Added unit annotation supports onto tsmon in go.

appengine/tsmon/global_callback_test.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package tsmon
 
 import (
         "net/http"
         "net/http/httptest"
         "testing"
         "time"
 
         "github.com/luci/gae/service/datastore"
         "github.com/luci/luci-go/common/clock"
         "github.com/luci/luci-go/common/tsmon"
         "github.com/luci/luci-go/common/tsmon/metric"
+        "github.com/luci/luci-go/common/tsmon/types"
         "github.com/luci/luci-go/server/router"
         "golang.org/x/net/context"
 
         . "github.com/smartystreets/goconvey/convey"
 )
 
 func flushNowWithMiddleware(c context.Context, state *State) {
         ds := datastore.Get(c)
 
         i := instance{
@@ skipping 12 matching lines @@
                 nil,
         )
         So(rec.Code, ShouldEqual, http.StatusOK)
 }
 
 func TestGlobalCallbacks(t *testing.T) {
         Convey("Global callbacks", t, func() {
                 c, _ := buildGAETestContext()
                 state, mon := buildTestState()
 
-                m := metric.NewCallbackStringIn(c, "foo", "")
+                m := metric.NewCallbackStringIn(c, "foo", "", types.MetricMetadata{})
 
                 tsmon.RegisterGlobalCallbackIn(c, func(c context.Context) {
                         m.Set(c, "bar")
                 }, m)
 
                 Convey("are not run on flush", func() {
                         flushNowWithMiddleware(c, state)
                         val, err := tsmon.Store(c).Get(c, m, time.Time{}, []interface{}{})
                         So(err, ShouldBeNil)
                         So(val, ShouldBeNil)
@@ skipping 22 matching lines @@
                                 So(err, ShouldBeNil)
                                 So(val, ShouldBeNil)
 
                                 So(len(mon.Cells), ShouldEqual, 1)
                                 So(len(mon.Cells[0]), ShouldEqual, 1)
                                 So(mon.Cells[0][0].Value, ShouldEqual, "bar")
                         })
                 })
         })
 }