// SPDX-FileCopyrightText: 2026 Echolot contributors
// SPDX-License-Identifier: GPL-3.0-or-later

package store

import "testing"

// The empty account must never match. Devices nobody has signed in on are not a group — they are
// unrelated devices that share the absence of an owner — and treating that as an account would
// let any anonymous device read every other anonymous device's runs.
func TestTheEmptyAccountIsNotAGroup(t *testing.T) {
	s, err := Open(t.TempDir())
	if err != nil {
		t.Fatal(err)
	}
	for _, id := range []string{"anon-1", "anon-2"} {
		s.data.Devices = append(s.data.Devices, Device{ID: id})
	}
	s.data.Devices = append(s.data.Devices,
		Device{ID: "mine-1", AccountID: "iss#me"},
		Device{ID: "mine-2", AccountID: "iss#me"},
		Device{ID: "theirs", AccountID: "iss#them"})

	if got := s.DeviceIDsForAccount(""); len(got) != 0 {
		t.Fatalf("the empty account matched %v", got)
	}
	if got := s.DeviceIDsForAccount("iss#me"); len(got) != 2 {
		t.Fatalf("account has %v, want both of its devices", got)
	}
	if got := s.DeviceIDsForAccount("iss#them"); len(got) != 1 || got[0] != "theirs" {
		t.Fatalf("wrong devices for the other account: %v", got)
	}
}