//go:build xturbo_poison

package xturbo

import "testing"

// TestPoisonRetainedViews keeps Reply.Raw and Event.Tail past their callback
// (a lifetime bug) and checks the runtime overwrote them.
func TestPoisonRetainedViews(t *testing.T) {
	c, srv := dispatchConn(t)
	var raw, tail []byte
	h := Handler{
		OnReply: func(r *Reply) { raw = r.Raw },
		OnEvent: func(ev *Event) { tail = ev.Tail },
	}
	stream := append(pktReply(1, 64), pktXGE(2, 1, 64)...)
	expect(t, c, 1, 3, 4)
	feed(t, c, srv, stream, &h)
	if len(raw) != 96 || len(tail) != 64 {
		t.Fatal(len(raw), len(tail))
	}
	for _, p := range [][]byte{raw, tail} {
		for i, v := range p {
			if v != 0xa5 {
				t.Fatalf("retained byte %d = %#x, want poison", i, v)
			}
		}
	}

	// Growth poisons the old ring too.
	feed(t, c, srv, pktReply(3, 8), &h)
	old := c.rb
	feed(t, c, srv, pktReply(4, 200<<10), &h)
	if &old[0] == &c.rb[0] || old[0] != 0xa5 || old[len(old)-1] != 0xa5 {
		t.Fatal("old ring not poisoned after growth")
	}
}