prysm-pulse/beacon-chain/db/testing/setup_db.go

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// Package testing allows for spinning up a real bolt-db
// instance for unit tests throughout the Prysm repo.
package testing
import (
"crypto/rand"
"fmt"
"math/big"
"os"
"path"
"testing"
"github.com/prysmaticlabs/prysm/beacon-chain/cache"
"github.com/prysmaticlabs/prysm/beacon-chain/db"
"github.com/prysmaticlabs/prysm/beacon-chain/db/kv"
"github.com/prysmaticlabs/prysm/shared/testutil"
)
// SetupDB instantiates and returns database backed by key value store.
func SetupDB(t testing.TB) db.Database {
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)
}
s, err := kv.NewKVStore(p, cache.NewStateSummaryCache())
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() {
if err := s.Close(); err != nil {
t.Fatalf("failed to close database: %v", err)
}
if err := os.RemoveAll(s.DatabasePath()); err != nil {
t.Fatalf("could not remove tmp db dir: %v", err)
}
})
return s
}