Reland of Android: Trust large random numbers for temp files

build/android/devil/android/device_temp_file_test.py

Index: build/android/devil/android/device_temp_file_test.py
diff --git a/build/android/devil/android/device_temp_file_test.py b/build/android/devil/android/device_temp_file_test.py
deleted file mode 100755
index 76f9cc8ec0179984831eff7fd3028299487fc3e3..0000000000000000000000000000000000000000
--- a/build/android/devil/android/device_temp_file_test.py
+++ /dev/null
@@ -1,91 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""
-Unit tests for the contents of device_temp_file.py.
-"""
-
-import logging
-import os
-import sys
-import unittest
-
-from devil.android import device_errors
-from devil.android import device_temp_file
-from devil.android.sdk import adb_wrapper
-from devil.utils import mock_calls
-from pylib import constants
-
-sys.path.append(os.path.join(
-    constants.DIR_SOURCE_ROOT, 'third_party', 'pymock'))
-import mock # pylint: disable=F0401
-
-class DeviceTempFileTest(mock_calls.TestCase):
-
-  def setUp(self):
-    test_serial = '0123456789abcdef'
-    self.adb = mock.Mock(spec=adb_wrapper.AdbWrapper)
-    self.adb.__str__ = mock.Mock(return_value=test_serial)
-    self.watchMethodCalls(self.call.adb)
-
-  def mockShellCall(self, cmd_prefix, action=''):
-    """Expect an adb.Shell(cmd) call with cmd_prefix and do some action
-
-    Args:
-      cmd_prefix: A string, the cmd of the received call is expected to have
-          this as a prefix.
-      action: If callable, an action to perform when the expected call is
-          received, otherwise a return value.
-    Returns:
-      An (expected_call, action) pair suitable for use in assertCalls.
-    """
-    def check_and_return(cmd):
-      self.assertTrue(
-          cmd.startswith(cmd_prefix),
-          'command %r does not start with prefix %r' % (cmd, cmd_prefix))
-      if callable(action):
-        return action(cmd)
-      else:
-        return action
-    return (self.call.adb.Shell(mock.ANY), check_and_return)
-
-  def mockExistsTest(self, exists_result):
-    def action(cmd):
-      if exists_result:
-        return ''
-      else:
-        raise device_errors.AdbCommandFailedError(
-            cmd, 'File not found', 1, str(self.adb))
-    return self.mockShellCall('test -e ', action)
-
-  def testTempFileNameAlreadyExists(self):
-    with self.assertCalls(
-        self.mockShellCall('test -d /data/local/tmp'),
-        self.mockExistsTest(True),
-        self.mockExistsTest(True),
-        self.mockExistsTest(True),
-        self.mockExistsTest(False),
-        self.mockShellCall('touch '),
-        self.mockShellCall('rm -f ')):
-      with device_temp_file.DeviceTempFile(self.adb) as tmpfile:
-        logging.debug('Temp file name: %s', tmpfile.name)
-
-  def testTempFileLifecycle(self):
-    with self.assertCalls(
-        self.mockShellCall('test -d /data/local/tmp'),
-        self.mockExistsTest(False),
-        self.mockShellCall('touch ')):
-      tempFileContextManager = device_temp_file.DeviceTempFile(self.adb)
-    with mock.patch.object(self.adb, 'Shell'):
-      with tempFileContextManager as tmpfile:
-        logging.debug('Temp file name: %s', tmpfile.name)
-        self.assertEquals(0, self.adb.Shell.call_count)
-      self.assertEquals(1, self.adb.Shell.call_count)
-      args, _ = self.adb.Shell.call_args
-      self.assertTrue(args[0].startswith('rm -f '))
-
-if __name__ == '__main__':
-  logging.getLogger().setLevel(logging.DEBUG)
-  unittest.main(verbosity=2)