package testing

import (
	"crypto/rand"
	"fmt"
	"math/big"
	"os"
	"path"
	"testing"

	"github.com/prysmaticlabs/prysm/shared/testutil"
	slasherDB "github.com/prysmaticlabs/prysm/slasher/db"
	"github.com/prysmaticlabs/prysm/slasher/db/kv"
)

func TestClearDB(t *testing.T) {
	// Setting up manually is required, since SetupDB() will also register a teardown procedure.
	randPath, err := rand.Int(rand.Reader, big.NewInt(1000000))
	if err != nil {
		t.Fatalf("Could not generate random file path: %v", err)
	}
	p := path.Join(testutil.TempDir(), fmt.Sprintf("/%d", randPath))
	if err := os.RemoveAll(p); err != nil {
		t.Fatalf("Failed to remove directory: %v", err)
	}
	cfg := &kv.Config{}
	db, err := slasherDB.NewDB(p, cfg)
	if err != nil {
		t.Fatalf("Failed to instantiate DB: %v", err)
	}
	db.EnableSpanCache(false)
	if err := db.ClearDB(); err != nil {
		t.Fatal(err)
	}

	if _, err := os.Stat(db.DatabasePath()); !os.IsNotExist(err) {
		t.Fatalf("db wasnt cleared %v", err)
	}
}