~bzr-pqm/bzr/bzr.dev

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# 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

import os
import sys

import bzrlib.errors
from bzrlib.selftest.testrevision import make_branches
from bzrlib.trace import mutter
from bzrlib.branch import Branch
from bzrlib.fetch import greedy_fetch

from bzrlib.selftest import TestCaseInTempDir


def has_revision(branch, revision_id):
    try:
        branch.get_revision_xml_file(revision_id)
        return True
    except bzrlib.errors.NoSuchRevision:
        return False

def fetch_steps(self, br_a, br_b, writable_a):
    """A foreign test method for testing fetch locally and remotely."""
    def new_branch(name):
        os.mkdir(name)
        return Branch.initialize(name)
            
    assert not has_revision(br_b, br_a.revision_history()[3])
    assert has_revision(br_b, br_a.revision_history()[2])
    assert len(br_b.revision_history()) == 7
    assert greedy_fetch(br_b, br_a, br_a.revision_history()[2])[0] == 0

    # greedy_fetch is not supposed to alter the revision history
    assert len(br_b.revision_history()) == 7
    assert not has_revision(br_b, br_a.revision_history()[3])

    assert len(br_b.revision_history()) == 7
    assert greedy_fetch(br_b, br_a, br_a.revision_history()[3])[0] == 1
    assert has_revision(br_b, br_a.revision_history()[3])
    assert not has_revision(br_a, br_b.revision_history()[6])
    assert has_revision(br_a, br_b.revision_history()[5])

    # When a non-branch ancestor is missing, it should be a failure, not
    # exception
    print ("CANNOT TEST MISSING NON REVISION_HISTORY ANCESTORS WITHOUT"
           " GHOSTS")
#    br_a4 = new_branch('br_a4')
#    count, failures = greedy_fetch(br_a4, br_a)
#    self.assertEqual(count, 6)
#    self.assertEqual(failures, set((br_b.revision_history()[4],
#                                    br_b.revision_history()[5]))) 

    self.assertEqual(greedy_fetch(writable_a, br_b)[0], 1)
    assert has_revision(br_a, br_b.revision_history()[3])
    assert has_revision(br_a, br_b.revision_history()[4])
        
    br_b2 = new_branch('br_b2')
    assert greedy_fetch(br_b2, br_b)[0] == 7
    assert has_revision(br_b2, br_b.revision_history()[4])
    assert has_revision(br_b2, br_a.revision_history()[2])
    assert not has_revision(br_b2, br_a.revision_history()[3])

    br_a2 = new_branch('br_a2')
    assert greedy_fetch(br_a2, br_a)[0] == 9
    assert has_revision(br_a2, br_b.revision_history()[4])
    assert has_revision(br_a2, br_a.revision_history()[3])
    assert has_revision(br_a2, br_a.revision_history()[2])

    br_a3 = new_branch('br_a3')
    assert greedy_fetch(br_a3, br_a2)[0] == 0
    for revno in range(4):
        assert not has_revision(br_a3, br_a.revision_history()[revno])
    self.assertEqual(greedy_fetch(br_a3, br_a2, br_a.revision_history()[2])[0], 3)
    fetched = greedy_fetch(br_a3, br_a2, br_a.revision_history()[3])[0]
    assert fetched == 3, "fetched %d instead of 3" % fetched
    # InstallFailed should be raised if the branch is missing the revision
    # that was requested.
    self.assertRaises(bzrlib.errors.InstallFailed, greedy_fetch, br_a3,
                      br_a2, 'pizza')
    # InstallFailed should be raised if the branch is missing a revision
    # from its own revision history
    br_a2.append_revision('a-b-c')
    self.assertRaises(bzrlib.errors.InstallFailed, greedy_fetch, br_a3,
                      br_a2)


class TestFetch(TestCaseInTempDir):

    def test_fetch(self):
        
        #highest indices a: 5, b: 7
        br_a, br_b = make_branches()
        fetch_steps(self, br_a, br_b, br_a)