LogDog: Fix archived log stream read errors.

common/recordio/size_test.go

Index: common/recordio/size_test.go
diff --git a/common/recordio/size_test.go b/common/recordio/size_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..04f7e4441efe72aeb6378e58c4612eca3f307a7f
--- /dev/null
+++ b/common/recordio/size_test.go
@@ -0,0 +1,43 @@
+// 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 recordio
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestFrameHeaderSize(t *testing.T) {
+	t.Parallel()
+
+	Convey(`Testing FrameHeaderSize`, t, func() {
+		prev := -1
+		for i := 0; i < 5; i++ {
+			base := 1 << uint(7*i)
+			for delta := range []int{-1, 0, 1} {
+				base += delta
+				if base <= prev {
+					continue
+				}
+				prev = base
+
+				Convey(fmt.Sprintf(`Is accurate for buffer size %d.`, base), func() {
+					data := bytes.Repeat([]byte{0x55}, base)
+
+					amt, err := WriteFrame(ioutil.Discard, data)
+					if err != nil {
+						panic(err)
+					}
+
+					So(amt-len(data), ShouldEqual, FrameHeaderSize(int64(len(data))))
+				})
+			}
+		}
+	})
+}