'verify that intf.config is correctly limiting traffic'

def testIntfOptions(self):

    p = pexpect.spawn('python    -m    mininet.examples.intfoptions    ')
    tolerance = 0.2
    opts = ["Results:    \\['([\\d\\.]+)    .bits/sec", "Results:    \\['10M',    '([\\d\\.]+)    .bits/sec", 'h(\\d+)->h(\\d+):    (\\d)/(\\d),rtt    min/avg/max/mdev    ([\\d\\.]+)/([\\d\\.]+)/([\\d\\.]+)/([\\d\\.]+)    ms', pexpect.EOF]
    while True:
        index = p.expect(opts, timeout=600)
        if (index == 0):
            BW = 5
            bw = float(p.match.group(1))
            self.assertGreaterEqual(bw, (BW * (1 - tolerance)))
            self.assertLessEqual(bw, (BW * (1 + tolerance)))
        elif (index == 1):
            BW = 10
            measuredBw = float(p.match.group(1))
            loss = ((measuredBw / BW) * 100)
            self.assertGreaterEqual(loss, (50 * (1 - tolerance)))
            self.assertLessEqual(loss, (50 * (1 + tolerance)))
        elif (index == 2):
            delay = float(p.match.group(6))
            self.assertGreaterEqual(delay, (15 * (1 - tolerance)))
            self.assertLessEqual(delay, (15 * (1 + tolerance)))
        else:
            break
