blob: 864f81cb1e90f69e937fbf7484e47ecaf4912a33 [file] [log] [blame]
// Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <base/macros.h>
#include <base/time/time.h>
namespace power_manager {
// Simple class that allows tests to control the time.
// Classes should create a Clock member, provide a getter method that
// returns a pointer to it or some other means to call the
// set_current_*time_for_testing() setters, and then call GetCurrentTime()
// instead of base::TimeTicks::Now() and GetCurrentWallTime() instead of
// base::Time::Now().
// TODO(chromeos-power): Consider replacing this class with base::Clock and
// base::TickClock.
class Clock {
Clock(const Clock&) = delete;
Clock& operator=(const Clock&) = delete;
void set_current_time_for_testing(base::TimeTicks now) {
current_time_for_testing_ = now;
void set_current_boot_time_for_testing(base::TimeTicks now) {
current_boot_time_for_testing_ = now;
void set_current_wall_time_for_testing(base::Time now) {
current_wall_time_for_testing_ = now;
void advance_current_boot_time_for_testing(base::TimeDelta delta) {
current_boot_time_for_testing_ += delta;
void set_time_step_for_testing(base::TimeDelta step) {
time_step_for_testing_ = step;
// Returns the last-set monotonically-increasing time, or the actual time
// (i.e. CLOCK_MONOTONIC) if |current_time_for_testing_| is unset. Time does
// not advance while the system is suspended.
base::TimeTicks GetCurrentTime();
// Similar to GetCurrentTime(), except time also advances while the system is
// suspended (i.e. CLOCK_BOOTTIME).
base::TimeTicks GetCurrentBootTime();
// Returns the last-set wall time, or the actual time (i.e. gettimeofday()) if
// |current_wall_time_for_testing_| is unset.
base::Time GetCurrentWallTime();
base::TimeTicks current_time_for_testing_;
base::TimeTicks current_boot_time_for_testing_;
base::Time current_wall_time_for_testing_;
// Amount of time that |current_*time_for_testing_| should be advanced by each
// successive call to GetCurrent*Time().
base::TimeDelta time_step_for_testing_;
} // namespace power_manager