Simple memory testing for gae/wrapper

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

Index: go/src/infra/gae/libs/wrapper/memory/binutils_test.go
diff --git a/go/src/infra/gae/libs/wrapper/memory/binutils_test.go b/go/src/infra/gae/libs/wrapper/memory/binutils_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..de3ebc7c61b0c6b4ee450bb39631772117085783
--- /dev/null
+++ b/go/src/infra/gae/libs/wrapper/memory/binutils_test.go
@@ -0,0 +1,52 @@
+// 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 ")
+			})
+		})
+	})
+}