def init(cls):
     "Initialize Mininet"
     if cls.inited:
         return
     ensureRoot()
     fixLimits()
     cls.inited = True

def runTests( testDir, verbosity=1 ):
    "discover and run all tests in testDir"
    # ensure root and cleanup before starting tests
    ensureRoot()
    cleanup()
    # discover all tests in testDir
    testSuite = unittest.defaultTestLoader.discover( testDir )
    # run tests
    MininetTestRunner( verbosity=verbosity ).run( testSuite )

def runTests( testDir, verbosity=1 ):
    "discover and run all tests in testDir"
    # ensure root and cleanup before starting tests
    ensureRoot()
    cleanup()
    # discover all tests in testDir
    testSuite = unittest.defaultTestLoader.discover( testDir )
    # run tests
    success = MininetTestRunner( verbosity=verbosity ).run( testSuite ).wasSuccessful()
    sys.exit( 0 if success else 1 )

def runTests(testDir, verbosity=1, dockeronly=False):
    "discover and run all tests in testDir"
    # ensure root and cleanup before starting tests
    ensureRoot()
    cleanup()
    # discover all tests in testDir
    testSuite = defaultTestLoader.discover(testDir)
    if dockeronly:
        testSuiteFiltered = [s for s in testSuite if "Docker" in str(s)]
        testSuite = TestSuite()
        testSuite.addTests(testSuiteFiltered)

    # run tests
    TextTestRunner(verbosity=verbosity).run(testSuite)

from mininet.net import Mininet
from mininet.node import Host
from mininet.link import Link
from mininet.cli import CLI
from mininet.util import dumpNodeConnections
from mininet.util import ensureRoot

from subprocess import Popen, PIPE
from time import sleep, time

import sys
import os
import math
import requests

ensureRoot()

class ProtoTester(Topo):
    def __init__(self):

        # Initialise topology
        Topo.__init__(self)

        # Add hosts and switches
        sender = self.addHost('sender', ip='10.0.1.1', mac='00:00:00:00:00:01')
        LTE = self.addHost('LTE', ip='0.0.0.0')
        receiver = self.addHost('receiver', ip='10.0.1.2', mac='00:00:00:00:00:02')

        s1 = self.addSwitch('s1')
        s2 = self.addSwitch('s2')