package link

import (
	"context"
	"testing"

	"github.com/nats-io/nats.go"
)

// 1768/AC1: a request dropped as a duplicate of one another builder runs marks nothing in hand: the claim is not made,
// so no mark is left behind to fail every later claim.
func TestADuplicateDropIsJudgedBeforeTheClaimSoLeavesNoMark(t *testing.T) {
	claims := 0
	m := &natsMachine{
		opts:      MachineOptions{Claim: func() bool { claims++; return true }},
		duplicate: func(context.Context, BuildRequest) string { return "ace is running it" },
	}
	if m.admit(context.Background(), &nats.Msg{}, BuildRequest{ID: "build-1"}) {
		t.Fatal("a duplicate was admitted")
	}
	if claims != 0 {
		t.Fatalf("a dropped duplicate was claimed %d times, which leaves the in-hand mark behind", claims)
	}
	m.duplicate = func(context.Context, BuildRequest) string { return "" }
	if !m.admit(context.Background(), &nats.Msg{}, BuildRequest{ID: "build-2"}) || claims != 1 {
		t.Fatalf("a request that is no duplicate was not claimed once: claims=%d", claims)
	}
}