cipd: Refactor client to make it more readable.

go/src/infra/tools/cipd/local/manifest_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 local
+
+import (
+        "bytes"
+        "strings"
+        "testing"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestReadManifest(t *testing.T) {
+        var goodManifest = `{
+  "format_version": "1",
+  "package_name": "package/name"
+}`
+
+        Convey("readManifest can read valid manifest", t, func() {
+                manifest, err := readManifest(strings.NewReader(goodManifest))
+                So(manifest, ShouldResemble, Manifest{
+                        FormatVersion: "1",
+                        PackageName:   "package/name",
+                })
+                So(err, ShouldBeNil)
+        })
+
+        Convey("readManifest rejects invalid manifest", t, func() {
+                manifest, err := readManifest(strings.NewReader("I'm not a manifest"))
+                So(manifest, ShouldResemble, Manifest{})
+                So(err, ShouldNotBeNil)
+        })
+
+        Convey("writeManifest works", t, func() {
+                buf := &bytes.Buffer{}
+                m := Manifest{
+                        FormatVersion: "1",
+                        PackageName:   "package/name",
+                }
+                So(writeManifest(&m, buf), ShouldBeNil)
+                So(string(buf.Bytes()), ShouldEqual, goodManifest)
+        })
+}