135     """Assert that given protobuf is a policy with device settings in it.
138     @raises OwnershipError if this isn't CrOS policy, or has no settings inside.
157 def assert_guest_setting(settings, guests):  argument
158     """Assert that given protobuf has given guest-related settings.
160     @param settings: a ChromeDeviceSettingsProto protobuf.
162     @raises OwnershipError if settings doesn't enforce the provided setting.
164     if not settings.HasField("guest_mode_enabled"):
166     if not settings.guest_mode_enabled.HasField("guest_mode_enabled"):
168     if settings.guest_mode_enabled.guest_mode_enabled != guests:
172 def assert_show_users(settings, show_users):  argument
173     """Assert that given protobuf has given user-avatar-showing settings.
175     @param settings: a ChromeDeviceSettingsProto protobuf.
177     @raises OwnershipError if settings doesn't enforce the provided setting.
179     if not settings.HasField("show_user_names"):
181     if not settings.show_user_names.HasField("show_user_names"):
183     if settings.show_user_names.show_user_names != show_users:
187 def assert_roaming(settings, roaming):  argument
188     """Assert that given protobuf has given roaming settings.
190     @param settings: a ChromeDeviceSettingsProto protobuf.
192     @raises OwnershipError if settings doesn't enforce the provided setting.
194     if not settings.HasField("data_roaming_enabled"):
196     if not settings.data_roaming_enabled.HasField("data_roaming_enabled"):
198     if settings.data_roaming_enabled.data_roaming_enabled != roaming:
202 def assert_new_users(settings, new_users):  argument
203     """Assert that given protobuf has given new user settings.
205     @param settings: a ChromeDeviceSettingsProto protobuf.
207     @raises OwnershipError if settings doesn't enforce the provided setting.
209     if not settings.HasField("allow_new_users"):
211     if not settings.allow_new_users.HasField("allow_new_users"):
213     if settings.allow_new_users.allow_new_users != new_users:
217 def assert_users_on_whitelist(settings, users):  argument
220     @param settings: a ChromeDeviceSettingsProto protobuf.
222     @raises OwnershipError if settings doesn't enforce the provided setting.
224     if settings.HasField("user_whitelist"):
226             if user not in settings.user_whitelist.user_whitelist: