package mdb

import (
	"log"
	"os"
	"sync/atomic"
	"testing"
	"time"
)

func TestDBIsolation(t *testing.T) {
	if testing.Short() {
		t.Skip("Skipping test in short mode.")
	}
	rootDir := t.TempDir()
	defer os.RemoveAll(rootDir)

	db, err := OpenDataDB(rootDir)
	if err != nil {
		t.Fatal(err)
	}

	done := &atomic.Bool{}
	go func() {
		defer done.Store(true)
		db.ModifyFor(8 * time.Second)
	}()

	count := 0
	for !done.Load() {
		count++
		tx := db.Snapshot()
		computed := db.ComputeCRC(tx)
		stored := db.ReadCRC(tx)
		if computed != stored {
			t.Fatal(stored, computed)
		}
	}

	log.Printf("Read: %d", count)
}