github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/pkg/fsutil/preallocate_test.go (about)

     1  // Copyright 2022 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //	http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  package fsutil
    14  
    15  import (
    16  	"os"
    17  	"testing"
    18  
    19  	"github.com/stretchr/testify/require"
    20  )
    21  
    22  func TestPreAllocate(t *testing.T) {
    23  	f, err := os.CreateTemp("", "preallocate-test")
    24  	defer os.Remove(f.Name())
    25  	require.Nil(t, err)
    26  
    27  	size := int64(64 * 1024 * 1024)
    28  	err = PreAllocate(f, size)
    29  	require.Nil(t, err)
    30  
    31  	stat, err := f.Stat()
    32  	require.Nil(t, err)
    33  	require.Equal(t, size, stat.Size())
    34  }