server/site_tests/autoupdate_RejectDuplicateUpdate/autoupdate_RejectDuplicateUpdate.py

# Lint as: python2, python3
# Copyright 2021 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from autotest_lib.client.common_lib.cros import kernel_utils
from autotest_lib.server.cros.update_engine import update_engine_test


class autoupdate_RejectDuplicateUpdate(update_engine_test.UpdateEngineTest):
    """Tests to see if duplicate consecutive updates are rejected. """
    version = 1

    def cleanup(self):
        """Clean up the test state."""
        # Disable repeated updates using update_engine_client.
        self._set_feature(feature_name=self._REPEATED_UPDATES_FEATURE,
                          enable=False)

    def run_once(self, running_at_desk=False, build=None):
        """
        @param running_at_desk: indicates test is run locally from a workstation.
        @param build: An optional parameter to specify the target build for the
                      update when running locally. If no build is supplied, the
                      current version on the DUT will be used.

        """
        # Enable repeated updates using update_engine_client.
        self._set_feature(feature_name=self._REPEATED_UPDATES_FEATURE,
                          enable=True)
        # Get a payload to use for the test.
        payload_url = self.get_payload_for_nebraska(
                build=build, full_payload=False, public_bucket=running_at_desk)

        # Record DUT state before the update.
        _, inactive = kernel_utils.get_kernel_state(self._host)

        # Perform an update.
        self._run_client_test_and_check_result(self._CLIENT_TEST,
                                               payload_url=payload_url)

        self._wait_for_update_to_complete()

        # Perform another update. This is a duplicate update and should fail.
        self._run_client_test_and_check_result(self._CLIENT_TEST,
                                               payload_url=payload_url,
                                               allow_failure=True)

        # Check logs to make sure it failed with the correct error.
        self._check_update_engine_log_for_entry(
                'finished OmahaRequestAction with code '
                'ErrorCode::kRepeatedFpFromOmahaError',
                raise_error=True)

        # Verify the first update can still complete and reboot.
        self._host.reboot()
        kernel_utils.verify_boot_expectations(inactive, host=self._host)