//go:build integration

package main

import "testing"

func TestEachSendToANodeIsOneHigherAndReadable(t *testing.T) {
	open := aMesh(t)
	record, err := open.inventory.NodeByName(t.Context(), "anchor")
	if err != nil {
		t.Fatal(err)
	}
	// Sent nothing since numbering existed: what it would be sent is composed with zero, which is
	// not on the wire, which is what it was actually sent.
	if n, err := open.inventory.Sequence(t.Context(), record.ID); err != nil || n != 0 {
		t.Fatalf("a fresh node reads sequence %d, %v", n, err)
	}
	first, err := open.inventory.NextSequence(t.Context(), record.ID)
	if err != nil {
		t.Fatal(err)
	}
	second, err := open.inventory.NextSequence(t.Context(), record.ID)
	if err != nil {
		t.Fatal(err)
	}
	if first != 1 || second != 2 {
		t.Fatalf("two sends were numbered %d and %d", first, second)
	}
	// And the read path sees the last one taken, so the comparison composes what was sent.
	if n, err := open.inventory.Sequence(t.Context(), record.ID); err != nil || n != 2 {
		t.Fatalf("after two sends the node reads sequence %d, %v", n, err)
	}
	// Another node counts on its own.
	other, err := open.inventory.NodeByName(t.Context(), "laptop")
	if err != nil {
		t.Fatal(err)
	}
	if n, err := open.inventory.NextSequence(t.Context(), other.ID); err != nil || n != 1 {
		t.Fatalf("a second node's first send was numbered %d, %v", n, err)
	}
}