The Tor Browser: comparison addon-sdk/source/test/test-event-core.js

comparison: addon-sdk/source/test/test-event-core.js

addon-sdk/source/test/test-event-core.js

changeset 0: 6474c204b198

equal deleted inserted replaced

--1:000000000000
+:1d3a0cf042a9
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+'use strict';
+const { on, once, off, emit, count } = require('sdk/event/core');
+const { LoaderWithHookedConsole } = require("sdk/test/loader");
+exports['test add a listener'] = function(assert) {
+let events = [ { name: 'event#1' }, 'event#2' ];
+let target = { name: 'target' };
+on(target, 'message', function(message) {
+assert.equal(this, target, 'this is a target object');
+assert.equal(message, events.shift(), 'message is emitted event');
+});
+emit(target, 'message', events[0]);
+emit(target, 'message', events[0]);
+};
+exports['test that listener is unique per type'] = function(assert) {
+let actual = []
+let target = {}
+function listener() { actual.push(1) }
+on(target, 'message', listener);
+on(target, 'message', listener);
+on(target, 'message', listener);
+on(target, 'foo', listener);
+on(target, 'foo', listener);
+emit(target, 'message');
+assert.deepEqual([ 1 ], actual, 'only one message listener added');
+emit(target, 'foo');
+assert.deepEqual([ 1, 1 ], actual, 'same listener added for other event');
+};
+exports['test event type matters'] = function(assert) {
+let target = { name: 'target' }
+on(target, 'message', function() {
+assert.fail('no event is expected');
+});
+on(target, 'done', function() {
+assert.pass('event is emitted');
+});
+emit(target, 'foo')
+emit(target, 'done');
+};
+exports['test all arguments are pasesd'] = function(assert) {
+let foo = { name: 'foo' }, bar = 'bar';
+let target = { name: 'target' };
+on(target, 'message', function(a, b) {
+assert.equal(a, foo, 'first argument passed');
+assert.equal(b, bar, 'second argument passed');
+});
+emit(target, 'message', foo, bar);
+};
+exports['test no side-effects in emit'] = function(assert) {
+let target = { name: 'target' };
+on(target, 'message', function() {
+assert.pass('first listener is called');
+on(target, 'message', function() {
+assert.fail('second listener is called');
+});
+});
+emit(target, 'message');
+};
+exports['test can remove next listener'] = function(assert) {
+let target = { name: 'target' };
+function fail() assert.fail('Listener should be removed');
+on(target, 'data', function() {
+assert.pass('first litener called');
+off(target, 'data', fail);
+});
+on(target, 'data', fail);
+emit(target, 'data', 'hello');
+};
+exports['test order of propagation'] = function(assert) {
+let actual = [];
+let target = { name: 'target' };
+on(target, 'message', function() { actual.push(1); });
+on(target, 'message', function() { actual.push(2); });
+on(target, 'message', function() { actual.push(3); });
+emit(target, 'message');
+assert.deepEqual([ 1, 2, 3 ], actual, 'called in order they were added');
+};
+exports['test remove a listener'] = function(assert) {
+let target = { name: 'target' };
+let actual = [];
+on(target, 'message', function listener() {
+actual.push(1);
+on(target, 'message', function() {
+off(target, 'message', listener);
+actual.push(2);
+})
+});
+emit(target, 'message');
+assert.deepEqual([ 1 ], actual, 'first listener called');
+emit(target, 'message');
+assert.deepEqual([ 1, 1, 2 ], actual, 'second listener called');
+emit(target, 'message');
+assert.deepEqual([ 1, 1, 2, 2, 2 ], actual, 'first listener removed');
+};
+exports['test remove all listeners for type'] = function(assert) {
+let actual = [];
+let target = { name: 'target' }
+on(target, 'message', function() { actual.push(1); });
+on(target, 'message', function() { actual.push(2); });
+on(target, 'message', function() { actual.push(3); });
+on(target, 'bar', function() { actual.push('b') });
+off(target, 'message');
+emit(target, 'message');
+emit(target, 'bar');
+assert.deepEqual([ 'b' ], actual, 'all message listeners were removed');
+};
+exports['test remove all listeners'] = function(assert) {
+let actual = [];
+let target = { name: 'target' }
+on(target, 'message', function() { actual.push(1); });
+on(target, 'message', function() { actual.push(2); });
+on(target, 'message', function() { actual.push(3); });
+on(target, 'bar', function() { actual.push('b') });
+off(target);
+emit(target, 'message');
+emit(target, 'bar');
+assert.deepEqual([], actual, 'all listeners events were removed');
+};
+exports['test falsy arguments are fine'] = function(assert) {
+let type, listener, actual = [];
+let target = { name: 'target' }
+on(target, 'bar', function() { actual.push(0) });
+off(target, 'bar', listener);
+emit(target, 'bar');
+assert.deepEqual([ 0 ], actual, '3rd bad ard will keep listeners');
+off(target, type);
+emit(target, 'bar');
+assert.deepEqual([ 0, 0 ], actual, '2nd bad arg will keep listener');
+off(target, type, listener);
+emit(target, 'bar');
+assert.deepEqual([ 0, 0, 0 ], actual, '2nd&3rd bad args will keep listener');
+};
+exports['test error handling'] = function(assert) {
+let target = Object.create(null);
+let error = Error('boom!');
+on(target, 'message', function() { throw error; })
+on(target, 'error', function(boom) {
+assert.equal(boom, error, 'thrown exception causes error event');
+});
+emit(target, 'message');
+};
+exports['test unhandled exceptions'] = function(assert) {
+let exceptions = [];
+let { loader, messages } = LoaderWithHookedConsole(module);
+let { emit, on } = loader.require('sdk/event/core');
+let target = {};
+let boom = Error('Boom!');
+let drax = Error('Draax!!');
+on(target, 'message', function() { throw boom; });
+emit(target, 'message');
+assert.equal(messages.length, 1, 'Got the first exception');
+assert.equal(messages[0].type, 'exception', 'The console message is exception');
+assert.ok(~String(messages[0].msg).indexOf('Boom!'),
+'unhandled exception is logged');
+on(target, 'error', function() { throw drax; });
+emit(target, 'message');
+assert.equal(messages.length, 2, 'Got the second exception');
+assert.equal(messages[1].type, 'exception', 'The console message is exception');
+assert.ok(~String(messages[1].msg).indexOf('Draax!'),
+'error in error handler is logged');
+};
+exports['test unhandled errors'] = function(assert) {
+let exceptions = [];
+let { loader, messages } = LoaderWithHookedConsole(module);
+let { emit, on } = loader.require('sdk/event/core');
+let target = {};
+let boom = Error('Boom!');
+emit(target, 'error', boom);
+assert.equal(messages.length, 1, 'Error was logged');
+assert.equal(messages[0].type, 'exception', 'The console message is exception');
+assert.ok(~String(messages[0].msg).indexOf('Boom!'),
+'unhandled exception is logged');
+};
+exports['test count'] = function(assert) {
+let target = {};
+assert.equal(count(target, 'foo'), 0, 'no listeners for "foo" events');
+on(target, 'foo', function() {});
+assert.equal(count(target, 'foo'), 1, 'listener registered');
+on(target, 'foo', function() {}, 2, 'another listener registered');
+off(target)
+assert.equal(count(target, 'foo'), 0, 'listeners unregistered');
+};
+exports['test listen to all events'] = function(assert) {
+let actual = [];
+let target = {};
+on(target, 'foo', message => actual.push(message));
+on(target, '*', (type, ...message) => {
+actual.push([type].concat(message));
+});
+emit(target, 'foo', 'hello');
+assert.equal(actual[0], 'hello',
+'non-wildcard listeners still work');
+assert.deepEqual(actual[1], ['foo', 'hello'],
+'wildcard listener called');
+emit(target, 'bar', 'goodbye');
+assert.deepEqual(actual[2], ['bar', 'goodbye'],
+'wildcard listener called for unbound event name');
+};
+require('test').run(exports);