379 lines
9.5 KiB
JavaScript
379 lines
9.5 KiB
JavaScript
'use strict';
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var test = require('tap').test
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, EventEmitter = require('events').EventEmitter
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, cls = require('../context.js')
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;
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test("event emitters bound to CLS context", function (t) {
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t.plan(13);
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t.test("handler registered in context, emit out of context", function (t) {
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t.plan(1);
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var n = cls.createNamespace('in')
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, ee = new EventEmitter()
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;
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n.run(function () {
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n.set('value', 'hello');
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n.bindEmitter(ee);
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ee.on('event', function () {
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t.equal(n.get('value'), 'hello', "value still set in EE.");
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cls.destroyNamespace('in');
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});
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});
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ee.emit('event');
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});
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t.test("once handler registered in context", function (t) {
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t.plan(1);
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var n = cls.createNamespace('inOnce')
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, ee = new EventEmitter()
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;
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n.run(function () {
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n.set('value', 'hello');
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n.bindEmitter(ee);
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ee.once('event', function () {
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t.equal(n.get('value'), 'hello', "value still set in EE.");
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cls.destroyNamespace('inOnce');
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});
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});
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ee.emit('event');
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});
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t.test("handler registered out of context, emit in context", function (t) {
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t.plan(1);
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var n = cls.createNamespace('out')
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, ee = new EventEmitter()
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;
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ee.on('event', function () {
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t.equal(n.get('value'), 'hello', "value still set in EE.");
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cls.destroyNamespace('out');
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});
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n.run(function () {
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n.set('value', 'hello');
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n.bindEmitter(ee);
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ee.emit('event');
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});
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});
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t.test("once handler registered out of context", function (t) {
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t.plan(1);
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var n = cls.createNamespace('outOnce')
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, ee = new EventEmitter()
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;
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ee.once('event', function () {
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t.equal(n.get('value'), 'hello', "value still set in EE.");
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cls.destroyNamespace('outOnce');
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});
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n.run(function () {
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n.set('value', 'hello');
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n.bindEmitter(ee);
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ee.emit('event');
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});
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});
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t.test("handler registered out of context, emit out of context", function (t) {
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t.plan(1);
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var n = cls.createNamespace('out')
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, ee = new EventEmitter()
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;
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ee.on('event', function () {
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t.equal(n.get('value'), undefined, "no context.");
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cls.destroyNamespace('out');
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});
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n.run(function () {
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n.set('value', 'hello');
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n.bindEmitter(ee);
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});
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ee.emit('event');
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});
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t.test("once handler registered out of context on Readable", function (t) {
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var Readable = require('stream').Readable;
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if (Readable) {
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t.plan(12);
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var n = cls.createNamespace('outOnceReadable')
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, re = new Readable()
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;
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re._read = function () {};
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t.ok(n.name, "namespace has a name");
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t.equal(n.name, 'outOnceReadable', "namespace has a name");
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re.once('data', function (data) {
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t.equal(n.get('value'), 'hello', "value still set in EE");
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t.equal(data, 'blah', "emit still works");
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cls.destroyNamespace('outOnceReadable');
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});
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n.run(function () {
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n.set('value', 'hello');
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t.notOk(re.emit.__wrapped, "emit is not wrapped");
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t.notOk(re.on.__wrapped, "on is not wrapped");
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t.notOk(re.addListener.__wrapped, "addListener is not wrapped");
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n.bindEmitter(re);
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t.ok(re.emit.__wrapped, "emit is wrapped");
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t.ok(re.on.__wrapped, "on is wrapped");
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t.ok(re.addListener.__wrapped, "addListener is wrapped");
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t.equal(typeof re._events.data, 'function', 'only the one data listener');
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t.notOk(re._events.data['context@outOnceReadable'], "context isn't on listener");
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re.emit('data', 'blah');
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});
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}
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else {
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t.comment("this test requires node 0.10+");
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t.end();
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}
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});
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t.test("emitter with newListener that removes handler", function (t) {
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t.plan(3);
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var n = cls.createNamespace('newListener')
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, ee = new EventEmitter()
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;
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// add monkeypatching to ee
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n.bindEmitter(ee);
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function listen() {
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ee.on('data', function (chunk) {
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t.equal(chunk, 'chunk', 'listener still works');
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});
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}
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ee.on('newListener', function handler(event) {
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if (event !== 'data') return;
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this.removeListener('newListener', handler);
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t.notOk(this.listeners('newListener').length, 'newListener was removed');
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process.nextTick(listen);
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});
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ee.on('drain', function (chunk) {
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process.nextTick(function () {
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ee.emit('data', chunk);
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});
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});
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ee.on('data', function (chunk) {
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t.equal(chunk, 'chunk', 'got data event');
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cls.destroyNamespace('newListener');
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});
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ee.emit('drain', 'chunk');
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});
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t.test("handler registered in context on Readable", function (t) {
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var Readable = require('stream').Readable;
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if (Readable) {
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t.plan(12);
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var n = cls.createNamespace('outOnReadable')
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, re = new Readable()
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;
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re._read = function () {};
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t.ok(n.name, "namespace has a name");
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t.equal(n.name, 'outOnReadable', "namespace has a name");
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n.run(function () {
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n.set('value', 'hello');
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n.bindEmitter(re);
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t.ok(re.emit.__wrapped, "emit is wrapped");
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t.ok(re.on.__wrapped, "on is wrapped");
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t.ok(re.addListener.__wrapped, "addListener is wrapped");
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re.on('data', function (data) {
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t.equal(n.get('value'), 'hello', "value still set in EE");
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t.equal(data, 'blah', "emit still works");
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cls.destroyNamespace('outOnReadable');
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});
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});
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t.ok(re.emit.__wrapped, "emit is still wrapped");
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t.ok(re.on.__wrapped, "on is still wrapped");
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t.ok(re.addListener.__wrapped, "addListener is still wrapped");
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t.equal(typeof re._events.data, 'function', 'only the one data listener');
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t.ok(re._events.data['cls@contexts']['context@outOnReadable'],
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"context is bound to listener");
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re.emit('data', 'blah');
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}
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else {
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t.comment("this test requires node 0.10+");
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t.end();
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}
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});
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t.test("handler added but used entirely out of context", function (t) {
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t.plan(2);
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var n = cls.createNamespace('none')
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, ee = new EventEmitter()
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;
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n.run(function () {
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n.set('value', 'hello');
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n.bindEmitter(ee);
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});
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ee.on('event', function () {
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t.ok(n, "n is set");
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t.notOk(n.get('value'), "value shouldn't be visible");
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cls.destroyNamespace('none');
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});
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ee.emit('event');
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});
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t.test("handler added but no listeners registered", function (t) {
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t.plan(3);
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var http = require('http')
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, n = cls.createNamespace('no_listener')
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;
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// only fails on Node < 0.10
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var server = http.createServer(function (req, res) {
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n.bindEmitter(req);
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t.doesNotThrow(function () {
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req.emit('event');
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});
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res.writeHead(200, {"Content-Length" : 4});
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res.end('WORD');
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});
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server.listen(8080);
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http.get('http://localhost:8080/', function (res) {
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t.equal(res.statusCode, 200, "request came back OK");
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res.setEncoding('ascii');
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res.on('data', function (body) {
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t.equal(body, 'WORD');
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server.close();
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cls.destroyNamespace('no_listener');
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});
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});
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});
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t.test("listener with parameters added but not bound to context", function (t) {
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t.plan(2);
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var ee = new EventEmitter()
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, n = cls.createNamespace('param_list')
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;
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function sent(value) {
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t.equal(value, 3, "sent value is correct");
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cls.destroyNamespace('param_list');
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}
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ee.on('send', sent);
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n.bindEmitter(ee);
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t.doesNotThrow(function () {
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ee.emit('send', 3);
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});
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});
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t.test("listener that throws doesn't leave removeListener wrapped", function (t) {
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t.plan(4);
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var ee = new EventEmitter()
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, n = cls.createNamespace('kaboom')
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;
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n.bindEmitter(ee);
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function kaboom() {
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throw new Error('whoops');
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}
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n.run(function () {
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ee.on('bad', kaboom);
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t.throws(function () { ee.emit('bad'); });
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t.equal(typeof ee.removeListener, 'function', 'removeListener is still there');
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t.notOk(ee.removeListener.__wrapped, "removeListener got unwrapped");
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t.equal(ee._events.bad, kaboom, "listener isn't still bound");
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cls.destroyNamespace('kaboom');
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});
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});
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t.test("emitter bound to multiple namespaces handles them correctly", function (t) {
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t.plan(8);
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var ee = new EventEmitter()
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, ns1 = cls.createNamespace('1')
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, ns2 = cls.createNamespace('2')
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;
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// emulate an incoming data emitter
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setTimeout(function () {
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ee.emit('data', 'hi');
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}, 10);
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t.doesNotThrow(function () { ns1.bindEmitter(ee); });
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t.doesNotThrow(function () { ns2.bindEmitter(ee); });
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ns1.run(function () {
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ns2.run(function () {
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ns1.set('name', 'tom1');
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ns2.set('name', 'tom2');
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t.doesNotThrow(function () { ns1.bindEmitter(ee); });
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t.doesNotThrow(function () { ns2.bindEmitter(ee); });
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ns1.run(function () {
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process.nextTick(function () {
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t.equal(ns1.get('name'), 'tom1', "ns1 value correct");
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t.equal(ns2.get('name'), 'tom2', "ns2 value correct");
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ns1.set('name', 'bob');
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ns2.set('name', 'alice');
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ee.on('data', function () {
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t.equal(ns1.get('name'), 'bob', "ns1 value bound onto emitter");
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t.equal(ns2.get('name'), 'alice', "ns2 value bound onto emitter");
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});
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});
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});
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});
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});
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});
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});
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