case "hijack":
			c, _, err := w.(Hijacker).Hijack()
			if err != nil {
				t.Errorf("Hijack in Handler: %v", err)
				return
			}
			if _, ok := c.(*net.TCPConn); !ok {
				// Verify it's not wrapped in some type.
				// Not strictly a go1 compat issue, but in practice it probably is.
				t.Errorf("type of hijacked conn is %T; want *net.TCPConn", c)
			}

	return 0, nil
}
func (w *WC) Close() error {
	return nil
}

func TestMakeFuncValidReturnAssignments(t *testing.T) {
	// reflect.Values returned from the wrapped function should be assignment-converted
	// to the types returned by the result of MakeFunc.

	// Concrete types should be promotable to interfaces they implement.
	var f func() error