| // Copyright 2015 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package clock |
| |
| import ( |
| "context" |
| "testing" |
| "time" |
| |
| . "github.com/smartystreets/goconvey/convey" |
| ) |
| |
| func TestSystemTimer(t *testing.T) { |
| t.Parallel() |
| |
| Convey(`A systemTimer instance`, t, func() { |
| ctx, cancelFunc := context.WithCancel(context.Background()) |
| t := GetSystemClock().NewTimer(ctx) |
| defer t.Stop() |
| |
| Convey(`Should start with a non-nil channel.`, func() { |
| So(t.GetC(), ShouldNotBeNil) |
| }) |
| |
| Convey(`When stopped, should return inactive.`, func() { |
| So(t.Stop(), ShouldBeFalse) |
| }) |
| |
| Convey(`Will return immediately if the Context is canceled before Reset.`, func() { |
| cancelFunc() |
| |
| t.Reset(veryLongTime) |
| So((<-t.GetC()).Err, ShouldEqual, context.Canceled) |
| }) |
| |
| Convey(`Will return if the Context is canceled after Reset.`, func() { |
| t.Reset(veryLongTime) |
| cancelFunc() |
| |
| So((<-t.GetC()).Err, ShouldEqual, context.Canceled) |
| }) |
| |
| Convey(`A timer will use the same channel when Reset.`, func() { |
| timerC := t.GetC() |
| |
| // Reset our timer to something more reasonable. It should trigger the |
| // timer channel, which should trigger our |
| t.Reset(timeBase) |
| So((<-timerC).Err, ShouldBeNil) |
| }) |
| |
| Convey(`A timer will not signal if stopped.`, func() { |
| t.Reset(timeBase) |
| t.Stop() |
| |
| // This isn't a perfect test, but it's a good boundary for flake. |
| time.Sleep(3 * timeBase) |
| |
| triggered := false |
| select { |
| case <-t.GetC(): |
| triggered = true |
| default: |
| break |
| } |
| So(triggered, ShouldBeFalse) |
| }) |
| |
| Convey(`When reset`, func() { |
| So(t.Reset(veryLongTime), ShouldBeFalse) |
| |
| Convey(`When reset again to a short duration, should return that it was active and trigger.`, func() { |
| // Upper bound of supported platform resolution. Windows is 15ms, so |
| // make sure we exceed that. |
| So(t.Reset(timeBase), ShouldBeTrue) |
| So((<-t.GetC()).IsZero(), ShouldBeFalse) |
| |
| // Again (reschedule). |
| So(t.Reset(timeBase), ShouldBeFalse) |
| So((<-t.GetC()).IsZero(), ShouldBeFalse) |
| }) |
| |
| Convey(`When stopped, should return active and have a non-nil C.`, func() { |
| active := t.Stop() |
| So(active, ShouldBeTrue) |
| So(t.GetC(), ShouldNotBeNil) |
| }) |
| |
| Convey(`When stopped, should return active.`, func() { |
| active := t.Stop() |
| So(active, ShouldBeTrue) |
| }) |
| |
| Convey(`Should have a non-nil channel.`, func() { |
| So(t.GetC(), ShouldNotBeNil) |
| }) |
| }) |
| }) |
| } |