for {
				record, err = r.Read(record)
				if err != nil {
					break
				}
			}
			if err != io.EOF {
				t.Fatalf("Reading failed with %s, %s", err, file.Name())
			}
		})
	}
}

func BenchmarkReader(b *testing.B) {
	files, err := os.ReadDir("testdata")
	if err != nil {
		b.Fatal(err)
	}
	for _, file := range files {
		b.Run(file.Name(), func(b *testing.B) {