			// 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 assert = require('assert');
			var EventEmitter = require('../');

			var e = new EventEmitter();

			e.once('hello', common.mustCall());

			e.emit('hello', 'a', 'b');
			e.emit('hello', 'a', 'b');
			e.emit('hello', 'a', 'b');
			e.emit('hello', 'a', 'b');

			function remove() {
			assert.fail('once->foo should not be emitted');
			}

			e.once('foo', remove);
			e.removeListener('foo', remove);
			e.emit('foo');

			e.once('e', common.mustCall(function() {
			e.emit('e');
			}));

			e.once('e', common.mustCall());

			e.emit('e');

			// Verify that the listener must be a function
			assert.throws(function() {
			var ee = new EventEmitter();

			ee.once('foo', null);
			}, /^TypeError: The "listener" argument must be of type Function. Received type object$/);

			{
			// once() has different code paths based on the number of arguments being
			// emitted. Verify that all of the cases are covered.
			var maxArgs = 4;

			for (var i = 0; i <= maxArgs; ++i) {
			var ee = new EventEmitter();
			var args = ['foo'];

			for (var j = 0; j < i; ++j)
			args.push(j);

			ee.once('foo', common.mustCall(function() {
			var params = Array.prototype.slice.call(arguments);
			var restArgs = args.slice(1);
			assert.ok(Array.isArray(params));
			assert.strictEqual(params.length, restArgs.length);
			for (var index = 0; index < params.length; index++) {
			var param = params[index];
			assert.strictEqual(param, restArgs[index]);
			}
			}));

			EventEmitter.prototype.emit.apply(ee, args);
			}
			}

rOACCT/node_modules/events/tests/once.js
66b5faac0b78paginated-inlines

once.js
View Options

rOACCT/node_modules/events/tests/once.js66b5faac0b78paginated-inlines

once.jsView Options

rOACCT/node_modules/events/tests/once.js
66b5faac0b78paginated-inlines

once.js
View Options