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#!/usr/bin/env python
#
# Copyright 2016 - The Android Open Source Project
#
# 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.
"""Tests for acloud.internal.lib.utils."""
import getpass
import os
import subprocess
import time
import mock
import unittest
from acloud.internal.lib import driver_test_lib
from acloud.internal.lib import utils
class UtilsTest(driver_test_lib.BaseDriverTest):
def testCreateSshKeyPair_KeyAlreadyExists(self):
"""Test when the key pair already exists."""
public_key = "/fake/public_key"
private_key = "/fake/private_key"
self.Patch(os.path, "exists", side_effect=lambda path: path == public_key)
self.Patch(subprocess, "check_call")
utils.CreateSshKeyPairIfNotExist(private_key, public_key)
self.assertEqual(subprocess.check_call.call_count, 0)
def testCreateSshKeyPair_KeyAreCreated(self):
"""Test when the key pair created."""
public_key = "/fake/public_key"
private_key = "/fake/private_key"
self.Patch(os.path, "exists", return_value=False)
self.Patch(subprocess, "check_call")
self.Patch(os, "rename")
utils.CreateSshKeyPairIfNotExist(private_key, public_key)
self.assertEqual(subprocess.check_call.call_count, 1)
subprocess.check_call.assert_called_with(
utils.SSH_KEYGEN_CMD + ["-C", getpass.getuser(), "-f", private_key],
stdout=mock.ANY, stderr=mock.ANY)
def testRetryOnException(self):
def _IsValueError(exc):
return isinstance(exc, ValueError)
num_retry = 5
@utils.RetryOnException(_IsValueError, num_retry)
def _RaiseAndRetry(sentinel):
sentinel.alert()
raise ValueError("Fake error.")
sentinel = mock.MagicMock()
self.assertRaises(ValueError, _RaiseAndRetry, sentinel)
self.assertEqual(1 + num_retry, sentinel.alert.call_count)
def testRetryExceptionType(self):
"""Test RetryExceptionType function."""
def _RaiseAndRetry(sentinel):
sentinel.alert()
raise ValueError("Fake error.")
num_retry = 5
sentinel = mock.MagicMock()
self.assertRaises(ValueError, utils.RetryExceptionType,
(KeyError, ValueError), num_retry, _RaiseAndRetry,
sentinel=sentinel)
self.assertEqual(1 + num_retry, sentinel.alert.call_count)
def testRetry(self):
"""Test Retry."""
self.Patch(time, "sleep")
def _RaiseAndRetry(sentinel):
sentinel.alert()
raise ValueError("Fake error.")
num_retry = 5
sentinel = mock.MagicMock()
self.assertRaises(ValueError, utils.RetryExceptionType,
(ValueError, KeyError), num_retry, _RaiseAndRetry,
sleep_multiplier=1,
retry_backoff_factor=2,
sentinel=sentinel)
self.assertEqual(1 + num_retry, sentinel.alert.call_count)
time.sleep.assert_has_calls(
[mock.call(1), mock.call(2), mock.call(4), mock.call(8), mock.call(16)])
if __name__ == "__main__":
unittest.main()
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