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from BaseHTTPServer import (
HTTPServer,
BaseHTTPRequestHandler,
)
import httplib
import os
from signal import SIGKILL
import simplejson
from StringIO import StringIO
from unittest import TestCase
from urlparse import urlparse
from urlparse import parse_qs
from testtools import ExpectedException
from grackle.client import (
GrackleClient,
)
class ForkedFake:
def __init__(self, port, messages=None):
self.pid = None
self.port = port
self.messages = messages
self.read_end, self.write_end = os.pipe()
def is_ready(self):
os.write(self.write_end, 'asdf')
def __enter__(self):
pid = os.fork()
if pid == 0:
self.start_server()
self.pid = pid
os.read(self.read_end, 1)
return
def start_server(self):
service = HTTPServer(('', self.port), FakeGrackleRequestHandler)
service.messages = self.messages
self.is_ready()
service.serve_forever()
def __exit__(self, exc_type, exc_val, traceback):
os.kill(self.pid, SIGKILL)
class FakeGrackleRequestHandler(BaseHTTPRequestHandler):
def do_POST(self):
message = self.rfile.read(int(self.headers['content-length']))
if message == 'This is a message':
self.send_response(httplib.CREATED)
self.end_headers()
self.wfile.close()
else:
self.send_error(httplib.BAD_REQUEST)
def do_GET(self):
scheme, netloc, path, params, query_string, fragments = (
urlparse(self.path))
archive = os.path.split(path)[1]
query = parse_qs(query_string)
parameters = simplejson.loads(query['parameters'][0])
self.send_response(httplib.OK)
self.end_headers()
messages = [m for m in self.server.messages[archive] if 'message_ids'
not in parameters or m['message_id'] in
parameters['message_ids']]
limit = parameters.get('limit', 100)
memo = parameters.get('memo')
message_id_indices = dict(
(m['message_id'], idx) for idx, m in enumerate(messages))
if memo is None:
start = 0
else:
start = message_id_indices[memo.encode('rot13')]
if start > 0:
previous_memo = messages[start - 1]['message_id'].encode('rot13')
else:
previous_memo = None
end = min(start + limit, len(messages))
if end < len(messages):
next_memo = messages[end]['message_id'].encode('rot13')
else:
next_memo = None
messages = messages[start:end]
response = {
'messages': messages,
'next_memo': next_memo,
'previous_memo': previous_memo
}
self.wfile.write(simplejson.dumps(response))
def fake_grackle_service(client, messages=None):
if messages is None:
messages = {}
return ForkedFake(client.port, messages)
class TestPutMessage(TestCase):
def test_put_message(self):
client = GrackleClient('localhost', 8436)
with fake_grackle_service(client):
client.put_message('arch1', 'asdf', StringIO('This is a message'))
with ExpectedException(Exception, 'wtf'):
client.put_message('arch1', 'asdf',
StringIO('This is not a message'))
class TestGetMessages(TestCase):
def assertMessageIDs(self, ids, messages):
self.assertEqual(
sorted(ids), sorted(m['message_id'] for m in messages))
def test_get_messages(self):
client = GrackleClient('localhost', 8435)
with fake_grackle_service(client,
{'baz':
[{'message_id': 'foo'},
{'message_id': 'bar'}]}):
response = client.get_messages('baz')
self.assertEqual(['bar', 'foo'], sorted(m['message_id'] for m in
response['messages']))
self.assertIs(None, response['next_memo'])
self.assertIs(None, response['previous_memo'])
def test_get_messages_by_id(self):
client = GrackleClient('localhost', 8437)
with fake_grackle_service(client,
{'baz':
[{'message_id': 'foo'},
{'message_id': 'bar'}]}):
response = client.get_messages('baz', message_ids=['foo'])
message, = response['messages']
self.assertEqual('foo', message['message_id'])
def test_get_messages_batching(self):
client = GrackleClient('localhost', 8437)
with fake_grackle_service(client,
{'baz':
[{'message_id': 'foo'},
{'message_id': 'bar'}]}):
response = client.get_messages('baz', limit=1)
self.assertEqual(1, len(response['messages']))
messages = response['messages']
response = client.get_messages(
'baz', limit=1, memo=response['next_memo'])
self.assertEqual(1, len(response['messages']))
messages.extend(response['messages'])
self.assertMessageIDs(['foo', 'bar'], messages)
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