// the payload size and the internal leeway buffer size of 10MiB overflows, that we
// correctly return an error.
func TestMaxInt64ForMultipartFormMaxMemoryOverflow(t *testing.T) {
	run(t, testMaxInt64ForMultipartFormMaxMemoryOverflow)
}
func testMaxInt64ForMultipartFormMaxMemoryOverflow(t *testing.T, mode testMode) {
	payloadSize := 1 << 10
	cst := newClientServerTest(t, mode, HandlerFunc(func(rw ResponseWriter, req *Request) {