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Adds @mathom's placebo decorator work
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Rich Jones
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Feb 26, 2016
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import placebo | ||
import boto3 | ||
import os | ||
import functools | ||
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PLACEBO_DIR = os.path.join(os.path.dirname(__file__), 'placebo') | ||
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def placebo_session(function): | ||
""" | ||
Decorator to help do testing with placebo. | ||
Simply wrap the function you want to test and make sure to add | ||
a "session" argument so the decorator can pass the placebo session. | ||
Accepts the following environment variables to configure placebo: | ||
PLACEBO_MODE: set to "record" to record AWS calls and save them | ||
PLACEBO_PROFILE: optionally set an AWS credential profile to record with | ||
""" | ||
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@functools.wraps(function) | ||
def wrapper(*args, **kwargs): | ||
session_kwargs = { | ||
'region_name': os.environ.get('AWS_DEFAULT_REGION', 'us-east-1') | ||
} | ||
profile_name = os.environ.get('PLACEBO_PROFILE', None) | ||
if profile_name: | ||
session_kwargs['profile_name'] = profile_name | ||
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session = boto3.Session(**session_kwargs) | ||
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self = args[0] | ||
prefix = self.__class__.__name__ + '.' + function.__name__ | ||
record_dir = os.path.join(PLACEBO_DIR, prefix) | ||
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if not os.path.exists(record_dir): | ||
os.makedirs(record_dir) | ||
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pill = placebo.attach(session, data_path=record_dir) | ||
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if os.environ.get('PLACEBO_MODE') == 'record': | ||
pill.record() | ||
else: | ||
pill.playback() | ||
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kwargs['session'] = session | ||
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return function(*args, **kwargs) | ||
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return wrapper |
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import unittest | ||
import os | ||
import shutil | ||
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import boto3 | ||
import mock | ||
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from placebo.utils import placebo_session | ||
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class TestUtils(unittest.TestCase): | ||
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def setUp(self): | ||
self.environ = {} | ||
self.environ_patch = mock.patch('os.environ', self.environ) | ||
self.environ_patch.start() | ||
credential_path = os.path.join(os.path.dirname(__file__), 'cfg', | ||
'aws_credentials') | ||
self.environ['AWS_SHARED_CREDENTIALS_FILE'] = credential_path | ||
self.environ['PLACEBO_MODE'] = 'record' | ||
self.session = boto3.Session(profile_name='foobar', | ||
region_name='us-west-2') | ||
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@placebo_session | ||
def test_decorator(self, session): | ||
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# Tear it up.. | ||
PLACEBO_TEST_DIR = os.path.join(os.getcwd(),'placebo', 'placebo') | ||
prefix = 'TestUtils.test_decorator' | ||
record_dir = os.path.join(PLACEBO_TEST_DIR, prefix) | ||
self.assertTrue(os.path.exists(record_dir)) | ||
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# Tear it down.. | ||
shutil.rmtree(PLACEBO_TEST_DIR) |