| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MOJO_EDK_SYSTEM_TEST_UTILS_H_ |
| #define MOJO_EDK_SYSTEM_TEST_UTILS_H_ |
| |
| #include "base/time/time.h" |
| #include "mojo/public/c/system/types.h" |
| #include "mojo/public/cpp/system/macros.h" |
| |
| namespace mojo { |
| namespace system { |
| namespace test { |
| |
| // Deadlines/timeouts and sleeping --------------------------------------------- |
| |
| MojoDeadline DeadlineFromMilliseconds(unsigned milliseconds); |
| |
| // A timeout smaller than |TestTimeouts::tiny_timeout()|, as a |MojoDeadline|. |
| // Warning: This may lead to flakiness, but this is unavoidable if, e.g., you're |
| // trying to ensure that functions with timeouts are reasonably accurate. We |
| // want this to be as small as possible without causing too much flakiness. |
| MojoDeadline EpsilonDeadline(); |
| |
| // |TestTimeouts::tiny_timeout()|, as a |MojoDeadline|. (Expect this to be on |
| // the order of 100 ms.) |
| MojoDeadline TinyDeadline(); |
| |
| // |TestTimeouts::action_timeout()|, as a |MojoDeadline|. (Expect this to be on |
| // the order of 10 s.) |
| MojoDeadline ActionDeadline(); |
| |
| // Sleeps for at least the specified duration. |
| void Sleep(MojoDeadline deadline); |
| |
| // Pseudorandom numbers for testing -------------------------------------------- |
| |
| // Returns a (uniformly) (pseudo)random integer in the interval [min, max]. |
| // Currently, |max - min| must be at most |RAND_MAX| and must also be (strictly) |
| // less than |INT_MAX|. |
| int RandomInt(int min, int max); |
| |
| // Stopwatch ------------------------------------------------------------------- |
| |
| // A simple "stopwatch" for measuring time elapsed from a given starting point. |
| class Stopwatch { |
| public: |
| Stopwatch(); |
| ~Stopwatch(); |
| |
| void Start(); |
| // Returns the amount of time elapsed since the last call to |Start()| (in |
| // microseconds). |
| MojoDeadline Elapsed(); |
| |
| private: |
| base::TimeTicks start_time_; |
| |
| MOJO_DISALLOW_COPY_AND_ASSIGN(Stopwatch); |
| }; |
| |
| } // namespace test |
| } // namespace system |
| } // namespace mojo |
| |
| #endif // MOJO_EDK_SYSTEM_TEST_UTILS_H_ |