~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2007, 2009 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

from bzrlib.hooks import (

    HookPoint,

    Hooks,

    known_hooks,

    known_hooks_key_to_object,

    known_hooks_key_to_parent_and_attribute,

    )

from bzrlib.errors import (

    UnknownHook,

    )

from bzrlib.tests import TestCase

class TestHooks(TestCase):

    def test_create_hook_first(self):

        hooks = Hooks()

        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)

        hooks.create_hook(hook)

        self.assertEqual(hook, hooks['post_tip_change'])

    def test_create_hook_name_collision_errors(self):

        hooks = Hooks()

        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)

        hook2 = HookPoint("post_tip_change", None, None, None)

        hooks.create_hook(hook)

        self.assertRaises(errors.DuplicateKey, hooks.create_hook, hook2)

        self.assertEqual(hook, hooks['post_tip_change'])

    def test_docs(self):

        """docs() should return something reasonable about the Hooks."""

        class MyHooks(Hooks):

            pass

        hooks = MyHooks()

        hooks['legacy'] = []

        hook1 = HookPoint('post_tip_change',

            "Invoked after the tip of a branch changes. Called with "

            "a ChangeBranchTipParams object.", (1, 4), None)

        hook2 = HookPoint('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)

        hooks.create_hook(hook1)

        hooks.create_hook(hook2)

        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()

        self.assertRaises(UnknownHook, hooks.install_named_hook, 'silly',

                          None, "")

    def test_install_named_hook_appends_known_hook(self):

        hooks = 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()

        hooks['set_rh'] = []

        hooks.install_named_hook('set_rh', None, "demo")

        self.assertEqual("demo", hooks.get_hook_name(None))

class TestHook(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 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(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))

    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')))