| // 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 <inttypes.h> |
| |
| #include <lib/zx/time.h> |
| #include <zircon/syscalls.h> |
| #include <zxtest/zxtest.h> |
| |
| namespace { |
| |
| // Calculation of elapsed time using ticks. |
| TEST(TicksTest, ElapsedTimeUsingTicks) { |
| zx::ticks ticks_per_second = zx::ticks::per_second(); |
| ASSERT_GT(ticks_per_second, zx::ticks(0), "Invalid ticks per second"); |
| |
| zx::ticks start = zx::ticks::now(); |
| zx::ticks end = zx::ticks::now(); |
| ASSERT_GE(end, start, "Ticks went backwards"); |
| |
| double seconds = |
| static_cast<double>((end - start).get()) / static_cast<double>(ticks_per_second.get()); |
| ASSERT_GE(seconds, 0, "Time went backwards"); |
| } |
| |
| } // namespace |
