}

func messWith(fileName string, corrupter func(b []byte)) (r io.ReaderAt, size int64) {
	data, err := os.ReadFile(filepath.Join("testdata", fileName))
	if err != nil {
		panic("Error reading " + fileName + ": " + err.Error())
	}
	corrupter(data)
	return bytes.NewReader(data), int64(len(data))
}

func returnCorruptCRC32Zip() (r io.ReaderAt, size int64) {
	return messWith("go-with-datadesc-sig.zip", func(b []byte) {

			ops     fileOps
			wantCnt int64
			wantErr error
		}
		testRemaining struct { // logicalRemaining() == wantLCnt, physicalRemaining() == wantPCnt
			wantLCnt int64
			wantPCnt int64
		}
		testFnc any // testRead | testWriteTo | testRemaining
	)

	type (
		makeReg struct {
			str  string
			size int64
		}
		makeSparse struct {
			makeReg makeReg

	}
}

// Tests hash reader checksum verification.
func TestHashReaderVerification(t *testing.T) {
	testCases := []struct {
		desc              string
		src               io.Reader
		size              int64
		actualSize        int64
		md5hex, sha256hex string
		err               error
	}{
		0: {
			desc:       "Success, no checksum verification provided.",
			src:        bytes.NewReader([]byte("abcd")),
			size:       4,

import (
	. "bytes"
	"fmt"
	"io"
	"sync"
	"testing"
)

func TestReader(t *testing.T) {
	r := NewReader([]byte("0123456789"))
	tests := []struct {
		off     int64
		seek    int
		n       int
		want    string
		wantpos int64
		readerr error
		seekerr string
	}{
		{seek: io.SeekStart, off: 0, n: 20, want: "0123456789"},
		{seek: io.SeekStart, off: 1, n: 1, want: "1"},

		b.Fatal(err)
	}
	for _, file := range files {
		b.Run(file.Name(), func(b *testing.B) {
			f, err := os.ReadFile(filepath.Join("testdata", file.Name()))
			if err != nil {
				b.Fatal(err)
			}
			b.SetBytes(int64(len(f)))
			b.ReportAllocs()
			b.ResetTimer()
			var record sql.Record
			for i := 0; i < b.N; i++ {
				r := NewReader(io.NopCloser(bytes.NewBuffer(f)), &ReaderArgs{})
				for {
					record, err = r.Read(record)