Milo: Increase test coverage for appengine/buildbot

milo/appengine/buildbot/build.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 buildbot
 
 import (
         "encoding/json"
         "errors"
         "fmt"
@@ skipping 462 matching lines @@
         path := filepath.Join("..", "buildbot", "testdata", fname)
         raw, err := ioutil.ReadFile(path)
         if err != nil {
                 return nil, err
         }
         b := &buildbotBuild{}
         return b, json.Unmarshal(raw, b)
 }
 
 // build fetches a buildbot build and translates it into a miloBuild.
-func build(c context.Context, master, builder string, buildNum int) (*resp.MiloBuild, error) {
+func Build(c context.Context, master, builder string, buildNum int) (*resp.MiloBuild, error) {
         var b *buildbotBuild
         var err error
         if master == "debug" {
                 b, err = getDebugBuild(c, builder, buildNum)
         } else {
                 b, err = getBuild(c, master, builder, buildNum)
         }
         if err != nil {
                 return nil, err
         }
@@ skipping 149 matching lines @@
         var newAliases map[string][]*buildbotLinkAlias
         if l := remainingAliases.Len(); l > 0 {
                 newAliases = make(map[string][]*buildbotLinkAlias, l)
                 remainingAliases.Iter(func(v string) bool {
                         newAliases[v] = s.Aliases[v]
                         return true
                 })
         }
         s.Aliases = newAliases
 }