| // Copyright 2016 The Fuchsia 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 <zircon/syscalls.h> |
| #include <unittest/unittest.h> |
| #include <inttypes.h> |
| |
| // Calculation of elapsed time using ticks. |
| static bool elapsed_time_using_ticks(void) { |
| BEGIN_TEST; |
| |
| zx_ticks_t per_second = zx_ticks_per_second(); |
| ASSERT_GT(per_second, 0u, "Invalid ticks per second"); |
| unittest_printf("Ticks per second: %" PRIu64 "\n", per_second); |
| |
| zx_ticks_t x = zx_ticks_get(); |
| zx_ticks_t y = zx_ticks_get(); |
| ASSERT_GE(y, x, "Ticks went backwards"); |
| |
| double seconds = (y - x) / (double)per_second; |
| ASSERT_GE(seconds, 0u, "Time went backwards"); |
| |
| END_TEST; |
| } |
| |
| BEGIN_TEST_CASE(ticks_tests) |
| RUN_TEST(elapsed_time_using_ticks) |
| END_TEST_CASE(ticks_tests) |