Add mini_installer not-in-use update test.

chrome/test/mini_installer/variable_expander.py

 # Copyright 2013 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.
 
 import base64
 import hashlib
 import os
 import string
 import win32api
 import win32com.client
@@ skipping 38 matching lines @@
   user_sid, _ = win32security.GetTokenInformation(token_handle,
                                                   win32security.TokenUser)
   user_sid_string = win32security.ConvertSidToStringSid(user_sid)
   md5_digest = hashlib.md5(user_sid_string).digest()
   return '.' + base64.b32encode(md5_digest).rstrip('=')
 
 
 class VariableExpander:
   """Expands variables in strings."""
 
-  def __init__(self, mini_installer_path):
+  def __init__(self, mini_installer_path, next_version_mini_installer_path):
     """Constructor.
 
     The constructor initializes a variable dictionary that maps variables to
     their values. These are the only acceptable variables:
         * $CHROME_DIR: the directory of Chrome (or Chromium) from the base
             installation directory.
         * $CHROME_HTML_PROG_ID: 'ChromeHTML' (or 'ChromiumHTM').
         * $CHROME_LONG_NAME: 'Google Chrome' (or 'Chromium').
         * $CHROME_LONG_NAME_SXS: 'Google Chrome SxS' if $SUPPORTS_SXS.
         * $CHROME_SHORT_NAME: 'Chrome' (or 'Chromium').
         * $CHROME_SHORT_NAME_SXS: 'ChromeCanary' if $SUPPORTS_SXS.
         * $CHROME_UPDATE_REGISTRY_SUBKEY: the registry key, excluding the root
             key, of Chrome for Google Update.
         * $CHROME_UPDATE_REGISTRY_SUBKEY_SXS: the registry key, excluding the
             root key, of Chrome SxS for Google Update.
         * $LAUNCHER_UPDATE_REGISTRY_SUBKEY: the registry key, excluding the root
             key, of the app launcher for Google Update if $SUPPORTS_SXS.
         * $LOCAL_APPDATA: the unquoted path to the Local Application Data
             folder.
         * $MINI_INSTALLER: the unquoted path to the mini_installer.
-        * $MINI_INSTALLER_FILE_VERSION: the file version of the mini_installer.
+        * $MINI_INSTALLER_FILE_VERSION: the file version of $MINI_INSTALLER.
+        * $NEXT_VERSION_MINI_INSTALLER: the unquoted path to a mini_installer
+            whose version is higher than $MINI_INSTALLER.
+        * $NEXT_VERSION_MINI_INSTALLER_FILE_VERSION: the file version of
+            $NEXT_VERSION_MINI_INSTALLER.
         * $PROGRAM_FILES: the unquoted path to the Program Files folder.
         * $SUPPORTS_SXS: a boolean indicating whether or not SxS installs
             are supported by the mini_installer under test.
         * $USER_SPECIFIC_REGISTRY_SUFFIX: the output from the function
             _GetUserSpecificRegistrySuffix().
         * $VERSION_[XP/SERVER_2003/VISTA/WIN7/WIN8/WIN8_1/WIN10]: a 2-tuple
             representing the version of the corresponding OS.
         * $WINDOWS_VERSION: a 2-tuple representing the current Windows version.
 
     Args:
-      mini_installer_path: The path to mini_installer.exe.
+      mini_installer_path: The path to a mini_installer.
+      next_version_mini_installer_path: The path to a mini_installer whose
+          version is higher than |mini_installer_path|.
     """
     mini_installer_abspath = os.path.abspath(mini_installer_path)
+    next_version_mini_installer_abspath = os.path.abspath(
+        next_version_mini_installer_path)
     windows_major_ver, windows_minor_ver, _, _, _ = win32api.GetVersionEx()
     self._variable_mapping = {
         'LOCAL_APPDATA': shell.SHGetFolderPath(0, shellcon.CSIDL_LOCAL_APPDATA,
                                                None, 0),
         'MINI_INSTALLER': mini_installer_abspath,
         'MINI_INSTALLER_FILE_VERSION': _GetFileVersion(mini_installer_abspath),
+        'NEXT_VERSION_MINI_INSTALLER': next_version_mini_installer_abspath,
+        'NEXT_VERSION_MINI_INSTALLER_FILE_VERSION': _GetFileVersion(
+            next_version_mini_installer_abspath),
         'PROGRAM_FILES': shell.SHGetFolderPath(0, shellcon.CSIDL_PROGRAM_FILES,
                                                None, 0),
         'USER_SPECIFIC_REGISTRY_SUFFIX': _GetUserSpecificRegistrySuffix(),
         'VERSION_SERVER_2003': '(5, 2)',
         'VERSION_VISTA': '(6, 0)',
         'VERSION_WIN10': '(10, 0)',
         'VERSION_WIN7': '(6, 1)',
         'VERSION_WIN8': '(6, 2)',
         'VERSION_WIN8_1': '(6, 3)',
         'VERSION_XP': '(5, 1)',
@@ skipping 51 matching lines @@
     variables must be escaped with $$, otherwise a KeyError or a ValueError will
     be raised.
 
     Args:
       str: A string.
 
     Returns:
       A new string created by replacing variables with their values.
     """
     return string.Template(str).substitute(self._variable_mapping)