~bzr-pqm/bzr/bzr.dev

# 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

"""Unit tests for the bzrlib.help module."""

from cStringIO import StringIO

from bzrlib import (

    builtins,

    commands,

    errors,

    help,

    help_topics,

    plugin,

    tests,

    )

class TestHelp(tests.TestCase):

    def setUp(self):

        tests.TestCase.setUp(self)

        commands.install_bzr_command_hooks()

class TestCommandHelp(tests.TestCase):

    """Tests for help on commands."""

    def test_command_help_includes_see_also(self):

        class cmd_WithSeeAlso(commands.Command):

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

            _see_also = ['foo', 'bar']

        cmd = cmd_WithSeeAlso()

        helptext = cmd.get_help_text()

        self.assertEndsWith(

            helptext,

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'See also: bar, foo\n')

    def test_get_help_text(self):

        """Commands have a get_help_text method which returns their help."""

        class cmd_Demo(commands.Command):

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

        cmd = cmd_Demo()

        helptext = cmd.get_help_text()

        self.assertStartsWith(helptext,

            'Purpose: A sample command.\n'

            'Usage:   bzr Demo')

        self.assertEndsWith(helptext,

            '  -h, --help     Show help message.\n\n')

    def test_command_with_additional_see_also(self):

        class cmd_WithSeeAlso(commands.Command):

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

            _see_also = ['foo', 'bar']

        cmd = cmd_WithSeeAlso()

        helptext = cmd.get_help_text(['gam'])

        self.assertEndsWith(

            helptext,

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'See also: bar, foo, gam\n')

    def test_command_only_additional_see_also(self):

        class cmd_WithSeeAlso(commands.Command):

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

        cmd = cmd_WithSeeAlso()

        helptext = cmd.get_help_text(['gam'])

        self.assertEndsWith(

            helptext,

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'See also: gam\n')

    def test_get_help_topic(self):

        """The help topic for a Command is its name()."""

        class cmd_foo_bar(commands.Command):

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

        cmd = cmd_foo_bar()

        self.assertEqual(cmd.name(), cmd.get_help_topic())

    def test_formatted_help_text(self):

        """Help text should be plain text by default."""

        class cmd_Demo(commands.Command):

            __doc__ = """A sample command.

            :Examples:

                Example 1::

                    cmd arg1

                Example 2::

                    cmd arg2

            """

        cmd = cmd_Demo()

        helptext = cmd.get_help_text()

        self.assertEquals(

            helptext,

            'Purpose: A sample command.\n'

            'Usage:   bzr Demo\n'

            '\n'

            'Options:\n'

            '  --usage        Show usage message and options.\n'

            '  -0, --null     Use an ASCII NUL (\\0) separator rather than a newline.\n'

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'Examples:\n'

            '    Example 1:\n'

            '\n'

            '        cmd arg1\n'

            '\n'

            '    Example 2:\n'

            '\n'

            '        cmd arg2\n'

            '\n')

        helptext = cmd.get_help_text(plain=False)

        self.assertEquals(helptext,

            ':Purpose: A sample command.\n'

            ':Usage:   bzr Demo\n'

            '\n'

            ':Options:\n'

            '  --usage        Show usage message and options.\n'

            '  -0, --null     Use an ASCII NUL (\\0) separator rather than a newline.\n'

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            ':Examples:\n'

            '    Example 1::\n'

            '\n'

            '        cmd arg1\n'

            '\n'

            '    Example 2::\n'

            '\n'

            '        cmd arg2\n'

            '\n')

    def test_concise_help_text(self):

        """Concise help text excludes the descriptive sections."""

        class cmd_Demo(commands.Command):

            __doc__ = """A sample command.

            Blah blah blah.

            :Examples:

                Example 1::

                    cmd arg1

            """

        cmd = cmd_Demo()

        helptext = cmd.get_help_text()

        self.assertEqualDiff(

            helptext,

            'Purpose: A sample command.\n'

            'Usage:   bzr Demo\n'

            '\n'

            'Options:\n'

            '  --usage        Show usage message and options.\n'

            '  -0, --null     Use an ASCII NUL (\\0) separator rather than a newline.\n'

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'Description:\n'

            '  Blah blah blah.\n'

            '\n'

            'Examples:\n'

            '    Example 1:\n'

            '\n'

            '        cmd arg1\n'

            '\n')

        helptext = cmd.get_help_text(verbose=False)

        self.assertEquals(helptext,

            'Purpose: A sample command.\n'

            'Usage:   bzr Demo\n'

            '\n'

            'Options:\n'

            '  --usage        Show usage message and options.\n'

            '  -0, --null     Use an ASCII NUL (\\0) separator rather than a newline.\n'

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'See bzr help Demo for more details and examples.\n'

            '\n')

    def test_help_custom_section_ordering(self):

        """Custom descriptive sections should remain in the order given."""

        class cmd_Demo(commands.Command):

            __doc__ = """A sample command.

            Blah blah blah.

            :Formats:

              Interesting stuff about formats.

            :Examples:

              Example 1::

                cmd arg1

            :Tips:

              Clever things to keep in mind.

            """

        cmd = cmd_Demo()

        helptext = cmd.get_help_text()

        self.assertEqualDiff(

            helptext,

            'Purpose: A sample command.\n'

            'Usage:   bzr Demo\n'

            '\n'

            'Options:\n'

            '  --usage        Show usage message and options.\n'

            '  -0, --null     Use an ASCII NUL (\\0) separator rather than a newline.\n'

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'Description:\n'

            '  Blah blah blah.\n'

            '\n'

            'Formats:\n'

            '  Interesting stuff about formats.\n'

            '\n'

            'Examples:\n'

            '  Example 1:\n'

            '\n'

            '    cmd arg1\n'

            '\n'

            'Tips:\n'

            '  Clever things to keep in mind.\n'

            '\n')

    def test_help_text_custom_usage(self):

        """Help text may contain a custom usage section."""

        class cmd_Demo(commands.Command):

            __doc__ = """A sample command.

            :Usage:

                cmd Demo [opts] args

                cmd Demo -h

            Blah blah blah.

            """

        cmd = cmd_Demo()

        helptext = cmd.get_help_text()

        self.assertEquals(helptext,

            'Purpose: A sample command.\n'

            'Usage:\n'

            '    cmd Demo [opts] args\n'

            '\n'

            '    cmd Demo -h\n'

            '\n'

            '\n'

            'Options:\n'

            '  --usage        Show usage message and options.\n'

            '  -0, --null     Use an ASCII NUL (\\0) separator rather than a newline.\n'

            '  -v, --verbose  Display more information.\n'

            '  -q, --quiet    Only display errors and warnings.\n'

            '  -h, --help     Show help message.\n'

            '\n'

            'Description:\n'

            '  Blah blah blah.\n\n')

class TestRegisteredTopic(TestHelp):

    """Tests for the RegisteredTopic class."""

    def test_contruct(self):

        """Construction takes the help topic name for the registered item."""

        # validate our test

        self.assertTrue('basic' in help_topics.topic_registry)

        topic = help_topics.RegisteredTopic('basic')

        self.assertEqual('basic', topic.topic)

    def test_get_help_text(self):

        """A RegisteredTopic returns the get_detail results for get_help_text."""

        topic = help_topics.RegisteredTopic('commands')

        self.assertEqual(help_topics.topic_registry.get_detail('commands'),

            topic.get_help_text())

    def test_get_help_text_with_additional_see_also(self):

        topic = help_topics.RegisteredTopic('commands')

        self.assertEndsWith(

            topic.get_help_text(['foo', 'bar']),

            '\n'

            'See also: bar, foo\n')

    def test_get_help_text_loaded_from_file(self):

        # Pick a known topic stored in an external file

        topic = help_topics.RegisteredTopic('authentication')

        self.assertStartsWith(topic.get_help_text(),

            'Authentication Settings\n'

            '=======================\n'

            '\n')

    def test_get_help_topic(self):

        """The help topic for a RegisteredTopic is its topic from construction."""

        topic = help_topics.RegisteredTopic('foobar')

        self.assertEqual('foobar', topic.get_help_topic())

        topic = help_topics.RegisteredTopic('baz')

        self.assertEqual('baz', topic.get_help_topic())

class TestTopicIndex(TestHelp):

    """Tests for the HelpTopicIndex class."""

    def test_default_constructable(self):

        index = help_topics.HelpTopicIndex()

    def test_get_topics_None(self):

        """Searching for None returns the basic help topic."""

        index = help_topics.HelpTopicIndex()

        topics = index.get_topics(None)

        self.assertEqual(1, len(topics))

        self.assertIsInstance(topics[0], help_topics.RegisteredTopic)

        self.assertEqual('basic', topics[0].topic)

    def test_get_topics_topics(self):

        """Searching for a string returns the matching string."""

        index = help_topics.HelpTopicIndex()

        topics = index.get_topics('topics')

        self.assertEqual(1, len(topics))

        self.assertIsInstance(topics[0], help_topics.RegisteredTopic)

        self.assertEqual('topics', topics[0].topic)

    def test_get_topics_no_topic(self):

        """Searching for something not registered returns []."""

        index = help_topics.HelpTopicIndex()

        self.assertEqual([], index.get_topics('nothing by this name'))

    def test_prefix(self):

        """TopicIndex has a prefix of ''."""

        index = help_topics.HelpTopicIndex()

        self.assertEqual('', index.prefix)

class TestCommandIndex(TestHelp):

    """Tests for the HelpCommandIndex class."""

    def test_default_constructable(self):

        index = commands.HelpCommandIndex()

    def test_get_topics_None(self):

        """Searching for None returns an empty list."""

        index = commands.HelpCommandIndex()

        self.assertEqual([], index.get_topics(None))

    def test_get_topics_rocks(self):

        """Searching for 'rocks' returns the cmd_rocks command instance."""

        index = commands.HelpCommandIndex()

        topics = index.get_topics('rocks')

        self.assertEqual(1, len(topics))

        self.assertIsInstance(topics[0], builtins.cmd_rocks)

    def test_get_topics_no_topic(self):

        """Searching for something that is not a command returns []."""

        index = commands.HelpCommandIndex()

        self.assertEqual([], index.get_topics('nothing by this name'))

    def test_prefix(self):

        """CommandIndex has a prefix of 'commands/'."""

        index = commands.HelpCommandIndex()

        self.assertEqual('commands/', index.prefix)

    def test_get_topic_with_prefix(self):

        """Searching for commands/rocks returns the rocks command object."""

        index = commands.HelpCommandIndex()

        topics = index.get_topics('commands/rocks')

        self.assertEqual(1, len(topics))

        self.assertIsInstance(topics[0], builtins.cmd_rocks)

class TestHelpIndices(tests.TestCase):

    """Tests for the HelpIndices class."""

    def test_default_search_path(self):

        """The default search path should include internal indexs."""

        indices = help.HelpIndices()

        self.assertEqual(3, len(indices.search_path))

        # help topics should be searched in first.

        self.assertIsInstance(indices.search_path[0],

            help_topics.HelpTopicIndex)

        # with commands being search second.

        self.assertIsInstance(indices.search_path[1],

            commands.HelpCommandIndex)

        # and plugins are a third index.

        self.assertIsInstance(indices.search_path[2],

            plugin.PluginsHelpIndex)

    def test_search_for_unknown_topic_raises(self):

        """Searching for an unknown topic should raise NoHelpTopic."""

        indices = help.HelpIndices()

        indices.search_path = []

        error = self.assertRaises(errors.NoHelpTopic, indices.search, 'foo')

        self.assertEqual('foo', error.topic)

    def test_search_calls_get_topic(self):

        """Searching should call get_topics in all indexes in order."""

        calls = []

        class RecordingIndex(object):

            def __init__(self, name):

                self.prefix = name

            def get_topics(self, topic):

                calls.append(('get_topics', self.prefix, topic))

                return ['something']

        index = help.HelpIndices()

        index.search_path = [RecordingIndex('1'), RecordingIndex('2')]

        # try with None

        index.search(None)

        self.assertEqual([

            ('get_topics', '1', None),

            ('get_topics', '2', None),

            ],

            calls)

        # and with a string

        del calls[:]

        index.search('bar')

        self.assertEqual([

            ('get_topics', '1', 'bar'),

            ('get_topics', '2', 'bar'),

            ],

            calls)

    def test_search_returns_index_and_results(self):

        """Searching should return help topics with their index"""

        class CannedIndex(object):

            def __init__(self, prefix, search_result):

                self.prefix = prefix

                self.result = search_result

            def get_topics(self, topic):

                return self.result

        index = help.HelpIndices()

        index_one = CannedIndex('1', ['a'])

        index_two = CannedIndex('2', ['b', 'c'])

        index.search_path = [index_one, index_two]

        self.assertEqual([(index_one, 'a'), (index_two, 'b'), (index_two, 'c')],

            index.search(None))

    def test_search_checks_for_duplicate_prefixes(self):

        """Its an error when there are multiple indices with the same prefix."""

        indices = help.HelpIndices()

        indices.search_path = [help_topics.HelpTopicIndex(),

            help_topics.HelpTopicIndex()]

        self.assertRaises(errors.DuplicateHelpPrefix, indices.search, None)