~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005 by 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Tests for plugins"""

# XXX: There are no plugin tests at the moment because the plugin module

# affects the global state of the process.  See bzrlib/plugins.py for more

# comments.

import os

from StringIO import StringIO

import bzrlib.plugin

import bzrlib.plugins

import bzrlib.commands

import bzrlib.help

from bzrlib.tests import TestCaseInTempDir

from bzrlib.osutils import pathjoin, abspath

class PluginTest(TestCaseInTempDir):

    """Create an external plugin and test loading."""

#    def test_plugin_loading(self):

#        orig_help = self.run_bzr_captured('bzr help commands')[0]

#        os.mkdir('plugin_test')

#        f = open(pathjoin('plugin_test', 'myplug.py'), 'wt')

#        f.write(PLUGIN_TEXT)

#        f.close()

#        newhelp = self.run_bzr_captured('bzr help commands')[0]

#        assert newhelp.startswith('You have been overridden\n')

#        # We added a line, but the rest should work

#        assert newhelp[25:] == help

#

#        assert backtick('bzr commit -m test') == "I'm sorry dave, you can't do that\n"

#

#        shutil.rmtree('plugin_test')

#

#         os.environ['BZRPLUGINPATH'] = abspath('plugin_test')

#         help = backtick('bzr help commands')

#         assert help.find('myplug') != -1

#         assert help.find('Just a simple test plugin.') != -1

#         assert backtick('bzr myplug') == 'Hello from my plugin\n'

#         assert backtick('bzr mplg') == 'Hello from my plugin\n'

#         f = open(pathjoin('plugin_test', 'override.py'), 'wb')

#         f.write("""import bzrlib, bzrlib.commands

#     class cmd_commit(bzrlib.commands.cmd_commit):

#         '''Commit changes into a new revision.'''

#         def run(self, *args, **kwargs):

#             print "I'm sorry dave, you can't do that"

#     class cmd_help(bzrlib.commands.cmd_help):

#         '''Show help on a command or other topic.'''

#         def run(self, *args, **kwargs):

#             print "You have been overridden"

#             bzrlib.commands.cmd_help.run(self, *args, **kwargs)

#         """

PLUGIN_TEXT = """\

import bzrlib.commands

class cmd_myplug(bzrlib.commands.Command):

    '''Just a simple test plugin.'''

    aliases = ['mplg']

    def run(self):

        print 'Hello from my plugin'

"""

# TODO: Write a test for plugin decoration of commands.

class TestOneNamedPluginOnly(TestCaseInTempDir):

    activeattributes = {}

    def test_plugins_with_the_same_name_are_not_loaded(self):

        # This test tests that having two plugins in different

        # directories does not result in both being loaded.

        # get a file name we can use which is also a valid attribute

        # for accessing in activeattributes. - we cannot give import parameters.

        tempattribute = "0"

        self.failIf(tempattribute in self.activeattributes)

        # set a place for the plugins to record their loading, and at the same

        # time validate that the location the plugins should record to is

        # valid and correct.

        bzrlib.tests.test_plugins.TestOneNamedPluginOnly.activeattributes \

            [tempattribute] = []

        self.failUnless(tempattribute in self.activeattributes)

        # create two plugin directories

        os.mkdir('first')

        os.mkdir('second')

        # write a plugin that will record when its loaded in the 

        # tempattribute list.

        template = ("from bzrlib.tests.test_plugins import TestOneNamedPluginOnly\n"

                    "TestOneNamedPluginOnly.activeattributes[%r].append('%s')\n")

        print >> file(os.path.join('first', 'plugin.py'), 'w'), template % (tempattribute, 'first')

        print >> file(os.path.join('second', 'plugin.py'), 'w'), template % (tempattribute, 'second')

        try:

            bzrlib.plugin.load_from_dirs(['first', 'second'])

            self.assertEqual(['first'], self.activeattributes[tempattribute])

        finally:

            # remove the plugin 'plugin'

            del self.activeattributes[tempattribute]

            if getattr(bzrlib.plugins, 'plugin', None):

                del bzrlib.plugins.plugin

        self.failIf(getattr(bzrlib.plugins, 'plugin', None))

class TestAllPlugins(TestCaseInTempDir):

    def test_plugin_appears_in_all_plugins(self):

        # This test tests a new plugin appears in bzrlib.plugin.all_plugins().

        # check the plugin is not loaded already

        self.failIf(getattr(bzrlib.plugins, 'plugin', None))

        # write a plugin that _cannot_ fail to load.

        print >> file('plugin.py', 'w'), ""

        try:

            bzrlib.plugin.load_from_dirs(['.'])

            self.failUnless('plugin' in bzrlib.plugin.all_plugins())

            self.failUnless(getattr(bzrlib.plugins, 'plugin', None))

            self.assertEqual(bzrlib.plugin.all_plugins()['plugin'],

                             bzrlib.plugins.plugin)

        finally:

            # remove the plugin 'plugin'

            if getattr(bzrlib.plugins, 'plugin', None):

                del bzrlib.plugins.plugin

        self.failIf(getattr(bzrlib.plugins, 'plugin', None))

class TestPluginHelp(TestCaseInTempDir):

    def split_help_commands(self):

        help = {}

        current = None

        for line in self.capture('help commands').splitlines():

            if line.startswith('bzr '):

                current = line.split()[1]

            help[current] = help.get(current, '') + line

        return help

    def test_plugin_help_builtins_unaffected(self):

        # Check we don't get false positives

        help_commands = self.split_help_commands()

        for cmd_name in bzrlib.commands.builtin_command_names():

            if cmd_name in bzrlib.commands.plugin_command_names():

                continue

            help = StringIO()

            try:

                bzrlib.help.help_on_command(cmd_name, help)

            except NotImplementedError:

                # some commands have no help

                pass

            else:

                help.seek(0)

                self.assertNotContainsRe(help.read(), 'From plugin "[^"]*"')

            if help in help_commands.keys():

                # some commands are hidden

                help = help_commands[cmd_name]

                self.assertNotContainsRe(help, 'From plugin "[^"]*"')

    def test_plugin_help_shows_plugin(self):

        # Create a test plugin

        os.mkdir('plugin_test')

        f = open(pathjoin('plugin_test', 'myplug.py'), 'w')

        f.write(PLUGIN_TEXT)

        f.close()

        try:

            # Check its help

            bzrlib.plugin.load_from_dirs(['plugin_test'])

            bzrlib.commands.register_command( bzrlib.plugins.myplug.cmd_myplug)

            help = self.capture('help myplug')

            self.assertContainsRe(help, 'From plugin "myplug"')

            help = self.split_help_commands()['myplug']

            self.assertContainsRe(help, 'From plugin "myplug"')

        finally:

            # remove the plugin 'plugin'

            if getattr(bzrlib.plugins, 'plugin', None):

                del bzrlib.plugins.plugin