python-docs-samples/tests/utils.py at master · kbanggithub/python-docs-samples · GitHub

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# 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.

"""

Common testing utilities between samples

"""

import contextlib

import os

import sys

import tempfile

import unittest

import httplib2

from nose.plugins.skip import SkipTest

from six.moves import cStringIO

try:

APPENGINE_AVAILABLE = True

from google.appengine.datastore import datastore_stub_util

from google.appengine.ext import testbed

from google.appengine.api import namespace_manager

except ImportError:

APPENGINE_AVAILABLE = False

RESOURCE_PATH = os.path.join(

os.path.abspath(os.path.dirname(__file__)), 'resources')

PROJECT_ID_ENV_VAR = 'TEST_PROJECT_ID'

BUCKET_NAME_ENV_VAR = 'TEST_BUCKET_NAME'

class CloudBaseTest(unittest.TestCase):

def setUp(self):

self.resource_path = RESOURCE_PATH

self.project_id = os.environ.get(PROJECT_ID_ENV_VAR)

if not self.project_id:

raise EnvironmentError(

'You must set the {} environment variable to a valid Google '

'Cloud project ID.'.format(PROJECT_ID_ENV_VAR))

self.bucket_name = os.environ.get(BUCKET_NAME_ENV_VAR)

if not self.bucket_name:

raise EnvironmentError(

'You must set the {} environment variable to a valid Google '

'Cloud Storage bucket.'.format(BUCKET_NAME_ENV_VAR))

class AppEngineTestbedCase(CloudBaseTest):

"""A base test case for common setup/teardown tasks for test."""

def setUp(self):

super(AppEngineTestbedCase, self).setUp()

if not APPENGINE_AVAILABLE:

raise SkipTest()

# A hack to prevent get_application_default from going GAE route.

self._server_software_org = os.environ.get('SERVER_SOFTWARE')

os.environ['SERVER_SOFTWARE'] = ''

# Setup the datastore and memcache stub.

# First, create an instance of the Testbed class.

self.testbed = testbed.Testbed()

# Then activate the testbed, which prepares the service stubs for

# use.

self.testbed.activate()

# Create a consistency policy that will simulate the High

# Replication consistency model.

self.policy = datastore_stub_util.PseudoRandomHRConsistencyPolicy(

probability=0)

# Initialize the datastore stub with this policy.

self.testbed.init_datastore_v3_stub(

datastore_file=tempfile.mkstemp()[1],

consistency_policy=self.policy)

self.testbed.init_memcache_stub()

# Setup remaining stubs.

self.testbed.init_app_identity_stub()

self.testbed.init_blobstore_stub()

self.testbed.init_user_stub()

self.testbed.init_taskqueue_stub(root_path='tests/resources')

self.taskqueue_stub = self.testbed.get_stub(

testbed.TASKQUEUE_SERVICE_NAME)

self.testbed.init_logservice_stub()

def tearDown(self):

super(AppEngineTestbedCase, self).tearDown()

if self._server_software_org:

os.environ['SERVER_SOFTWARE'] = self._server_software_org

self.testbed.deactivate()

def loginUser(self, email='user@example.com', id='123', is_admin=False):

self.testbed.setup_env(

user_email=email,

user_id=id,

user_is_admin='1' if is_admin else '0',

overwrite=True)

def runTasks(self):

tasks = self.taskqueue_stub.get_filtered_tasks()

for task in tasks:

namespace = task.headers.get('X-AppEngine-Current-Namespace', '')

previous_namespace = namespace_manager.get_namespace()

try:

namespace_manager.set_namespace(namespace)

self.app.post(

task.url,

task.extract_params(),

headers={

k: v for k, v in task.headers.iteritems()

if k.startswith('X-AppEngine')})

finally:

namespace_manager.set_namespace(previous_namespace)

@contextlib.contextmanager

def capture_stdout():

"""Capture stdout to a StringIO object."""

fake_stdout = cStringIO()

old_stdout = sys.stdout

try:

sys.stdout = fake_stdout

yield fake_stdout

finally:

sys.stdout = old_stdout

class Http2Mock(object):

"""Mock httplib2.Http"""

def __init__(self, responses):

self.responses = responses

def add_credentials(self, user, pwd):

self.credentials = (user, pwd)

def request(self, token_uri, method, body, headers=None, *args, **kwargs):

response = self.responses.pop(0)

self.status = response.get('status', 200)

self.body = response.get('body', '')

self.headers = response.get('headers', '')

return (self, self.body)

def __enter__(self):

self.httplib2_orig = httplib2.Http

httplib2.Http = self

return self

def __exit__(self, exc_type, exc_value, traceback):

httplib2.Http = self.httplib2_orig

def __call__(self, *args, **kwargs):

return self

python-docs-samples/tests/utils.py at master · kbanggithub/python-docs-samples · GitHub

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