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// Copyright 2018 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 <gtest/gtest.h>
#include <stdio.h>
extern "C" {
#include "polled_interval_checker.h"
}
static const int INTERVAL_DURATION = 5;
static struct timespec time_now;
static struct polled_interval* create_interval() {
struct polled_interval* interval =
pic_polled_interval_create(INTERVAL_DURATION);
EXPECT_NE(interval, static_cast<struct polled_interval*>(NULL));
return interval;
}
TEST(PolledIntervalCheckerTest, CreateDestroy) {
// Create an interval, checks it is non-null.
struct polled_interval* interval = create_interval();
pic_polled_interval_destroy(&interval);
// Check it's been set to null.
EXPECT_EQ(interval, static_cast<struct polled_interval*>(NULL));
}
TEST(PolledIntervalCheckerTest, BasicFlow) {
// Set initial time.
time_now.tv_sec = 1000;
time_now.tv_nsec = 0;
pic_update_current_time();
// Create interval starting at initial time.
struct polled_interval* interval = create_interval();
// Check it hasn't elapsed.
EXPECT_FALSE(pic_interval_elapsed(interval));
// Increment time by less than the interval duration.
time_now.tv_sec += INTERVAL_DURATION / 2;
pic_update_current_time();
// Check the interval hasn't elapsed yet.
EXPECT_FALSE(pic_interval_elapsed(interval));
// Increment time past the duration of the interval.
time_now.tv_sec += INTERVAL_DURATION;
// We haven't updated the current time, check the interval hasn't
// elapsed (that it isn't calling clock_gettime without us asking it to).
EXPECT_FALSE(pic_interval_elapsed(interval));
// Update time, check the interval has elapsed.
pic_update_current_time();
EXPECT_TRUE(pic_interval_elapsed(interval));
pic_polled_interval_destroy(&interval);
}
TEST(PolledIntervalCheckerTest, DoesNotResetAutomatically) {
// Set initial time.
time_now.tv_sec = 1000;
time_now.tv_nsec = 0;
pic_update_current_time();
struct polled_interval* interval = create_interval();
// Initial check.
EXPECT_FALSE(pic_interval_elapsed(interval));
// Increment time so the interval elapses.
time_now.tv_sec += INTERVAL_DURATION;
pic_update_current_time();
// Check the interval has elapsed.
EXPECT_TRUE(pic_interval_elapsed(interval));
// Increment time further.
time_now.tv_sec += INTERVAL_DURATION * 2;
pic_update_current_time();
// Check the interval has still elapsed.
EXPECT_TRUE(pic_interval_elapsed(interval));
// Check repeated calls return true.
EXPECT_TRUE(pic_interval_elapsed(interval));
pic_polled_interval_destroy(&interval);
}
TEST(PolledIntervalCheckerTest, Reset) {
// Set initial time.
time_now.tv_sec = 1000;
time_now.tv_nsec = 0;
pic_update_current_time();
struct polled_interval* interval = create_interval();
// Initial check.
EXPECT_FALSE(pic_interval_elapsed(interval));
// Increment time so the interval elapses.
time_now.tv_sec += INTERVAL_DURATION;
pic_update_current_time();
// Check the interval has elapsed.
EXPECT_TRUE(pic_interval_elapsed(interval));
// Increment time further.
time_now.tv_sec += INTERVAL_DURATION * 2;
pic_update_current_time();
// Check the interval has still elapsed.
EXPECT_TRUE(pic_interval_elapsed(interval));
// Reset the interval.
pic_interval_reset(interval);
// Check it's been reset.
EXPECT_FALSE(pic_interval_elapsed(interval));
// Increment time to just before it should elapse again.
time_now.tv_sec += INTERVAL_DURATION - 1;
pic_update_current_time();
// Check it still has not elapsed.
EXPECT_FALSE(pic_interval_elapsed(interval));
// Increment time to one duration after we reset it.
time_now.tv_sec += 1;
pic_update_current_time();
// Check the interval has elapsed now.
EXPECT_TRUE(pic_interval_elapsed(interval));
pic_polled_interval_destroy(&interval);
}
/* Stubs */
extern "C" {
int clock_gettime(clockid_t clk_id, struct timespec* tp) {
*tp = time_now;
return 0;
}
} // extern "C"
int main(int argc, char** argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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