Simple memory testing for gae/wrapper

go/src/infra/gae/libs/wrapper/memory/binutils_test.go

+// Copyright 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 memory
+
+import (
+        "bytes"
+        "testing"
+
+        . "github.com/smartystreets/goconvey/convey"
+)
+
+func TestBinutils(t *testing.T) {
+        Convey("Binary utilities", t, func() {
+                b := &bytes.Buffer{}
+
+                Convey("bytes", func() {
+                        t := []byte("this is a test")
+                        writeBytes(b, t)
+                        Convey("good", func() {
+                                r, err := readBytes(b)
+                                So(err, ShouldBeNil)
+                                So(r, ShouldResemble, t)
+                        })
+                        Convey("bad (truncated buffer)", func() {
+                                bs := b.Bytes()
+                                _, err := readBytes(bytes.NewBuffer(bs[:len(bs)-4]))
+                                So(err.Error(), ShouldContainSubstring, "readBytes: expected ")
+                        })
+                        Convey("bad (bad varint)", func() {
+                                _, err := readBytes(bytes.NewBuffer([]byte{0x8f}))
+                                So(err.Error(), ShouldContainSubstring, "EOF")
+                        })
+                })
+
+                Convey("strings", func() {
+                        t := "this is a test"
+                        writeString(b, t)
+                        Convey("good", func() {
+                                r, err := readString(b)
+                                So(err, ShouldBeNil)
+                                So(r, ShouldEqual, t)
+                        })
+                        Convey("bad (truncated buffer)", func() {
+                                bs := b.Bytes()
+                                _, err := readString(bytes.NewBuffer(bs[:len(bs)-4]))
+                                So(err.Error(), ShouldContainSubstring, "readBytes: expected ")
+                        })
+                })
+        })
+}