~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005-2011 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

import errno

import inspect

import sys

from bzrlib import (

    builtins,

    commands,

    config,

    errors,

    option,

    tests,

    trace,

    )

from bzrlib.commands import display_command

from bzrlib.tests import TestSkipped

class TestCommands(tests.TestCase):

    def test_all_commands_have_help(self):

        commands._register_builtin_commands()

        commands_without_help = set()

        base_doc = inspect.getdoc(commands.Command)

        for cmd_name in commands.all_command_names():

            cmd = commands.get_cmd_object(cmd_name)

            cmd_help = cmd.help()

            if not cmd_help or cmd_help == base_doc:

                commands_without_help.append(cmd_name)

        self.assertLength(0, commands_without_help)

    def test_display_command(self):

        """EPIPE message is selectively suppressed"""

        def pipe_thrower():

            raise IOError(errno.EPIPE, "Bogus pipe error")

        self.assertRaises(IOError, pipe_thrower)

        @display_command

        def non_thrower():

            pipe_thrower()

        non_thrower()

        @display_command

        def other_thrower():

            raise IOError(errno.ESPIPE, "Bogus pipe error")

        self.assertRaises(IOError, other_thrower)

    def test_unicode_command(self):

        # This error is thrown when we can't find the command in the

        # list of available commands

        self.assertRaises(errors.BzrCommandError,

                          commands.run_bzr, [u'cmd\xb5'])

    def test_unicode_option(self):

        # This error is actually thrown by optparse, when it

        # can't find the given option

        import optparse

        if optparse.__version__ == "1.5.3":

            raise TestSkipped("optparse 1.5.3 can't handle unicode options")

        self.assertRaises(errors.BzrCommandError,

                          commands.run_bzr, ['log', u'--option\xb5'])

    @staticmethod

    def get_command(options):

        class cmd_foo(commands.Command):

            __doc__ = 'Bar'

            takes_options = options

        return cmd_foo()

    def test_help_hidden(self):

        c = self.get_command([option.Option('foo', hidden=True)])

        self.assertNotContainsRe(c.get_help_text(), '--foo')

    def test_help_not_hidden(self):

        c = self.get_command([option.Option('foo', hidden=False)])

        self.assertContainsRe(c.get_help_text(), '--foo')

class TestInsideCommand(tests.TestCaseInTempDir):

    def test_command_see_config_overrides(self):

        def run(cmd):

            # We override the run() command method so we can observe the

            # overrides from inside.

            c = config.GlobalStack()

            self.assertEquals('12', c.get('xx'))

            self.assertEquals('foo', c.get('yy'))

        self.overrideAttr(builtins.cmd_rocks, 'run', run)

        self.run_bzr(['rocks', '-Oxx=12', '-Oyy=foo'])

        c = config.GlobalStack()

        # Ensure that we don't leak outside of the command

        self.assertEquals(None, c.get('xx'))

        self.assertEquals(None, c.get('yy'))

class TestInvokedAs(tests.TestCase):

    def test_invoked_as(self):

        """The command object knows the actual name used to invoke it."""

        commands.install_bzr_command_hooks()

        commands._register_builtin_commands()

        # get one from the real get_cmd_object.

        c = commands.get_cmd_object('ci')

        self.assertIsInstance(c, builtins.cmd_commit)

        self.assertEquals(c.invoked_as, 'ci')

class TestGetAlias(tests.TestCase):

    def _get_config(self, config_text):

        my_config = config.GlobalConfig.from_string(config_text)

        return my_config

    def test_simple(self):

        my_config = self._get_config("[ALIASES]\n"

            "diff=diff -r -2..-1\n")

        self.assertEqual([u'diff', u'-r', u'-2..-1'],

            commands.get_alias("diff", config=my_config))

    def test_single_quotes(self):

        my_config = self._get_config("[ALIASES]\n"

            "diff=diff -r -2..-1 --diff-options "

            "'--strip-trailing-cr -wp'\n")

        self.assertEqual([u'diff', u'-r', u'-2..-1', u'--diff-options',

                          u'--strip-trailing-cr -wp'],

                          commands.get_alias("diff", config=my_config))

    def test_double_quotes(self):

        my_config = self._get_config("[ALIASES]\n"

            "diff=diff -r -2..-1 --diff-options "

            "\"--strip-trailing-cr -wp\"\n")

        self.assertEqual([u'diff', u'-r', u'-2..-1', u'--diff-options',

                          u'--strip-trailing-cr -wp'],

                          commands.get_alias("diff", config=my_config))

    def test_unicode(self):

        my_config = self._get_config("[ALIASES]\n"

            u'iam=whoami "Erik B\u00e5gfors <erik@bagfors.nu>"\n')

        self.assertEqual([u'whoami', u'Erik B\u00e5gfors <erik@bagfors.nu>'],

                          commands.get_alias("iam", config=my_config))

class TestSeeAlso(tests.TestCase):

    """Tests for the see also functional of Command."""

    @staticmethod

    def _get_command_with_see_also(see_also):

        class ACommand(commands.Command):

            __doc__ = """A sample command."""

            _see_also = see_also

        return ACommand()

    def test_default_subclass_no_see_also(self):

        command = self._get_command_with_see_also([])

        self.assertEqual([], command.get_see_also())

    def test__see_also(self):

        """When _see_also is defined, it sets the result of get_see_also()."""

        command = self._get_command_with_see_also(['bar', 'foo'])

        self.assertEqual(['bar', 'foo'], command.get_see_also())

    def test_deduplication(self):

        """Duplicates in _see_also are stripped out."""

        command = self._get_command_with_see_also(['foo', 'foo'])

        self.assertEqual(['foo'], command.get_see_also())

    def test_sorted(self):

        """_see_also is sorted by get_see_also."""

        command = self._get_command_with_see_also(['foo', 'bar'])

        self.assertEqual(['bar', 'foo'], command.get_see_also())

    def test_additional_terms(self):

        """Additional terms can be supplied and are deduped and sorted."""

        command = self._get_command_with_see_also(['foo', 'bar'])

        self.assertEqual(['bar', 'foo', 'gam'],

            command.get_see_also(['gam', 'bar', 'gam']))

class TestRegisterLazy(tests.TestCase):

    def setUp(self):

        tests.TestCase.setUp(self)

        import bzrlib.tests.fake_command

        del sys.modules['bzrlib.tests.fake_command']

        global lazy_command_imported

        lazy_command_imported = False

        commands.install_bzr_command_hooks()

    @staticmethod

    def remove_fake():

        commands.plugin_cmds.remove('fake')

    def assertIsFakeCommand(self, cmd_obj):

        from bzrlib.tests.fake_command import cmd_fake

        self.assertIsInstance(cmd_obj, cmd_fake)

    def test_register_lazy(self):

        """Ensure lazy registration works"""

        commands.plugin_cmds.register_lazy('cmd_fake', [],

                                           'bzrlib.tests.fake_command')

        self.addCleanup(self.remove_fake)

        self.assertFalse(lazy_command_imported)

        fake_instance = commands.get_cmd_object('fake')

        self.assertTrue(lazy_command_imported)

        self.assertIsFakeCommand(fake_instance)

    def test_get_unrelated_does_not_import(self):

        commands.plugin_cmds.register_lazy('cmd_fake', [],

                                           'bzrlib.tests.fake_command')

        self.addCleanup(self.remove_fake)

        commands.get_cmd_object('status')

        self.assertFalse(lazy_command_imported)

    def test_aliases(self):

        commands.plugin_cmds.register_lazy('cmd_fake', ['fake_alias'],

                                           'bzrlib.tests.fake_command')

        self.addCleanup(self.remove_fake)

        fake_instance = commands.get_cmd_object('fake_alias')

        self.assertIsFakeCommand(fake_instance)

class TestExtendCommandHook(tests.TestCase):

    def test_fires_on_get_cmd_object(self):

        # The extend_command(cmd) hook fires when commands are delivered to the

        # ui, not simply at registration (because lazy registered plugin

        # commands are registered).

        # when they are simply created.

        hook_calls = []

        commands.install_bzr_command_hooks()

        commands.Command.hooks.install_named_hook(

            "extend_command", hook_calls.append, None)

        # create a command, should not fire

        class cmd_test_extend_command_hook(commands.Command):

            __doc__ = """A sample command."""

        self.assertEqual([], hook_calls)

        # -- as a builtin

        # register the command class, should not fire

        try:

            commands.builtin_command_registry.register(cmd_test_extend_command_hook)

            self.assertEqual([], hook_calls)

            # and ask for the object, should fire

            cmd = commands.get_cmd_object('test-extend-command-hook')

            # For resilience - to ensure all code paths hit it - we

            # fire on everything returned in the 'cmd_dict', which is currently

            # all known commands, so assert that cmd is in hook_calls

            self.assertSubset([cmd], hook_calls)

            del hook_calls[:]

        finally:

            commands.builtin_command_registry.remove('test-extend-command-hook')

        # -- as a plugin lazy registration

        try:

            # register the command class, should not fire

            commands.plugin_cmds.register_lazy('cmd_fake', [],

                                               'bzrlib.tests.fake_command')

            self.assertEqual([], hook_calls)

            # and ask for the object, should fire

            cmd = commands.get_cmd_object('fake')

            self.assertEqual([cmd], hook_calls)

        finally:

            commands.plugin_cmds.remove('fake')

class TestGetCommandHook(tests.TestCase):

    def test_fires_on_get_cmd_object(self):

        # The get_command(cmd) hook fires when commands are delivered to the

        # ui.

        commands.install_bzr_command_hooks()

        hook_calls = []

        class ACommand(commands.Command):

            __doc__ = """A sample command."""

        def get_cmd(cmd_or_None, cmd_name):

            hook_calls.append(('called', cmd_or_None, cmd_name))

            if cmd_name in ('foo', 'info'):

                return ACommand()

        commands.Command.hooks.install_named_hook(

            "get_command", get_cmd, None)

        # create a command directly, should not fire

        cmd = ACommand()

        self.assertEqual([], hook_calls)

        # ask by name, should fire and give us our command

        cmd = commands.get_cmd_object('foo')

        self.assertEqual([('called', None, 'foo')], hook_calls)

        self.assertIsInstance(cmd, ACommand)

        del hook_calls[:]

        # ask by a name that is supplied by a builtin - the hook should still

        # fire and we still get our object, but we should see the builtin

        # passed to the hook.

        cmd = commands.get_cmd_object('info')

        self.assertIsInstance(cmd, ACommand)

        self.assertEqual(1, len(hook_calls))

        self.assertEqual('info', hook_calls[0][2])

        self.assertIsInstance(hook_calls[0][1], builtins.cmd_info)

class TestGetMissingCommandHook(tests.TestCase):

    def hook_missing(self):

        """Hook get_missing_command for testing."""

        self.hook_calls = []

        class ACommand(commands.Command):

            __doc__ = """A sample command."""

        def get_missing_cmd(cmd_name):

            self.hook_calls.append(('called', cmd_name))

            if cmd_name in ('foo', 'info'):

                return ACommand()

        commands.Command.hooks.install_named_hook(

            "get_missing_command", get_missing_cmd, None)

        self.ACommand = ACommand

    def test_fires_on_get_cmd_object(self):

        # The get_missing_command(cmd) hook fires when commands are delivered to the

        # ui.

        self.hook_missing()

        # create a command directly, should not fire

        self.cmd = self.ACommand()

        self.assertEqual([], self.hook_calls)

        # ask by name, should fire and give us our command

        cmd = commands.get_cmd_object('foo')

        self.assertEqual([('called', 'foo')], self.hook_calls)

        self.assertIsInstance(cmd, self.ACommand)

        del self.hook_calls[:]

        # ask by a name that is supplied by a builtin - the hook should not

        # fire and we still get our object.

        commands.install_bzr_command_hooks()

        cmd = commands.get_cmd_object('info')

        self.assertNotEqual(None, cmd)

        self.assertEqual(0, len(self.hook_calls))

    def test_skipped_on_HelpCommandIndex_get_topics(self):

        # The get_missing_command(cmd_name) hook is not fired when

        # looking up help topics.

        self.hook_missing()

        topic = commands.HelpCommandIndex()

        topics = topic.get_topics('foo')

        self.assertEqual([], self.hook_calls)

class TestListCommandHook(tests.TestCase):

    def test_fires_on_all_command_names(self):

        # The list_commands() hook fires when all_command_names() is invoked.

        hook_calls = []

        commands.install_bzr_command_hooks()

        def list_my_commands(cmd_names):

            hook_calls.append('called')

            cmd_names.update(['foo', 'bar'])

            return cmd_names

        commands.Command.hooks.install_named_hook(

            "list_commands", list_my_commands, None)

        # Get a command, which should not trigger the hook.

        cmd = commands.get_cmd_object('info')

        self.assertEqual([], hook_calls)

        # Get all command classes (for docs and shell completion).

        cmds = list(commands.all_command_names())

        self.assertEqual(['called'], hook_calls)

        self.assertSubset(['foo', 'bar'], cmds)

class TestPreAndPostCommandHooks(tests.TestCase):

    class TestError(StandardError):

        __doc__ = """A test exception."""

    def test_pre_and_post_hooks(self):

        hook_calls = []

        def pre_command(cmd):

            self.assertEqual([], hook_calls)

            hook_calls.append('pre')

        def post_command(cmd):

            self.assertEqual(['pre', 'run'], hook_calls)

            hook_calls.append('post')

        def run(cmd):

            self.assertEqual(['pre'], hook_calls)

            hook_calls.append('run')

        self.overrideAttr(builtins.cmd_rocks, 'run', run)

        commands.install_bzr_command_hooks()

        commands.Command.hooks.install_named_hook(

            "pre_command", pre_command, None)

        commands.Command.hooks.install_named_hook(

            "post_command", post_command, None)

        self.assertEqual([], hook_calls)

        self.run_bzr(['rocks', '-Oxx=12', '-Oyy=foo'])

        self.assertEqual(['pre', 'run', 'post'], hook_calls)

    def test_post_hook_provided_exception(self):

        hook_calls = []

        def post_command(cmd):

            hook_calls.append('post')

        def run(cmd):

            hook_calls.append('run')

            raise self.TestError()

        self.overrideAttr(builtins.cmd_rocks, 'run', run)

        commands.install_bzr_command_hooks()

        commands.Command.hooks.install_named_hook(

            "post_command", post_command, None)

        self.assertEqual([], hook_calls)

        self.assertRaises(self.TestError, commands.run_bzr, [u'rocks'])

        self.assertEqual(['run', 'post'], hook_calls)

    def test_pre_command_error(self):

        """Ensure an BzrCommandError in pre_command aborts the command"""

        hook_calls = []

        def pre_command(cmd):

            hook_calls.append('pre')

            # verify that all subclasses of BzrCommandError caught too

            raise errors.BzrOptionError()

        def post_command(cmd, e):

            self.fail('post_command should not be called')

        def run(cmd):

            self.fail('command should not be called')

        self.overrideAttr(builtins.cmd_rocks, 'run', run)

        commands.install_bzr_command_hooks()

        commands.Command.hooks.install_named_hook(

            "pre_command", pre_command, None)

        commands.Command.hooks.install_named_hook(

            "post_command", post_command, None)

        self.assertEqual([], hook_calls)

        self.assertRaises(errors.BzrCommandError,

                          commands.run_bzr, [u'rocks'])

        self.assertEqual(['pre'], hook_calls)