MongoDB with no disk file persist

partial_flaskr_tests.py

import socket
from time import sleep
import os
import unittest
import tempfile
from subprocess import Popen, PIPE

from flask import url_for

import flaskr

def is_open(ip,port):
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    try:
        s.connect((ip, int(port)))
        s.shutdown(2)
        return True
    except:
        return False

class FlaskrTestCase(unittest.TestCase):

    @classmethod
    def setUpClass(self):
        try:
            os.mkdir('test_db')
        except Exception, e:
            pass
        self.mongod = Popen(['mongod', '--smallfiles', '--noprealloc', '--syncdelay', '0', '--nojournal', '--dbpath', 'test_db' ], stdout=PIPE)
        while not is_open('localhost', 27017):
            sleep(0.1)

    @classmethod
    def tearDownClass(self):
        self.mongod.terminate()
        while is_open('localhost', 27017):
            sleep(0.1)