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# Copyright 2014 Microsoft Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Requires Python 2.4+ and Openssl 1.0+
#
from tests.tools import *
from azurelinuxagent.common.exception import *
from azurelinuxagent.common.protocol import get_protocol_util, \
TAG_FILE_NAME
@patch("time.sleep")
class TestProtocolUtil(AgentTestCase):
@patch("azurelinuxagent.common.protocol.util.MetadataProtocol")
@patch("azurelinuxagent.common.protocol.util.WireProtocol")
def test_detect_protocol(self, WireProtocol, MetadataProtocol, _):
WireProtocol.return_value = MagicMock()
MetadataProtocol.return_value = MagicMock()
protocol_util = get_protocol_util()
protocol_util.dhcp_handler = MagicMock()
protocol_util.dhcp_handler.endpoint = "foo.bar"
#Test wire protocol is available
protocol = protocol_util.get_protocol()
self.assertEquals(WireProtocol.return_value, protocol)
#Test wire protocol is not available
protocol_util.clear_protocol()
WireProtocol.return_value.detect.side_effect = ProtocolError()
protocol = protocol_util.get_protocol()
self.assertEquals(MetadataProtocol.return_value, protocol)
#Test no protocol is available
protocol_util.clear_protocol()
WireProtocol.return_value.detect.side_effect = ProtocolError()
MetadataProtocol.return_value.detect.side_effect = ProtocolError()
self.assertRaises(ProtocolError, protocol_util.get_protocol)
def test_detect_protocol_by_file(self, _):
protocol_util = get_protocol_util()
protocol_util._detect_wire_protocol = Mock()
protocol_util._detect_metadata_protocol = Mock()
tag_file = os.path.join(self.tmp_dir, TAG_FILE_NAME)
#Test tag file doesn't exist
protocol_util.get_protocol_by_file()
protocol_util._detect_wire_protocol.assert_any_call()
protocol_util._detect_metadata_protocol.assert_not_called()
#Test tag file exists
protocol_util.clear_protocol()
protocol_util._detect_wire_protocol.reset_mock()
protocol_util._detect_metadata_protocol.reset_mock()
with open(tag_file, "w+") as tag_fd:
tag_fd.write("")
protocol_util.get_protocol_by_file()
protocol_util._detect_metadata_protocol.assert_any_call()
protocol_util._detect_wire_protocol.assert_not_called()
if __name__ == '__main__':
unittest.main()
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