Add context-aware "time" library wrapper.

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

Index: go/src/infra/libs/clock/testclock/testtimer_test.go
diff --git a/go/src/infra/libs/clock/testclock/testtimer_test.go b/go/src/infra/libs/clock/testclock/testtimer_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..685eeb582529b2d5eb669edb2b2529d98308dca5
--- /dev/null
+++ b/go/src/infra/libs/clock/testclock/testtimer_test.go
@@ -0,0 +1,52 @@
+// 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)
+		})
+	})
+}