1package config23import "testing"45func TestNewConfigFile(t *testing.T) {6 for _, cfg := range []*Config{7 nil,8 DefaultConfig(),9 &Config{},10 } {11 if s := newConfigFile(cfg); s == "" {12 t.Errorf("newConfigFile(nil) => %q, want non-empty string", s)13 }14 }15}