test_adb.py: silence ResourceWarning.

import threading

import time

import unittest

import warnings

@contextlib.contextmanager

                                stderr=subprocess.STDOUT)

        try:

            # We get warnings for unclosed files for the subprocess's pipes,

            # and it's somewhat cumbersome to close them, so just ignore this.

            warnings.simplefilter("ignore", ResourceWarning)

            # Run the adb client and have it start the adb server.

            proc = subprocess.Popen(["adb", "-P", str(port), "start-server"],

                                    stdin=subprocess.PIPE,