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1# Copyright 2020 The Chromium OS Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5import logging
6
7from autotest_lib.client.common_lib import error
8from autotest_lib.client.cros.power import power_status
9from autotest_lib.client.cros.power import power_test
10from autotest_lib.client.cros.power import power_utils
11
12
13class power_WaitForCoolDown(power_test.power_Test):
14    """class for power_WaitForCoolDown test."""
15    version = 1
16
17    def initialize(self, pdash_note='', seconds_period=20.,
18                   force_discharge=False):
19        power_utils.set_display_power(power_utils.DISPLAY_POWER_ALL_OFF)
20        super(power_WaitForCoolDown, self).initialize(
21                seconds_period=seconds_period,
22                pdash_note=pdash_note,
23                force_discharge=force_discharge)
24        for log in self._meas_logs:
25            if type(log) == power_status.TempLogger:
26                self._tlog = log
27                break
28        else:
29            raise error.TestNAError('DUT does not have temp sensor.')
30
31    def run_once(self, target_temp=48, max_runtime=600):
32        """"Look at temperature every |seconds_period| seconds for at most
33        |max_runtime| seconds until reported temps do not exceed |target_temp|.
34
35        @param target_temp: Target temperature in celsius.
36        @param max_runtime: Maximum runtime in seconds.
37        """
38        loop_secs = max(1, int(self._seconds_period))
39        num_loop = int(max_runtime / loop_secs)
40        self.start_measurements()
41
42        for i in range(num_loop):
43            max_temp = max(self._tlog.refresh())
44            if max_temp <= target_temp:
45                logging.info('Cooldown at %d seconds, temp: %.1fC',
46                             i * self._seconds_period, max_temp)
47                return
48            self.loop_sleep(i, loop_secs)
49
50        max_temp = max(self._tlog.refresh())
51        logging.warn(
52            'Fail to cool down after %d seconds, temp: %.1fC, target: %dC',
53            num_loop * loop_secs, max_temp, target_temp)
54
55    def cleanup(self):
56        power_utils.set_display_power(power_utils.DISPLAY_POWER_ALL_ON)
57        super(power_WaitForCoolDown, self).cleanup()
58