michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: 'use strict';
michael@0: 
michael@0: const { on, once, off, emit, count } = require('sdk/event/core');
michael@0: const { LoaderWithHookedConsole } = require("sdk/test/loader");
michael@0: 
michael@0: exports['test add a listener'] = function(assert) {
michael@0:   let events = [ { name: 'event#1' }, 'event#2' ];
michael@0:   let target = { name: 'target' };
michael@0: 
michael@0:   on(target, 'message', function(message) {
michael@0:     assert.equal(this, target, 'this is a target object');
michael@0:     assert.equal(message, events.shift(), 'message is emitted event');
michael@0:   });
michael@0:   emit(target, 'message', events[0]);
michael@0:   emit(target, 'message', events[0]);
michael@0: };
michael@0: 
michael@0: exports['test that listener is unique per type'] = function(assert) {
michael@0:   let actual = []
michael@0:   let target = {}
michael@0:   function listener() { actual.push(1) }
michael@0:   on(target, 'message', listener);
michael@0:   on(target, 'message', listener);
michael@0:   on(target, 'message', listener);
michael@0:   on(target, 'foo', listener);
michael@0:   on(target, 'foo', listener);
michael@0: 
michael@0:   emit(target, 'message');
michael@0:   assert.deepEqual([ 1 ], actual, 'only one message listener added');
michael@0:   emit(target, 'foo');
michael@0:   assert.deepEqual([ 1, 1 ], actual, 'same listener added for other event');
michael@0: };
michael@0: 
michael@0: exports['test event type matters'] = function(assert) {
michael@0:   let target = { name: 'target' }
michael@0:   on(target, 'message', function() {
michael@0:     assert.fail('no event is expected');
michael@0:   });
michael@0:   on(target, 'done', function() {
michael@0:     assert.pass('event is emitted');
michael@0:   });
michael@0:   emit(target, 'foo')
michael@0:   emit(target, 'done');
michael@0: };
michael@0: 
michael@0: exports['test all arguments are pasesd'] = function(assert) {
michael@0:   let foo = { name: 'foo' }, bar = 'bar';
michael@0:   let target = { name: 'target' };
michael@0:   on(target, 'message', function(a, b) {
michael@0:     assert.equal(a, foo, 'first argument passed');
michael@0:     assert.equal(b, bar, 'second argument passed');
michael@0:   });
michael@0:   emit(target, 'message', foo, bar);
michael@0: };
michael@0: 
michael@0: exports['test no side-effects in emit'] = function(assert) {
michael@0:   let target = { name: 'target' };
michael@0:   on(target, 'message', function() {
michael@0:     assert.pass('first listener is called');
michael@0:     on(target, 'message', function() {
michael@0:       assert.fail('second listener is called');
michael@0:     });
michael@0:   });
michael@0:   emit(target, 'message');
michael@0: };
michael@0: 
michael@0: exports['test can remove next listener'] = function(assert) {
michael@0:   let target = { name: 'target' };
michael@0:   function fail() assert.fail('Listener should be removed');
michael@0: 
michael@0:   on(target, 'data', function() {
michael@0:     assert.pass('first litener called');
michael@0:     off(target, 'data', fail);
michael@0:   });
michael@0:   on(target, 'data', fail);
michael@0: 
michael@0:   emit(target, 'data', 'hello');
michael@0: };
michael@0: 
michael@0: exports['test order of propagation'] = function(assert) {
michael@0:   let actual = [];
michael@0:   let target = { name: 'target' };
michael@0:   on(target, 'message', function() { actual.push(1); });
michael@0:   on(target, 'message', function() { actual.push(2); });
michael@0:   on(target, 'message', function() { actual.push(3); });
michael@0:   emit(target, 'message');
michael@0:   assert.deepEqual([ 1, 2, 3 ], actual, 'called in order they were added');
michael@0: };
michael@0: 
michael@0: exports['test remove a listener'] = function(assert) {
michael@0:   let target = { name: 'target' };
michael@0:   let actual = [];
michael@0:   on(target, 'message', function listener() {
michael@0:     actual.push(1);
michael@0:     on(target, 'message', function() {
michael@0:       off(target, 'message', listener);
michael@0:       actual.push(2);
michael@0:     })
michael@0:   });
michael@0: 
michael@0:   emit(target, 'message');
michael@0:   assert.deepEqual([ 1 ], actual, 'first listener called');
michael@0:   emit(target, 'message');
michael@0:   assert.deepEqual([ 1, 1, 2 ], actual, 'second listener called');
michael@0: 
michael@0:   emit(target, 'message');
michael@0:   assert.deepEqual([ 1, 1, 2, 2, 2 ], actual, 'first listener removed');
michael@0: };
michael@0: 
michael@0: exports['test remove all listeners for type'] = function(assert) {
michael@0:   let actual = [];
michael@0:   let target = { name: 'target' }
michael@0:   on(target, 'message', function() { actual.push(1); });
michael@0:   on(target, 'message', function() { actual.push(2); });
michael@0:   on(target, 'message', function() { actual.push(3); });
michael@0:   on(target, 'bar', function() { actual.push('b') });
michael@0:   off(target, 'message');
michael@0: 
michael@0:   emit(target, 'message');
michael@0:   emit(target, 'bar');
michael@0: 
michael@0:   assert.deepEqual([ 'b' ], actual, 'all message listeners were removed');
michael@0: };
michael@0: 
michael@0: exports['test remove all listeners'] = function(assert) {
michael@0:   let actual = [];
michael@0:   let target = { name: 'target' }
michael@0:   on(target, 'message', function() { actual.push(1); });
michael@0:   on(target, 'message', function() { actual.push(2); });
michael@0:   on(target, 'message', function() { actual.push(3); });
michael@0:   on(target, 'bar', function() { actual.push('b') });
michael@0:   off(target);
michael@0: 
michael@0:   emit(target, 'message');
michael@0:   emit(target, 'bar');
michael@0: 
michael@0:   assert.deepEqual([], actual, 'all listeners events were removed');
michael@0: };
michael@0: 
michael@0: exports['test falsy arguments are fine'] = function(assert) {
michael@0:   let type, listener, actual = [];
michael@0:   let target = { name: 'target' }
michael@0:   on(target, 'bar', function() { actual.push(0) });
michael@0: 
michael@0:   off(target, 'bar', listener);
michael@0:   emit(target, 'bar');
michael@0:   assert.deepEqual([ 0 ], actual, '3rd bad ard will keep listeners');
michael@0: 
michael@0:   off(target, type);
michael@0:   emit(target, 'bar');
michael@0:   assert.deepEqual([ 0, 0 ], actual, '2nd bad arg will keep listener');
michael@0: 
michael@0:   off(target, type, listener);
michael@0:   emit(target, 'bar');
michael@0:   assert.deepEqual([ 0, 0, 0 ], actual, '2nd&3rd bad args will keep listener');
michael@0: };
michael@0: 
michael@0: exports['test error handling'] = function(assert) {
michael@0:   let target = Object.create(null);
michael@0:   let error = Error('boom!');
michael@0: 
michael@0:   on(target, 'message', function() { throw error; })
michael@0:   on(target, 'error', function(boom) {
michael@0:     assert.equal(boom, error, 'thrown exception causes error event');
michael@0:   });
michael@0:   emit(target, 'message');
michael@0: };
michael@0: 
michael@0: exports['test unhandled exceptions'] = function(assert) {
michael@0:   let exceptions = [];
michael@0:   let { loader, messages } = LoaderWithHookedConsole(module);
michael@0: 
michael@0:   let { emit, on } = loader.require('sdk/event/core');
michael@0:   let target = {};
michael@0:   let boom = Error('Boom!');
michael@0:   let drax = Error('Draax!!');
michael@0: 
michael@0:   on(target, 'message', function() { throw boom; });
michael@0: 
michael@0:   emit(target, 'message');
michael@0:   assert.equal(messages.length, 1, 'Got the first exception');
michael@0:   assert.equal(messages[0].type, 'exception', 'The console message is exception');
michael@0:   assert.ok(~String(messages[0].msg).indexOf('Boom!'),
michael@0:             'unhandled exception is logged');
michael@0: 
michael@0:   on(target, 'error', function() { throw drax; });
michael@0:   emit(target, 'message');
michael@0:   assert.equal(messages.length, 2, 'Got the second exception');
michael@0:   assert.equal(messages[1].type, 'exception', 'The console message is exception');
michael@0:   assert.ok(~String(messages[1].msg).indexOf('Draax!'),
michael@0:             'error in error handler is logged');
michael@0: };
michael@0: 
michael@0: exports['test unhandled errors'] = function(assert) {
michael@0:   let exceptions = [];
michael@0:   let { loader, messages } = LoaderWithHookedConsole(module);
michael@0: 
michael@0:   let { emit, on } = loader.require('sdk/event/core');
michael@0:   let target = {};
michael@0:   let boom = Error('Boom!');
michael@0: 
michael@0:   emit(target, 'error', boom);
michael@0:   assert.equal(messages.length, 1, 'Error was logged');
michael@0:   assert.equal(messages[0].type, 'exception', 'The console message is exception');
michael@0:   assert.ok(~String(messages[0].msg).indexOf('Boom!'),
michael@0:             'unhandled exception is logged');
michael@0: };
michael@0: 
michael@0: 
michael@0: exports['test count'] = function(assert) {
michael@0:   let target = {};
michael@0: 
michael@0:   assert.equal(count(target, 'foo'), 0, 'no listeners for "foo" events');
michael@0:   on(target, 'foo', function() {});
michael@0:   assert.equal(count(target, 'foo'), 1, 'listener registered');
michael@0:   on(target, 'foo', function() {}, 2, 'another listener registered');
michael@0:   off(target)
michael@0:   assert.equal(count(target, 'foo'), 0, 'listeners unregistered');
michael@0: };
michael@0: 
michael@0: exports['test listen to all events'] = function(assert) {
michael@0:   let actual = [];
michael@0:   let target = {};
michael@0: 
michael@0:   on(target, 'foo', message => actual.push(message));
michael@0:   on(target, '*', (type, ...message) => {
michael@0:     actual.push([type].concat(message));
michael@0:   });
michael@0:  
michael@0:   emit(target, 'foo', 'hello');
michael@0:   assert.equal(actual[0], 'hello',
michael@0:     'non-wildcard listeners still work');
michael@0:   assert.deepEqual(actual[1], ['foo', 'hello'],
michael@0:     'wildcard listener called');
michael@0: 
michael@0:   emit(target, 'bar', 'goodbye');
michael@0:   assert.deepEqual(actual[2], ['bar', 'goodbye'],
michael@0:     'wildcard listener called for unbound event name');
michael@0: };
michael@0: 
michael@0: require('test').run(exports);