ceremonyclient/pebble/sstable/buffer_pool_test.go
Cassandra Heart 2e2a1e4789
v1.2.0 (#31)
2024-01-03 01:31:42 -06:00

79 lines
1.6 KiB
Go

// Copyright 2023 The LevelDB-Go and Pebble 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 sstable
import (
"bytes"
"fmt"
"io"
"testing"
"github.com/cockroachdb/datadriven"
)
func writeBufferPool(w io.Writer, bp *BufferPool) {
for i := 0; i < cap(bp.pool); i++ {
if i > 0 {
fmt.Fprint(w, " ")
}
if i >= len(bp.pool) {
fmt.Fprint(w, "[ ]")
continue
}
sz := len(bp.pool[i].v.Buf())
if bp.pool[i].b == nil {
fmt.Fprintf(w, "[%4d]", sz)
} else {
fmt.Fprintf(w, "<%4d>", sz)
}
}
}
func TestBufferPool(t *testing.T) {
var bp BufferPool
var buf bytes.Buffer
handles := map[string]Buf{}
drainPool := func() {
for h, b := range handles {
b.Release()
delete(handles, h)
}
bp.Release()
}
defer drainPool()
datadriven.RunTest(t, "testdata/buffer_pool", func(t *testing.T, td *datadriven.TestData) string {
buf.Reset()
switch td.Cmd {
case "init":
if cap(bp.pool) > 0 {
drainPool()
}
var initialSize int
td.ScanArgs(t, "size", &initialSize)
bp.Init(initialSize)
writeBufferPool(&buf, &bp)
return buf.String()
case "alloc":
var n int
var handle string
td.ScanArgs(t, "n", &n)
td.ScanArgs(t, "handle", &handle)
handles[handle] = bp.Alloc(n)
writeBufferPool(&buf, &bp)
return buf.String()
case "release":
var handle string
td.ScanArgs(t, "handle", &handle)
b := handles[handle]
b.Release()
delete(handles, handle)
writeBufferPool(&buf, &bp)
return buf.String()
default:
return fmt.Sprintf("unrecognized command %q", td.Cmd)
}
})
}