangeBranchTipTestCase):
"""Every method of Branch that changes a branch tip will invoke the
pre/post_change_branch_tip hooks.
"""
def setUp(self):
ChangeBranchTipTestCase.setUp(self)
self.installPreAndPostHooks()
def installPreAndPostHooks(self):
self.pre_hook_calls = self.install_logging_hook('pre')
self.post_hook_calls = self.install_logging_hook('post')
def resetHookCalls(self):
del self.pre_hook_calls[:], self.post_hook_calls[:]
def assertPreAndPostHooksWereInvoked(self, branch, smart_enabled):
"""assert that both pre and post hooks were called
:param smart_enabled: The method invoked is one that should be
smart server ready.
"""
# Check for the number of invocations expected. One invocation is
# local, one is remote (if the branch is remote).
if smart_enabled and isinstance(branch, RemoteBranch):
length = 2
else:
length = 1
self.assertEqual(length, len(self.pre_hook_calls))
self.assertEqual(length, len(self.post_hook_calls))
def test_set_revision_history(self):
branch = self.make_branch('')
branch.set_revision_history([])
self.assertPreAndPostHooksWereInvoked(branch, True)
def test_set_last_revision_info(self):
branch = self.make_branch('')
branch.set_last_revision_info(0, NULL_REVISION)
self.assertPreAndPostHooksWereInvoked(branch, True)
def test_generate_revision_history(self):
branch = self.make_branch('')
branch.generate_revision_history(NULL_REVISION)
# NB: for HPSS protocols < v3, the server does not invoke branch tip
# change events on generate_revision_history, as the change is done
# directly by the client over the VFS.
self.assertPreAndPostHooksWereInvoked(branch, True)
def test_pull(self):
source_branch = self.make_branch_with_revision_ids('rev-1', 'rev-2')
self.resetHookCalls()
destination_branch = self.make_branch('destination')
destination_branch.pull(source_branch)
self.assertPreAndPostHooksWereInvoked(destination_branch, False)
def test_push(self):
source_branch = self.make_branch_with_revision_ids('rev-1', 'rev-2')
self.resetHookCalls()
destination_branch = self.make_branch('destination')
source_branch.push(destination_branch)
self.assertPreAndPostHooksWereInvoked(destination_branch, True)
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