Add context-aware "time" library wrapper.

go/src/infra/libs/clock/testclock/testtimer_test.go

+// Copyright (c) 2015 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.
+
+package testclock
+
+import (
+        "testing"
+        "time"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestTestTimer(t *testing.T) {
+        Convey(`A timer instance`, t, func() {
+                t := NewTimer()
+
+                Convey(`Should have a non-nil C.`, func() {
+                        So(t.GetC(), ShouldNotBeNil)
+                })
+
+                Convey(`When set to Active`, func() {
+                        t.(*timer).active = true
+
+                        Convey(`When reset, should return active.`, func() {
+                                active := t.Reset(1 * time.Hour)
+                                So(active, ShouldBeTrue)
+                        })
+
+                        Convey(`When stopped, should return active.`, func() {
+                                So(t.Stop(), ShouldBeTrue)
+
+                                Convey(`And when stopped again, should return inactive.`, func() {
+                                        So(t.Stop(), ShouldBeFalse)
+                                })
+                        })
+                })
+
+                Convey(`Should successfully signal.`, func() {
+                        t.Signal(time.Time{})
+
+                        var signalled bool
+                        select {
+                        case <-t.GetC():
+                                signalled = true
+                        default:
+                                break
+                        }
+                        So(signalled, ShouldBeTrue)
+                })
+        })
+}