commit | afcc2ee1b30a94cc08cf406202f4d5406cbf0d34 | [log] [tgz] |
---|---|---|
author | Natalie Weizenbaum <nweiz@google.com> | Mon Mar 05 17:58:16 2018 -0800 |
committer | Natalie Weizenbaum <nweiz@google.com> | Mon Mar 05 21:16:13 2018 -0800 |
tree | 75c16e58ec88b1c36225d873ab46c4e76fae7873 |
Add initial files for the standalone release of clock
This package provides a Clock
class which encapsulates the notion of the “current time” and provides easy access to points relative to the current time. Different Clock
s can have a different notion of the current time, and the default top-level clock
's notion can be swapped out to reliably test timing-dependent code.
For example, you can use clock
in your libraries like this:
// run_with_timing.dart import 'package:clock/clock.dart'; /// Runs [callback] and prints how long it took. T runWithTiming<T>(T callback()) { var stopwatch = clock.getStopwatch()..start(); var result = callback(); print("It took ${stopwatch.elapsed}!"); return result; }
...and then test your code using the fake_async
package, which automatically overrides the current clock:
// run_with_timing_test.dart import 'run_with_timing.dart'; import 'package:fake_async/fake_async.dart'; import 'package:test/test.dart'; void main() { test("runWithTiming() prints the elapsed time", () { new FakeAsync().run((async) { expect(() { runWithTiming(() { async.elapse(new Duration(seconds: 10)); }); }, prints("It took 0:00:10.000000!")); }); }); }