Make test failure messages more verbose (and thus useful to testing operators).

client/site_tests/hardware_GPIOSwitches/hardware_GPIOSwitches.py

+# -*- coding: utf-8 -*-
+#
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 __author__ = 'nsanders@chromium.org (Nick Sanders)'
 
 import logging, os
 
 from autotest_lib.client.bin import test, utils
 from autotest_lib.client.common_lib import error
 
 class hardware_GPIOSwitches(test.test):
     version = 1
 
 
     def init_sku_table(self):
         self.sku_table = {
             # SKU: gpio_read, recovery GPIO, developer mode,
             # firmware writeprotect
             'atom-proto': {'gpio_read': self.acpi_gpio_read}
             }
 
     def initialize(self, gpio_root='/home/gpio'):
         # setup gpio's for reading.  Must re-create after each POR
         if os.path.exists(gpio_root):
             utils.system("rm -rf %s" % gpio_root)
         utils.system("mkdir %s" % (gpio_root))
-        utils.system("/usr/sbin/gpio_setup")
+        try:
+            utils.system("/usr/sbin/gpio_setup")
+        except error.CmdError:
+            raise error.TestNAError('GPIO setup failed\nGPIO 設定失敗')
         self._gpio_root=gpio_root
 
     def run_once(self):
         self.init_sku_table()
 
         # TODO(nsanders): Detect actual system type here by HWQual ID (?)
         # and redirect to the correct check.
         # We're just checking for any Atom here, and hoping for the best.
         try:
           utils.system('cat /proc/cpuinfo | grep "model name" | '
@@ skipping 13 matching lines @@
 
         keyvals = {}
         keyvals['level_recovery'] = self.gpio_read('recovery_button')
         keyvals['level_developer'] = self.gpio_read('developer_switch')
         keyvals['level_firmware_writeprotect'] = self.gpio_read('write_protect')
 
         self.write_perf_keyval(keyvals)
 
     def acpi_gpio_read(self, name):
         return int(utils.system_output("cat %s/%s" % (self._gpio_root, name)))