~didrocks/unity/altf10

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']]

        if 'order' in parameters:

            messages.sort(key=lambda m: m[parameters['order']])

        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 assertIDOrder(self, ids, messages):

        self.assertEqual(ids, [m['message_id'] for m in messages])

    def assertMessageIDs(self, ids, messages):

        self.assertIDOrder(

            sorted(ids), sorted(messages, key=lambda m:m['message_id']))

    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', 8438)

        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)

    def test_get_messages_date_order(self):

        client = GrackleClient('localhost', 8439)

        with fake_grackle_service(client,

                {'baz': [{'message_id': 'foo', 'date': '2011-03-25'},

                 {'message_id': 'bar', 'date': '2011-03-24'}]}):

            response = client.get_messages('baz')

            self.assertIDOrder(['foo', 'bar'], response['messages'])

            response = client.get_messages('baz', order='date')

            self.assertIDOrder(['bar', 'foo'], response['messages'])