cipd: Refactor client to make it more readable.

go/src/infra/tools/cipd/local/files_test.go

 // Copyright 2014 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 cipd
+package local
 
 import (
         "io/ioutil"
         "os"
         "path/filepath"
         "testing"
 
         . "github.com/smartystreets/goconvey/convey"
 )
 
@@ skipping 449 matching lines @@
                         So(dest.Begin(), ShouldBeNil)
                         w, err := dest.CreateFile("a", false)
                         So(w, ShouldNotBeNil)
                         So(err, ShouldBeNil)
                         So(dest.End(true), ShouldNotBeNil)
                         w.Close()
                         So(dest.End(true), ShouldBeNil)
                 })
         })
 }