[fixup] tests for events proxy, adjust based on results

lib/events.js

@@ -87,34 +87,21 @@ EventEmitter.init = function() {
 const proxyEventsHandler = {
   deleteProperty({ emitter }, prop) {
     const events = emitter[kEvents];
-    if (events === undefined)
-      return false;
-    if (!events.has(prop) &&
-        typeof prop !== 'string' &&
-        typeof prop !== 'symbol')
-      prop = String(prop);
-    return events.delete(prop);
+    if (events !== undefined)
+      events.delete(prop);
+    return true;
   },
   get({ emitter }, prop) {
     const events = emitter[kEvents];
     if (events === undefined)
       return;
-    let value = events.get(prop);
-    if (value === undefined &&
-        typeof prop !== 'string' &&
-        typeof prop !== 'symbol')
-      value = events.get(String(prop));
-    return value;
+    return events.get(prop);
   },
   getOwnPropertyDescriptor({ emitter }, prop) {
     const events = emitter[kEvents];
     if (events === undefined)
       return undefined;
-    let value = events.get(prop);
-    if (value === undefined &&
-        typeof prop !== 'string' &&
-        typeof prop !== 'symbol')
-      value = events.get(String(prop));
+    const value = events.get(prop);
     if (value === undefined)
       return undefined;
     return {
@@ -131,22 +118,13 @@ const proxyEventsHandler = {
     const events = emitter[kEvents];
     if (events === undefined)
       return false;
-    let has = events.has(prop);
-    if (!has && typeof prop !== 'string' && typeof prop !== 'symbol')
-      has = events.has(String(prop));
-    return has;
+    return events.has(prop);
   },
   ownKeys({ emitter }) {
     const events = emitter[kEvents];
-    if (events === undefined)
+    if (events === undefined || events.size === 0)
       return [];
-    const keys = new Array(events.size);
-    var i = 0;
-    for (var [key] of events) {
-      keys[i++] = typeof key !== 'string' && typeof key !== 'symbol' ?
-        String(key) : key;
-    }
-    return keys;
+    return [...events.keys()];
   },
   set({ emitter }, prop, value) {
     let events = emitter[kEvents];
@@ -164,7 +142,8 @@ Object.defineProperty(EventEmitter.prototype, '_events', {
     const proxy = this[kEventsProxy];
     // The proxy target has to be an empty object with a single configurable
     // key, because of rules around Proxy handler.ownKeys behaviour
-    if (proxy === undefined)
+    if (proxy === undefined ||
+        this[kEventsProxy] === Object.getPrototypeOf(this)[kEventsProxy])
       return this[kEventsProxy] = new Proxy({ emitter: this },
                                             proxyEventsHandler);
     return proxy;

test/parallel/test-event-emitter-proxy.js

@@ -0,0 +1,43 @@
+'use strict';
+
+require('../common');
+const assert = require('assert');
+const EventEmitter = require('events');
+
+const _events = EventEmitter.prototype._events;
+
+const ee = new EventEmitter();
+const noop = () => {};
+
+assert.notStrictEqual(_events, ee._events);
+
+assert(!(ee._events instanceof Object));
+assert.notStrictEqual(ee._events, undefined);
+assert.deepStrictEqual(Object.keys(ee._events), []);
+assert.strictEqual(ee._events.foo, undefined);
+assert.doesNotThrow(() => delete ee._events.foo);
+assert.strictEqual('foo' in ee._events, false);
+assert.strictEqual(Object.getOwnPropertyDescriptor(ee._events, 'foo'),
+                   undefined);
+
+assert.doesNotThrow(() => ee._events.foo = noop);
+
+assert.strictEqual(ee._events.foo, noop);
+assert.deepStrictEqual(Object.keys(ee._events), ['foo']);
+assert.deepStrictEqual(ee.listeners('foo'), [noop]);
+assert.strictEqual('foo' in ee._events, true);
+assert.deepStrictEqual(Object.getOwnPropertyDescriptor(ee._events, 'foo'),
+                       {
+                         value: noop,
+                         writable: true,
+                         configurable: true,
+                         enumerable: true
+                       });
+
+assert.doesNotThrow(() => delete ee._events.foo);
+assert.strictEqual(ee._events.foo, undefined);
+assert.deepStrictEqual(Object.keys(ee._events), []);
+assert.strictEqual('foo' in ee._events, false);
+assert.strictEqual(ee.listenerCount('foo'), 0);
+assert.strictEqual(Object.getOwnPropertyDescriptor(ee._events, 'foo'),
+                   undefined);