Cleanup machine based on the state in configuration file for mini installer test.

chrome/test/mini_installer/verifier_visitor.py

+# Copyright 2017 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.
+
+class VerifierVisitor(object):
+
+  def VisitFile(self, entry):
+    """ Verifies that the current files match the expectation dictionaries.
+
+        Throw AssertionError if |is_file_exists| doesn't match
+        |should_file_exist|.
+    """
+    error_message = ""
+    if entry.is_file_existed:
+      error_message = 'File %s exists' % entry.file_path
+    else:
+      error_message = 'File %s is missing' % entry.file_path
+    assert entry.should_file_exist == entry.is_file_existed, error_message
+
+  def VisitProcess(self, entry):
+    """ Verifies that the running processes is launched or shutdown as
+        expectation.
+    """
+    error_message = ""
+    if entry.is_running:
+      error_message = 'Process %s is running' % entry.process_path
+    else:
+      error_message = 'Process %s is not running' % entry.process_path
+    assert entry.should_process_run == entry.is_running, error_message
+
+  def VisitRegistryKey(self, entry):
+    """Verifies that the current registry key matches the specified criteria."""
+    if entry.should_key_exist == 'forbidden':
+      assert entry.key_handle is None, 'Registry key %s exists' % entry.key
+    elif entry.should_key_exist == 'required':
+      assert entry.key_handle is not None, ('Registry key %s is missing'
+          ) % entry.key
+
+
+  def VisitRegistryValue(self, entry):
+    """Verifies that the current registry value matches the specified criteria.
+    """
+    error_message = ""
+    if entry.expected_type == None:
+      error_message = ('Value %s of registry key %s exists '
+                     'with value %s') % (entry.value, entry.key,
+                         entry.value_data)
+    elif entry.value_type == None:
+      error_message = 'Value %s of registry key %s is missing' % (entry.value,
+          entry.key)
+    else:
+      error_message = 'Value %s of registry key %s has unexpected type %s' % (
+              entry.value, entry.key, entry.expected_type)
+    assert entry.expected_type == entry.value_type, error_message
+    assert entry.expected_data == entry.value_data, (
+          'Value %s of registry key %s has unexpected data.\n'
+           '  Expected: %s\n'
+           '  Actual: %s') % (entry.value, entry.key, entry.expected_data,
+               entry.value_data)