Do not ask user to press Fail button if pixmap to texture test fails because GLX is older than 1.3.

client/site_tests/graphics_TearTest/graphics_TearTest.py

 # 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.
 
 import logging, os
 
 from autotest_lib.client.bin import site_login, site_ui_test
 from autotest_lib.client.common_lib import error, site_ui, utils
 
 
@@ skipping 43 matching lines @@
             dialog = site_ui.Dialog(question=TEMPLATE.format(header, tests),
                                     choices=[])
             result = dialog.get_result()
 
             header = html_button('Restart')
 
             # Run testcases from tests array.
             for test in tests:
                 cmd = test['cmd']
                 logging.info("command launched: %s" % cmd)
-                utils.system(site_ui.xcommand(cmd))
+                ret = utils.system(site_ui.xcommand(cmd), ignore_status=True)
 
-                test['result'] = html_button('Pass') + html_button('Fail')
-                dialog = site_ui.Dialog(question=TEMPLATE.format(header, tests),
-                                        choices=[])
-                # Store user's response if the testcase passed or failed.
-                result = dialog.get_result()
-                test['result'] = result if result else 'Timeout'
+                if ret == 0:
+                    test['result'] = html_button('Pass') + html_button('Fail')
+                    dialog = site_ui.Dialog(
+                        question=TEMPLATE.format(header, tests), choices=[])
+                    # Store user's response if the testcase passed or failed.
+                    result = dialog.get_result()
+                    test['result'] = result if result else 'Timeout'
+                else:
+                    # If test return nonzero status, mark it as failed.
+                    test['result'] = 'Fail'
 
             # Test passed if all testcases passed.
             passed = all(test['result'] == 'Pass' for test in tests)
             header = ("Test %s.<br/>" % ("passed" if passed else "failed") +
                       html_button('Done') + html_button('Restart'))
             # Show the summary screen.
             dialog = site_ui.Dialog(question=TEMPLATE.format(header, tests),
                                     choices=[])
             result = dialog.get_result()
 
             # If user chose 'Restart', run the whole thing again.
             if result != 'Restart':
                 break
 
         if not passed:
             raise error.TestFail('Failed: ' +
                 ', '.join(test['desc'] for test in tests
                           if test['result'] != 'Pass'))