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bzrlib/tests/test_hooks.py
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from bzrlib import (
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    branch,
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    errors,
 
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    hooks as _mod_hooks,
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    pyutils,
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    tests,
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    )
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    known_hooks,
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    known_hooks_key_to_object,
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    known_hooks_key_to_parent_and_attribute,
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    _lazy_hooks,
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    )
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from bzrlib.symbol_versioning import (
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    deprecated_in,
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class TestHooks(tests.TestCase):
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    def test_create_hook_first(self):
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        hooks = Hooks()
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
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        doc = ("Invoked after changing the tip of a branch object. Called with"
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            "a bzrlib.branch.PostChangeBranchTipParams object")
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        hook = HookPoint("post_tip_change", doc, (0, 15), None)
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        hooks.create_hook(hook)
 
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        self.applyDeprecated(deprecated_in((2, 4)), hooks.create_hook, hook)
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        self.assertEqual(hook, hooks['post_tip_change'])
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    def test_create_hook_name_collision_errors(self):
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        hooks = Hooks()
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
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        doc = ("Invoked after changing the tip of a branch object. Called with"
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            "a bzrlib.branch.PostChangeBranchTipParams object")
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        hook = HookPoint("post_tip_change", doc, (0, 15), None)
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        hook2 = HookPoint("post_tip_change", None, None, None)
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        hooks.create_hook(hook)
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        self.assertRaises(errors.DuplicateKey, hooks.create_hook, hook2)
 
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        self.applyDeprecated(deprecated_in((2, 4)), hooks.create_hook, hook)
 
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        self.assertRaises(errors.DuplicateKey, self.applyDeprecated,
 
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            deprecated_in((2, 4, 0)), hooks.create_hook, hook2)
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        self.assertEqual(hook, hooks['post_tip_change'])
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    def test_docs(self):
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        """docs() should return something reasonable about the Hooks."""
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        class MyHooks(Hooks):
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            pass
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        hooks = MyHooks()
 
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        hooks = MyHooks("bzrlib.tests.test_hooks", "some_hooks")
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        hooks['legacy'] = []
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        hook1 = HookPoint('post_tip_change',
 
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        hooks.add_hook('post_tip_change',
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            "Invoked after the tip of a branch changes. Called with "
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            "a ChangeBranchTipParams object.", (1, 4), None)
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        hook2 = HookPoint('pre_tip_change',
 
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            "a ChangeBranchTipParams object.", (1, 4))
 
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        hooks.add_hook('pre_tip_change',
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            "Invoked before the tip of a branch changes. Called with "
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            "a ChangeBranchTipParams object. Hooks should raise "
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            "TipChangeRejected to signal that a tip change is not permitted.",
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            (1, 6), None)
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        hooks.create_hook(hook1)
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        hooks.create_hook(hook2)
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        self.assertEqualDiff(
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            "MyHooks\n"
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            "-------\n"
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            "signal that a tip change is not permitted.\n", hooks.docs())
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    def test_install_named_hook_raises_unknown_hook(self):
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        hooks = Hooks()
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
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        self.assertRaises(errors.UnknownHook, hooks.install_named_hook, 'silly',
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                          None, "")
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    def test_install_named_hook_appends_known_hook(self):
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        hooks = Hooks()
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
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        hooks['set_rh'] = []
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        hooks.install_named_hook('set_rh', None, "demo")
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        self.assertEqual(hooks['set_rh'], [None])
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    def test_install_named_hook_and_retrieve_name(self):
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        hooks = Hooks()
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "somehooks")
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        hooks['set_rh'] = []
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        hooks.install_named_hook('set_rh', None, "demo")
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        self.assertEqual("demo", hooks.get_hook_name(None))
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    def test_uninstall_named_hook(self):
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
 
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        hooks.add_hook('set_rh', "Set revision history", (2, 0))
 
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        hooks.install_named_hook('set_rh', None, "demo")
 
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        self.assertEqual(1, len(hooks["set_rh"]))
 
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        hooks.uninstall_named_hook("set_rh", "demo")
 
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        self.assertEqual(0, len(hooks["set_rh"]))
 
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    def test_uninstall_multiple_named_hooks(self):
 
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        # Multiple callbacks with the same label all get removed
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
 
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        hooks.add_hook('set_rh', "Set revision history", (2, 0))
 
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        hooks.install_named_hook('set_rh', 1, "demo")
 
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        hooks.install_named_hook('set_rh', 2, "demo")
 
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        hooks.install_named_hook('set_rh', 3, "othername")
 
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        self.assertEqual(3, len(hooks["set_rh"]))
 
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        hooks.uninstall_named_hook("set_rh", "demo")
 
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        self.assertEqual(1, len(hooks["set_rh"]))
 
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    def test_uninstall_named_hook_unknown_callable(self):
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
 
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        hooks.add_hook('set_rh', "Set revision hsitory", (2, 0))
 
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        self.assertRaises(KeyError, hooks.uninstall_named_hook, "set_rh",
 
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            "demo")
 
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    def test_uninstall_named_hook_raises_unknown_hook(self):
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
 
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        self.assertRaises(errors.UnknownHook, hooks.uninstall_named_hook,
 
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            'silly', "")
 
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    def test_uninstall_named_hook_old_style(self):
 
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        hooks = Hooks("bzrlib.tests.test_hooks", "some_hooks")
 
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        hooks["set_rh"] = []
 
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        hooks.install_named_hook('set_rh', None, "demo")
 
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        self.assertRaises(errors.UnsupportedOperation,
 
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            hooks.uninstall_named_hook, "set_rh", "demo")
 
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    hooks = Hooks("bzrlib.tests.test_hooks", "TestHooks.hooks")
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    def test_install_lazy_named_hook(self):
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        set_rh = lambda: None
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        install_lazy_named_hook('bzrlib.tests.test_hooks',
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            'TestHooks.hooks', 'set_rh', set_rh, "demo")
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        set_rh_lazy_hooks = _lazy_hooks[
 
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        set_rh_lazy_hooks = _mod_hooks._lazy_hooks[
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            ('bzrlib.tests.test_hooks', 'TestHooks.hooks', 'set_rh')]
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        self.assertEquals(1, len(set_rh_lazy_hooks))
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        self.assertEquals(set_rh, set_rh_lazy_hooks[0][0].get_obj())
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    set_rh = lambda: None
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    def test_install_named_hook_lazy(self):
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        hooks = Hooks()
 
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        hooks = Hooks("bzrlib.tests.hooks", "some_hooks")
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        hooks['set_rh'] = HookPoint("set_rh", "doc", (0, 15), None)
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        hooks.install_named_hook_lazy('set_rh', 'bzrlib.tests.test_hooks',
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            'TestHooks.set_rh', "demo")
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    def test_install_named_hook_lazy_old(self):
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        # An exception is raised if a lazy hook is raised for
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        # an old style hook point.
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        hooks = Hooks()
 
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        hooks = Hooks("bzrlib.tests.hooks", "some_hooks")
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        hooks['set_rh'] = []
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        self.assertRaises(errors.UnsupportedOperation,
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            hooks.install_named_hook_lazy,
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    def test_valid_lazy_hooks(self):
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        # Make sure that all the registered lazy hooks are referring to existing
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        # hook points which allow lazy registration.
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        for key, callbacks in _lazy_hooks.iteritems():
 
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        for key, callbacks in _mod_hooks._lazy_hooks.iteritems():
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            (module_name, member_name, hook_name) = key
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            obj = pyutils.get_named_object(module_name, member_name)
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            self.assertEquals(obj._module, module_name)
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            "my callback")
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        self.assertEqual([TestHook.lazy_callback], list(hook))
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    def test_uninstall(self):
 
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        hook = HookPoint("foo", "no docs", None, None)
 
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        hook.hook_lazy(
 
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            "bzrlib.tests.test_hooks", "TestHook.lazy_callback",
 
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            "my callback")
 
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        self.assertEqual([TestHook.lazy_callback], list(hook))
 
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        hook.uninstall("my callback")
 
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        self.assertEqual([], list(hook))
 
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    def test_uninstall_unknown(self):
 
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        hook = HookPoint("foo", "no docs", None, None)
 
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        self.assertRaises(KeyError, hook.uninstall, "my callback")
 
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    def test___repr(self):
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        # The repr should list all the callbacks, with names.
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        hook = HookPoint("foo", "no docs", None, None)