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# Copyright (C) 2007-2010 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 for the core Hooks logic."""
from bzrlib import (
branch,
errors,
hooks as _mod_hooks,
pyutils,
tests,
)
from bzrlib.hooks import (
HookPoint,
Hooks,
install_lazy_named_hook,
known_hooks,
known_hooks_key_to_object,
)
from bzrlib.symbol_versioning import (
deprecated_in,
)
class TestHooks(tests.TestCase):
def test_docs(self):
"""docs() should return something reasonable about the Hooks."""
class MyHooks(Hooks):
pass
hooks = MyHooks("bzrlib.tests.test_hooks", "some_hooks")
hooks['legacy'] = []
hooks.add_hook('post_tip_change',
"Invoked after the tip of a branch changes. Called with "
"a ChangeBranchTipParams object.", (1, 4))
hooks.add_hook('pre_tip_change',
"Invoked before the tip of a branch changes. Called with "
"a ChangeBranchTipParams object. Hooks should raise "
"TipChangeRejected to signal that a tip change is not permitted.",
(1, 6), None)
self.assertEqualDiff(
"MyHooks\n"
"-------\n"
"\n"
"legacy\n"
"~~~~~~\n"
"\n"
"An old-style hook. For documentation see the __init__ method of 'MyHooks'\n"
"\n"
"post_tip_change\n"
"~~~~~~~~~~~~~~~\n"
"\n"
"Introduced in: 1.4\n"
"\n"
"Invoked after the tip of a branch changes. Called with a\n"
"ChangeBranchTipParams object.\n"
"\n"
"pre_tip_change\n"
"~~~~~~~~~~~~~~\n"
"\n"
"Introduced in: 1.6\n"
"\n"
"Invoked before the tip of a branch changes. Called with a\n"
"ChangeBranchTipParams object. Hooks should raise TipChangeRejected to\n"
"signal that a tip change is not permitted.\n", hooks.docs())
def test_install_named_hook_raises_unknown_hook(self):
hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
self.assertRaises(errors.UnknownHook, hooks.install_named_hook, 'silly',
None, "")
def test_install_named_hook_appends_known_hook(self):
hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
hooks['set_rh'] = []
hooks.install_named_hook('set_rh', None, "demo")
self.assertEqual(hooks['set_rh'], [None])
def test_install_named_hook_and_retrieve_name(self):
hooks = Hooks("bzrlib.tests.test_hooks", "somehooks")
hooks['set_rh'] = []
hooks.install_named_hook('set_rh', None, "demo")
self.assertEqual("demo", hooks.get_hook_name(None))
def test_uninstall_named_hook(self):
hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
hooks.add_hook('set_rh', "Set revision history", (2, 0))
hooks.install_named_hook('set_rh', None, "demo")
self.assertEqual(1, len(hooks["set_rh"]))
hooks.uninstall_named_hook("set_rh", "demo")
self.assertEqual(0, len(hooks["set_rh"]))
def test_uninstall_multiple_named_hooks(self):
# Multiple callbacks with the same label all get removed
hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
hooks.add_hook('set_rh', "Set revision history", (2, 0))
hooks.install_named_hook('set_rh', 1, "demo")
hooks.install_named_hook('set_rh', 2, "demo")
hooks.install_named_hook('set_rh', 3, "othername")
self.assertEqual(3, len(hooks["set_rh"]))
hooks.uninstall_named_hook("set_rh", "demo")
self.assertEqual(1, len(hooks["set_rh"]))
def test_uninstall_named_hook_unknown_callable(self):
hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
hooks.add_hook('set_rh', "Set revision hsitory", (2, 0))
self.assertRaises(KeyError, hooks.uninstall_named_hook, "set_rh",
"demo")
def test_uninstall_named_hook_raises_unknown_hook(self):
hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
self.assertRaises(errors.UnknownHook, hooks.uninstall_named_hook,
'silly', "")
def test_uninstall_named_hook_old_style(self):
hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
hooks["set_rh"] = []
hooks.install_named_hook('set_rh', None, "demo")
self.assertRaises(errors.UnsupportedOperation,
hooks.uninstall_named_hook, "set_rh", "demo")
hooks = Hooks("bzrlib.tests.test_hooks", "TestHooks.hooks")
def test_install_lazy_named_hook(self):
# When the hook points are not yet registered the hook is
# added to the _lazy_hooks dictionary in bzrlib.hooks.
self.hooks.add_hook('set_rh', "doc", (0, 15))
set_rh = lambda: None
install_lazy_named_hook('bzrlib.tests.test_hooks',
'TestHooks.hooks', 'set_rh', set_rh, "demo")
set_rh_lazy_hooks = _mod_hooks._lazy_hooks[
('bzrlib.tests.test_hooks', 'TestHooks.hooks', 'set_rh')]
self.assertEquals(1, len(set_rh_lazy_hooks))
self.assertEquals(set_rh, set_rh_lazy_hooks[0][0].get_obj())
self.assertEquals("demo", set_rh_lazy_hooks[0][1])
self.assertEqual(list(TestHooks.hooks['set_rh']), [set_rh])
set_rh = lambda: None
def test_install_named_hook_lazy(self):
hooks = Hooks("bzrlib.tests.hooks", "some_hooks")
hooks['set_rh'] = HookPoint("set_rh", "doc", (0, 15), None)
hooks.install_named_hook_lazy('set_rh', 'bzrlib.tests.test_hooks',
'TestHooks.set_rh', "demo")
self.assertEqual(list(hooks['set_rh']), [TestHooks.set_rh])
def test_install_named_hook_lazy_old(self):
# An exception is raised if a lazy hook is raised for
# an old style hook point.
hooks = Hooks("bzrlib.tests.hooks", "some_hooks")
hooks['set_rh'] = []
self.assertRaises(errors.UnsupportedOperation,
hooks.install_named_hook_lazy,
'set_rh', 'bzrlib.tests.test_hooks', 'TestHooks.set_rh',
"demo")
def test_valid_lazy_hooks(self):
# Make sure that all the registered lazy hooks are referring to existing
# hook points which allow lazy registration.
for key, callbacks in _mod_hooks._lazy_hooks.iteritems():
(module_name, member_name, hook_name) = key
obj = pyutils.get_named_object(module_name, member_name)
self.assertEquals(obj._module, module_name)
self.assertEquals(obj._member_name, member_name)
self.assertTrue(hook_name in obj)
self.assertIs(callbacks, obj[hook_name]._callbacks)
class TestHook(tests.TestCase):
def test___init__(self):
doc = ("Invoked after changing the tip of a branch object. Called with"
"a bzrlib.branch.PostChangeBranchTipParams object")
hook = HookPoint("post_tip_change", doc, (0, 15), None)
self.assertEqual(doc, hook.__doc__)
self.assertEqual("post_tip_change", hook.name)
self.assertEqual((0, 15), hook.introduced)
self.assertEqual(None, hook.deprecated)
self.assertEqual([], list(hook))
def test_docs(self):
doc = ("Invoked after changing the tip of a branch object. Called with"
" a bzrlib.branch.PostChangeBranchTipParams object")
hook = HookPoint("post_tip_change", doc, (0, 15), None)
self.assertEqual("post_tip_change\n"
"~~~~~~~~~~~~~~~\n"
"\n"
"Introduced in: 0.15\n"
"\n"
"Invoked after changing the tip of a branch object. Called with a\n"
"bzrlib.branch.PostChangeBranchTipParams object\n", hook.docs())
def test_hook(self):
hook = HookPoint("foo", "no docs", None, None)
def callback():
pass
hook.hook(callback, "my callback")
self.assertEqual([callback], list(hook))
def lazy_callback():
pass
def test_lazy_hook(self):
hook = HookPoint("foo", "no docs", None, None)
hook.hook_lazy(
"bzrlib.tests.test_hooks", "TestHook.lazy_callback",
"my callback")
self.assertEqual([TestHook.lazy_callback], list(hook))
def test_uninstall(self):
hook = HookPoint("foo", "no docs", None, None)
hook.hook_lazy(
"bzrlib.tests.test_hooks", "TestHook.lazy_callback",
"my callback")
self.assertEqual([TestHook.lazy_callback], list(hook))
hook.uninstall("my callback")
self.assertEqual([], list(hook))
def test_uninstall_unknown(self):
hook = HookPoint("foo", "no docs", None, None)
self.assertRaises(KeyError, hook.uninstall, "my callback")
def test___repr(self):
# The repr should list all the callbacks, with names.
hook = HookPoint("foo", "no docs", None, None)
def callback():
pass
hook.hook(callback, "my callback")
callback_repr = repr(callback)
self.assertEqual(
'<HookPoint(foo), callbacks=[%s(my callback)]>' %
callback_repr, repr(hook))
class TestHookRegistry(tests.TestCase):
def test_items_are_reasonable_keys(self):
# All the items in the known_hooks registry need to map from
# (module_name, member_name) tuples to the callable used to get an
# empty Hooks for that attribute. This is used to support the test
# suite which needs to generate empty hooks (and HookPoints) to ensure
# isolation and prevent tests failing spuriously.
for key, factory in known_hooks.items():
self.assertTrue(callable(factory),
"The factory(%r) for %r is not callable" % (factory, key))
obj = known_hooks_key_to_object(key)
self.assertIsInstance(obj, Hooks)
new_hooks = factory()
self.assertIsInstance(obj, Hooks)
self.assertEqual(type(obj), type(new_hooks))
self.assertEqual("No hook name", new_hooks.get_hook_name(None))
def test_known_hooks_key_to_object(self):
self.assertIs(branch.Branch.hooks,
known_hooks_key_to_object(('bzrlib.branch', 'Branch.hooks')))
def test_known_hooks_key_to_parent_and_attribute(self):
self.assertEqual((branch.Branch, 'hooks'),
known_hooks.key_to_parent_and_attribute(
('bzrlib.branch', 'Branch.hooks')))
self.assertEqual((branch, 'Branch'),
known_hooks.key_to_parent_and_attribute(
('bzrlib.branch', 'Branch')))
|