add hw2

node_modules/events/tests/subclass.js

@@ -0,0 +1,66 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var test = require('tape');
+var assert = require('assert');
+var EventEmitter = require('../').EventEmitter;
+var util = require('util');
+
+util.inherits(MyEE, EventEmitter);
+
+function MyEE(cb) {
+  this.once(1, cb);
+  this.emit(1);
+  this.removeAllListeners();
+  EventEmitter.call(this);
+}
+
+var myee = new MyEE(common.mustCall());
+
+
+util.inherits(ErrorEE, EventEmitter);
+function ErrorEE() {
+  this.emit('error', new Error('blerg'));
+}
+
+assert.throws(function() {
+  new ErrorEE();
+}, /blerg/);
+
+test.onFinish(function() {
+  assert.ok(!(myee._events instanceof Object));
+  assert.strictEqual(Object.keys(myee._events).length, 0);
+});
+
+
+function MyEE2() {
+  EventEmitter.call(this);
+}
+
+MyEE2.prototype = new EventEmitter();
+
+var ee1 = new MyEE2();
+var ee2 = new MyEE2();
+
+ee1.on('x', function() {});
+
+assert.strictEqual(ee2.listenerCount('x'), 0);