make map driver type for faster tests

storage/graph_test.go

@@ -3,7 +3,6 @@ package storage
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"local/dndex/storage/entity"
 	"local/dndex/storage/operator"
 	"os"
@@ -16,13 +15,6 @@ import (
 
 func TestIntegration(t *testing.T) {
 	os.Args = os.Args[:1]
-	f, err := ioutil.TempFile(os.TempDir(), "pattern*")
-	if err != nil {
-		t.Fatal(err)
-	}
-	f.Close()
-	defer os.Remove(f.Name())
-	os.Setenv("DBURI", f.Name())
 	graph := NewRateLimitedGraph()
 	ctx, can := context.WithCancel(context.TODO())
 	defer can()