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# Copyright (C) 2004, 2005, 2006, 2007 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
from bzrlib.tests import TestCase
from bzrlib.errors import SSHVendorNotFound, UnknownSSH
from bzrlib.transport.ssh import (
OpenSSHSubprocessVendor,
PLinkSubprocessVendor,
SSHCorpSubprocessVendor,
SSHVendorManager,
)
class TestSSHVendorManager(SSHVendorManager):
_ssh_version_string = ""
def set_ssh_version_string(self, version):
self._ssh_version_string = version
def _get_ssh_version_string(self, args):
return self._ssh_version_string
class SSHVendorManagerTests(TestCase):
def test_register_vendor(self):
manager = TestSSHVendorManager()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
vendor = object()
manager.register_vendor("vendor", vendor)
self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)
def test_default_vendor(self):
manager = TestSSHVendorManager()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
vendor = object()
manager.register_default_vendor(vendor)
self.assertIs(manager.get_vendor({}), vendor)
def test_get_vendor_by_environment(self):
manager = TestSSHVendorManager()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
self.assertRaises(UnknownSSH,
manager.get_vendor, {"BZR_SSH": "vendor"})
vendor = object()
manager.register_vendor("vendor", vendor)
self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)
def test_get_vendor_by_inspection_openssh(self):
manager = TestSSHVendorManager()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
manager.set_ssh_version_string("OpenSSH")
self.assertIsInstance(manager.get_vendor({}), OpenSSHSubprocessVendor)
def test_get_vendor_by_inspection_sshcorp(self):
manager = TestSSHVendorManager()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
manager.set_ssh_version_string("SSH Secure Shell")
self.assertIsInstance(manager.get_vendor({}), SSHCorpSubprocessVendor)
def test_get_vendor_by_inspection_plink(self):
manager = TestSSHVendorManager()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
manager.set_ssh_version_string("plink")
self.assertIsInstance(manager.get_vendor({}), PLinkSubprocessVendor)
def test_cached_vendor(self):
manager = TestSSHVendorManager()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
vendor = object()
manager.register_vendor("vendor", vendor)
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
# Once the vendor is found the result is cached (mainly because of the
# 'get_vendor' sometimes can be an expensive operation) and later
# invocations of the 'get_vendor' just returns the cached value.
self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)
self.assertIs(manager.get_vendor({}), vendor)
# The cache can be cleared by the 'clear_cache' method
manager.clear_cache()
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
def test_get_vendor_search_order(self):
# The 'get_vendor' method search for SSH vendors as following:
#
# 1. Check previously cached value
# 2. Check BZR_SSH environment variable
# 3. Check the system for known SSH vendors
# 4. Fall back to the default vendor if registered
#
# Let's now check the each check method in the reverse order
# clearing the cache between each invocation:
manager = TestSSHVendorManager()
# At first no vendors are found
self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
# If the default vendor is registered it will be returned
default_vendor = object()
manager.register_default_vendor(default_vendor)
self.assertIs(manager.get_vendor({}), default_vendor)
# If the known vendor is found in the system it will be returned
manager.clear_cache()
manager.set_ssh_version_string("OpenSSH")
self.assertIsInstance(manager.get_vendor({}), OpenSSHSubprocessVendor)
# If the BZR_SSH environment variable is found it will be treated as
# the vendor name
manager.clear_cache()
vendor = object()
manager.register_vendor("vendor", vendor)
self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)
# Last cached value always checked first
self.assertIs(manager.get_vendor({}), vendor)
class SubprocessVendorsTests(TestCase):
def test_openssh_command_arguments(self):
vendor = OpenSSHSubprocessVendor()
self.assertEqual(
vendor._get_vendor_specific_argv(
"user", "host", 100, command=["bzr"]),
["ssh", "-oForwardX11=no", "-oForwardAgent=no",
"-oClearAllForwardings=yes", "-oProtocol=2",
"-oNoHostAuthenticationForLocalhost=yes",
"-p", "100",
"-l", "user",
"host", "bzr"]
)
def test_openssh_subsystem_arguments(self):
vendor = OpenSSHSubprocessVendor()
self.assertEqual(
vendor._get_vendor_specific_argv(
"user", "host", 100, subsystem="sftp"),
["ssh", "-oForwardX11=no", "-oForwardAgent=no",
"-oClearAllForwardings=yes", "-oProtocol=2",
"-oNoHostAuthenticationForLocalhost=yes",
"-p", "100",
"-l", "user",
"-s", "host", "sftp"]
)
def test_sshcorp_command_arguments(self):
vendor = SSHCorpSubprocessVendor()
self.assertEqual(
vendor._get_vendor_specific_argv(
"user", "host", 100, command=["bzr"]),
["ssh", "-x",
"-p", "100",
"-l", "user",
"host", "bzr"]
)
def test_sshcorp_subsystem_arguments(self):
vendor = SSHCorpSubprocessVendor()
self.assertEqual(
vendor._get_vendor_specific_argv(
"user", "host", 100, subsystem="sftp"),
["ssh", "-x",
"-p", "100",
"-l", "user",
"-s", "sftp", "host"]
)
def test_plink_command_arguments(self):
vendor = PLinkSubprocessVendor()
self.assertEqual(
vendor._get_vendor_specific_argv(
"user", "host", 100, command=["bzr"]),
["plink", "-x", "-a", "-ssh", "-2",
"-P", "100",
"-l", "user",
"host", "bzr"]
)
def test_plink_subsystem_arguments(self):
vendor = PLinkSubprocessVendor()
self.assertEqual(
vendor._get_vendor_specific_argv(
"user", "host", 100, subsystem="sftp"),
["plink", "-x", "-a", "-ssh", "-2",
"-P", "100",
"-l", "user",
"-s", "host", "sftp"]
)
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