VictoriaMetrics/lib/fs/reader_at_test.go
Aliaksandr Valialkin 06f6de6d47
all: use os.{Read|Write}File instead of ioutil.{Read|Write}File
The ioutil.{Read|Write}File is deprecated since Go1.16 -
see https://tip.golang.org/doc/go1.16#ioutil

VictoriaMetrics needs at least Go1.18, so it is safe to remove ioutil usage
from source code.

This is a follow-up for 02ca2342ab
2022-08-21 23:55:20 +03:00

34 lines
725 B
Go

package fs
import (
"fmt"
"os"
"testing"
)
func TestReaderAt(t *testing.T) {
for _, bufSize := range []int{1, 1e1, 1e2, 1e3, 1e4, 1e5} {
t.Run(fmt.Sprintf("%d", bufSize), func(t *testing.T) {
testReaderAt(t, bufSize)
})
}
}
func testReaderAt(t *testing.T, bufSize int) {
path := "TestReaderAt"
const fileSize = 8 * 1024 * 1024
data := make([]byte, fileSize)
if err := os.WriteFile(path, data, 0600); err != nil {
t.Fatalf("cannot create %q: %s", path, err)
}
defer MustRemoveAll(path)
r := MustOpenReaderAt(path)
defer r.MustClose()
buf := make([]byte, bufSize)
for i := 0; i < fileSize-bufSize; i += bufSize {
offset := int64(i)
r.MustReadAt(buf[:0], offset)
r.MustReadAt(buf, offset)
}
}