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bzrlib/tests/test_treebuilder.py
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# Copyright (C) 2006 Canonical Ltd
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# Authors:  Robert Collins <robert.collins@canonical.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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"""Tests for the TreeBuilder helper class."""
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from bzrlib import errors, tests
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from bzrlib.memorytree import MemoryTree
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from bzrlib.tests import TestCaseWithTransport
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from bzrlib.treebuilder import TreeBuilder
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class FakeTree(object):
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    """A pretend tree to test the calls made by TreeBuilder."""
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    def __init__(self):
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        self._calls = []
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    def lock_tree_write(self):
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        self._calls.append("lock_tree_write")
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    def unlock(self):
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        self._calls.append("unlock")
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class TestFakeTree(TestCaseWithTransport):
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    def testFakeTree(self):
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        """Check that FakeTree works as required for the TreeBuilder tests."""
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        tree = FakeTree()
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        self.assertEqual([], tree._calls)
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        tree.lock_tree_write()
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        self.assertEqual(["lock_tree_write"], tree._calls)
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        tree.unlock()
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        self.assertEqual(["lock_tree_write", "unlock"], tree._calls)
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class TestTreeBuilderMemoryTree(tests.TestCaseWithMemoryTransport):
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    def test_create(self):
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        builder = TreeBuilder()
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    def test_start_tree_locks_write(self):
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        builder = TreeBuilder()
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        tree = FakeTree()
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        builder.start_tree(tree)
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        self.assertEqual(["lock_tree_write"], tree._calls)
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    def test_start_tree_when_started_fails(self):
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        builder = TreeBuilder()
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        tree = FakeTree()
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        builder.start_tree(tree)
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        self.assertRaises(errors.AlreadyBuilding, builder.start_tree, tree)
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    def test_finish_tree_not_started_errors(self):
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        builder = TreeBuilder()
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        self.assertRaises(errors.NotBuilding, builder.finish_tree)
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    def test_finish_tree_unlocks(self):
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        builder = TreeBuilder()
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        tree = FakeTree()
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        builder.start_tree(tree)
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        builder.finish_tree()
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        self.assertEqual(["lock_tree_write", "unlock"], tree._calls)
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    def test_build_tree_not_started_errors(self):
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        builder = TreeBuilder()
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        self.assertRaises(errors.NotBuilding, builder.build, "foo")
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    def test_build_tree(self):
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        """Test building works using a MemoryTree."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        builder = TreeBuilder()
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        builder.start_tree(tree)
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        builder.build(['foo', "bar/", "bar/file"])
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        self.assertEqual('contents of foo\n',
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            tree.get_file(tree.path2id('foo')).read())
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        self.assertEqual('contents of bar/file\n',
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            tree.get_file(tree.path2id('bar/file')).read())
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        builder.finish_tree()
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