1. Fixed t.Cleanup

internal/test/cleanup.go

@@ -3,5 +3,6 @@
 
 package test
 
+// Cleanup skipped for go1.13 and lower.
 func Cleanup(t *testing.T, fn func()) {
 }

internal/test/cleanup_go1.14.go

@@ -7,6 +7,8 @@ import (
 	"testing"
 )
 
+// Cleanup is a helper function to register cleanup function for a test.
+// t.Cleanup was added in go1.14.
 func Cleanup(t *testing.T, fn func()) {
 	t.Cleanup(fn)
 }

internal/test/sql.go

@@ -24,7 +24,7 @@ func NewDBMockWithClose(t *testing.T) (*sql.DB, sqlmock.Sqlmock) {
 	db, dbmock := NewDBMock()
 
 	// need to solve goroutine leak detection https://kumakichi.github.io/goroutine-leak.html
-	t.Cleanup(func() {
+	Cleanup(t, func() {
 		dbmock.ExpectClose()
 
 		require.NoError(t, db.Close())