github.com/cockroachdb/pebble@v0.0.0-20231214172447-ab4952c5f87b/vfs/fd_test.go (about)

     1  // Copyright 2021 The LevelDB-Go and Pebble Authors. All rights reserved. Use
     2  // of this source code is governed by a BSD-style license that can be found in
     3  // the LICENSE file.
     4  
     5  package vfs
     6  
     7  import (
     8  	"os"
     9  	"testing"
    10  	"time"
    11  
    12  	"github.com/stretchr/testify/require"
    13  )
    14  
    15  func TestFileWrappersHaveFd(t *testing.T) {
    16  	// Use the real filesystem so that we can test vfs.Default, which returns
    17  	// files with Fd().
    18  	tmpf, err := os.CreateTemp("", "pebble-db-fd-file")
    19  	require.NoError(t, err)
    20  	filename := tmpf.Name()
    21  	defer os.Remove(filename)
    22  
    23  	// File wrapper case 1: Check if diskHealthCheckingFile has Fd().
    24  	fs2, closer := WithDiskHealthChecks(Default, 10*time.Second,
    25  		func(info DiskSlowInfo) {})
    26  	defer closer.Close()
    27  	f2, err := fs2.Open(filename)
    28  	require.NoError(t, err)
    29  	require.NotZero(t, f2.Fd())
    30  	require.NotEqual(t, f2.Fd(), InvalidFd)
    31  	// File wrapper case 2: Check if syncingFile has Fd().
    32  	f3 := NewSyncingFile(f2, SyncingFileOptions{BytesPerSync: 8 << 10 /* 8 KB */})
    33  	require.NotZero(t, f3.Fd())
    34  	require.NotEqual(t, f3.Fd(), InvalidFd)
    35  	require.NoError(t, f2.Close())
    36  }