# Copyright (C) 2020 Jelmer Vernooij <jelmer@jelmer.uk>
#
# 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 tree transform."""

import os

from ...transform import ROOT_PARENT, conflict_pass, resolve_conflicts, revert
from . import TestCaseWithTransport


class GitTransformTests(TestCaseWithTransport):
    def test_directory_exists(self):
        tree = self.make_branch_and_tree(".", format="git")
        tt = tree.transform()
        dir1 = tt.new_directory("dir", ROOT_PARENT)
        tt.new_file("name1", dir1, [b"content1"])
        dir2 = tt.new_directory("dir", ROOT_PARENT)
        tt.new_file("name2", dir2, [b"content2"])
        raw_conflicts = resolve_conflicts(tt, None, lambda t, c: conflict_pass(t, c))
        conflicts = tt.cook_conflicts(raw_conflicts)
        self.assertEqual([], list(conflicts))
        tt.apply()
        self.assertEqual({"name1", "name2"}, set(os.listdir("dir")))

    def test_revert_does_not_remove(self):
        tree = self.make_branch_and_tree(".", format="git")
        tt = tree.transform()
        dir1 = tt.new_directory("dir", ROOT_PARENT)
        tid = tt.new_file("name1", dir1, [b"content1"])
        tt.version_file(tid)
        tt.apply()
        tree.commit("start")
        with open("dir/name1", "wb") as f:
            f.write(b"new content2")
        revert(tree, tree.basis_tree())
        self.assertEqual([], list(tree.iter_changes(tree.basis_tree())))
