LogDog: Fix archived log stream read errors.

common/recordio/size_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 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))))
+                                })
+                        }
+                }
+        })
+}