index.js
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'use strict';
module.exports = function (t, a) {
var x = t(), y, count, count2, count3, count4, test, listener1, listener2;
x.emit('none');
test = "Once: ";
count = 0;
x.once('foo', function (a1, a2, a3) {
a(this, x, test + "Context");
a.deep([a1, a2, a3], ['foo', x, 15], test + "Arguments");
++count;
});
x.emit('foobar');
a(count, 0, test + "Not invoked on other event");
x.emit('foo', 'foo', x, 15);
a(count, 1, test + "Emitted");
x.emit('foo');
a(count, 1, test + "Emitted once");
test = "On & Once: ";
count = 0;
x.on('foo', listener1 = function (a1, a2, a3) {
a(this, x, test + "Context");
a.deep([a1, a2, a3], ['foo', x, 15], test + "Arguments");
++count;
});
count2 = 0;
x.once('foo', listener2 = function (a1, a2, a3) {
a(this, x, test + "Context");
a.deep([a1, a2, a3], ['foo', x, 15], test + "Arguments");
++count2;
});
x.emit('foobar');
a(count, 0, test + "Not invoked on other event");
x.emit('foo', 'foo', x, 15);
a(count, 1, test + "Emitted");
x.emit('foo', 'foo', x, 15);
a(count, 2, test + "Emitted twice");
a(count2, 1, test + "Emitted once");
x.off('foo', listener1);
x.emit('foo');
a(count, 2, test + "Not emitter after off");
count = 0;
x.once('foo', listener1 = function () { ++count; });
x.off('foo', listener1);
x.emit('foo');
a(count, 0, "Once Off: Not emitted");
count = 0;
x.on('foo', listener2 = function () {});
x.once('foo', listener1 = function () { ++count; });
x.off('foo', listener1);
x.emit('foo');
a(count, 0, "Once Off (multi): Not emitted");
x.off('foo', listener2);
test = "Prototype Share: ";
y = Object.create(x);
count = 0;
count2 = 0;
count3 = 0;
count4 = 0;
x.on('foo', function () {
++count;
});
y.on('foo', function () {
++count2;
});
x.once('foo', function () {
++count3;
});
y.once('foo', function () {
++count4;
});
x.emit('foo');
a(count, 1, test + "x on count");
a(count2, 0, test + "y on count");
a(count3, 1, test + "x once count");
a(count4, 0, test + "y once count");
y.emit('foo');
a(count, 1, test + "x on count");
a(count2, 1, test + "y on count");
a(count3, 1, test + "x once count");
a(count4, 1, test + "y once count");
x.emit('foo');
a(count, 2, test + "x on count");
a(count2, 1, test + "y on count");
a(count3, 1, test + "x once count");
a(count4, 1, test + "y once count");
y.emit('foo');
a(count, 2, test + "x on count");
a(count2, 2, test + "y on count");
a(count3, 1, test + "x once count");
a(count4, 1, test + "y once count");
};