gnome-shell/tests/unit/signalTracker.js

// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-

// Test cases for version comparison

import 'resource:///org/gnome/shell/ui/environment.js';
import GObject from 'gi://GObject';

const JsUnit = imports.jsUnit;
import * as Signals from 'resource:///org/gnome/shell/misc/signals.js';

import {TransientSignalHolder, registerDestroyableType} from 'resource:///org/gnome/shell/misc/signalTracker.js';

const Destroyable = GObject.registerClass({
    Signals: {'destroy': {}},
}, class Destroyable extends GObject.Object {});
registerDestroyableType(Destroyable);

const GObjectEmitter = GObject.registerClass({
    Signals: {'signal': {}},
}, class GObjectEmitter extends Destroyable {});

const emitter1 = new Signals.EventEmitter();
const emitter2 = new GObjectEmitter();

const tracked1 = new Destroyable();
const tracked2 = {};

let transientHolder;
let count = 0;
const handler = () => count++;

emitter1.connectObject('signal', handler, tracked1);
emitter2.connectObject('signal', handler, tracked1);

emitter1.connectObject('signal', handler, tracked2);
emitter2.connectObject('signal', handler, tracked2);

JsUnit.assertEquals(count, 0);

emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 4);

tracked1.emit('destroy');

emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 6);

emitter1.disconnectObject(tracked2);
emitter2.emit('destroy');

emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 6);

emitter1.connectObject(
    'signal', handler,
    'signal', handler, GObject.ConnectFlags.AFTER,
    tracked1);
emitter2.connectObject(
    'signal', handler,
    'signal', handler, GObject.ConnectFlags.AFTER,
    tracked1);

emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 10);

tracked1.emit('destroy');
emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 10);

emitter1.connectObject('signal', handler, tracked1);
emitter2.connectObject('signal', handler, tracked1);

transientHolder = new TransientSignalHolder(tracked1);

emitter1.connectObject('signal', handler, transientHolder);
emitter2.connectObject('signal', handler, transientHolder);

emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 14);

transientHolder.destroy();

emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 16);

transientHolder = new TransientSignalHolder(tracked1);

emitter1.connectObject('signal', handler, transientHolder);
emitter2.connectObject('signal', handler, transientHolder);

emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 20);

tracked1.emit('destroy');
emitter1.emit('signal');
emitter2.emit('signal');

JsUnit.assertEquals(count, 20);