1/******************************************************************************
2 *
3 *  Copyright (C) 2015 Google, Inc.
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19#include <gtest/gtest.h>
20
21#include "AllocationTestHarness.h"
22
23extern "C" {
24#include "osi/include/time.h"
25}
26
27// Generous upper bound: 10 seconds
28static const uint32_t TEST_TIME_DELTA_UPPER_BOUND_MS = 10 * 1000;
29
30class TimeTest : public AllocationTestHarness {};
31
32//
33// Test that the return value of time_get_os_boottime_ms() is not zero.
34//
35// NOTE: For now this test is disabled, because the return value
36// of time_get_os_boottime_ms() is 32-bits integer that could wrap-around
37// in 49.7 days. It should be re-enabled if/after the wrap-around issue
38// is resolved (e.g., if the return value is 64-bits integer).
39//
40#if 0
41TEST_F(TimeTest, test_time_get_os_boottime_ms_not_zero) {
42  uint32_t t1 = time_get_os_boottime_ms();
43  ASSERT_TRUE(t1 > 0);
44}
45#endif
46
47//
48// Test that the return value of time_get_os_boottime_ms()
49// is monotonically increasing within reasonable boundries.
50//
51TEST_F(TimeTest, test_time_get_os_boottime_ms_increases_upper_bound) {
52  uint32_t t1 = time_get_os_boottime_ms();
53  uint32_t t2 = time_get_os_boottime_ms();
54  ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS);
55}
56
57//
58// Test that the return value of time_get_os_boottime_ms()
59// is increasing.
60//
61TEST_F(TimeTest, test_time_get_os_boottime_ms_increases_lower_bound) {
62  static const uint32_t TEST_TIME_SLEEP_MS = 100;
63  struct timespec delay;
64
65  delay.tv_sec = TEST_TIME_SLEEP_MS / 1000;
66  delay.tv_nsec = 1000 * 1000 * (TEST_TIME_SLEEP_MS % 1000);
67
68  // Take two timestamps with sleep in-between
69  uint32_t t1 = time_get_os_boottime_ms();
70  int err = nanosleep(&delay, &delay);
71  uint32_t t2 = time_get_os_boottime_ms();
72
73  ASSERT_TRUE(err == 0);
74  ASSERT_TRUE((t2 - t1) >= TEST_TIME_SLEEP_MS);
75  ASSERT_TRUE((t2 - t1) < TEST_TIME_DELTA_UPPER_BOUND_MS);
76}
77