MIRROR: javascript for 🐜's, a tiny runtime with big ambitions
legacy eventemitter action
+65
-5
+13
examples/spec/events.js
+13
examples/spec/events.js
···
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eeD.emit('ctx');
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test('EventEmitter listeners receive emitter as this', listenerThis, eeD);
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function LegacyEmitter() {
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EventEmitter.call(this);
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}
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LegacyEmitter.prototype = {};
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LegacyEmitter.prototype.__proto__ = EventEmitter.prototype;
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LegacyEmitter.prototype.constructor = LegacyEmitter;
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+
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const legacy = new LegacyEmitter();
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let legacyCount = 0;
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legacy.on('legacy', () => legacyCount++);
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legacy.emit('legacy');
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test('EventEmitter.call(this) initializes classic inherited receivers', legacyCount, 1);
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+
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console.log('\nEventTarget Tests\n');
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const et = new EventTarget();
+15
-5
src/modules/events.c
+15
-5
src/modules/events.c
···
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}
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static ant_value_t js_eventemitter_ctor(ant_t *js, ant_value_t *args, int nargs) {
331
-
if (vtype(js->new_target) == T_UNDEF)
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-
return js_mkerr_typed(js, JS_ERR_TYPE, "EventEmitter constructor requires 'new'");
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-
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ant_value_t this_obj = js_getthis(js);
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if (is_object_type(this_obj)) js_set_slot(this_obj, SLOT_BRAND, js_mknum(BRAND_EVENTEMITTER));
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-
return js_mkundef();
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+
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+
if (is_object_type(this_obj)) {
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js_set_slot(this_obj, SLOT_BRAND, js_mknum(BRAND_EVENTEMITTER));
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return this_obj;
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}
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+
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if (vtype(js->new_target) != T_UNDEF) {
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ant_value_t obj = js_mkobj(js);
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ant_value_t proto = js_instance_proto_from_new_target(js, g_eventemitter_proto);
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if (is_object_type(proto)) js_set_proto_init(obj, proto);
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js_set_slot(obj, SLOT_BRAND, js_mknum(BRAND_EVENTEMITTER));
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return obj;
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}
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+
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return js_mkerr_typed(js, JS_ERR_TYPE, "EventEmitter constructor requires an object receiver or 'new'");
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}
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static ant_value_t js_event_preventDefault(ant_t *js, ant_value_t *args, int nargs) {
+37
tests/test_eventemitter_function_call.cjs
+37
tests/test_eventemitter_function_call.cjs
···
1
+
const { EventEmitter } = require('events');
2
+
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function fail(message) {
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console.log(`FAIL: ${message}`);
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process.exit(1);
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}
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+
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function Program() {
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EventEmitter.call(this);
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}
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+
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Program.prototype = {};
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Program.prototype.__proto__ = EventEmitter.prototype;
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Program.prototype.constructor = Program;
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+
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const program = new Program();
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+
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if (!(program instanceof Program)) {
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fail('program should be an instance of Program');
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}
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+
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let seen = 0;
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program.on('tick', () => {
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seen++;
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});
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program.emit('tick');
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+
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if (seen !== 1) {
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fail('EventEmitter.call(this) should initialize event methods on custom receivers');
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}
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+
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const ee = EventEmitter.call({});
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if (typeof ee !== 'object') {
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fail('EventEmitter.call({}) should return the receiver object');
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}
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+
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console.log('PASS');