def exportValue(self, vf, value):
        m = StrStrHashMap(value)
        keysAndValues = []
        for i in m.keys():
            keysAndValues.append(i)
            keysAndValues.append(m[i])
def test_disk_usage_sensor_is_stateless():
    sensor = disk_usage.DiskUsage()
    ok_([] != sensor.measure())