# Copyright (C) 2008 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 Repository.add_fallback_repository."""

from breezy import errors
from breezy.revision import NULL_REVISION
from breezy.tests import TestNotApplicable
from breezy.tests.per_repository import TestCaseWithRepository


class TestAddFallbackRepository(TestCaseWithRepository):
    def test_add_fallback_repository(self):
        repo = self.make_repository("repo")
        tree = self.make_branch_and_tree("branch")
        if not repo._format.supports_external_lookups:
            self.assertRaises(
                errors.UnstackableRepositoryFormat,
                repo.add_fallback_repository,
                tree.branch.repository,
            )
            raise TestNotApplicable
        repo.add_fallback_repository(tree.branch.repository)
        # the repository has been added correctly if we can query against it.
        revision_id = tree.commit("1st post")
        repo.lock_read()
        self.addCleanup(repo.unlock)
        # can see all revisions
        self.assertEqual({revision_id}, set(repo.all_revision_ids()))
        # and can also query the parent map, either on the revisions
        # versionedfiles, which works in tuple keys...
        self.assertEqual(
            {(revision_id,): ()}, repo.revisions.get_parent_map([(revision_id,)])
        )
        # ... or on the repository directly...
        self.assertEqual(
            {revision_id: (NULL_REVISION,)}, repo.get_parent_map([revision_id])
        )
        # ... or on the repository's graph.
        self.assertEqual(
            {revision_id: (NULL_REVISION,)},
            repo.get_graph().get_parent_map([revision_id]),
        )
        # ... or on the repository's graph, when there is an other repository.
        other = self.make_repository("other")
        other.lock_read()
        self.addCleanup(other.unlock)
        self.assertEqual(
            {revision_id: (NULL_REVISION,)},
            repo.get_graph(other).get_parent_map([revision_id]),
        )
