1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/devtools/tests/mochitest/test_eventemitter_basic.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,179 @@
1.4 +<!DOCTYPE html>
1.5 +<!--
1.6 + Any copyright is dedicated to the Public Domain.
1.7 + http://creativecommons.org/publicdomain/zero/1.0/
1.8 +-->
1.9 +
1.10 +<html>
1.11 +
1.12 + <head>
1.13 + <meta charset="utf8">
1.14 + <title></title>
1.15 +
1.16 + <script type="application/javascript"
1.17 + src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
1.18 + <link rel="stylesheet" type="text/css"
1.19 + href="chrome://mochikit/content/tests/SimpleTest/test.css">
1.20 + </head>
1.21 +
1.22 + <body>
1.23 +
1.24 + <script type="application/javascript;version=1.8">
1.25 + "use strict";
1.26 +
1.27 + const { utils: Cu } = Components;
1.28 + const { Promise: promise } =
1.29 + Cu.import("resource://gre/modules/devtools/deprecated-sync-thenables.js", {});
1.30 + const { EventEmitter } =
1.31 + Cu.import("resource://gre/modules/devtools/event-emitter.js", {});
1.32 + const { Task } = Cu.import("resource://gre/modules/Task.jsm", {});
1.33 +
1.34 + SimpleTest.waitForExplicitFinish();
1.35 +
1.36 + testEmitter();
1.37 + testEmitter({});
1.38 +
1.39 + Task.spawn(testPromise)
1.40 + .then(null, ok.bind(null, false))
1.41 + .then(SimpleTest.finish);
1.42 +
1.43 + function testEmitter(aObject) {
1.44 + let emitter;
1.45 +
1.46 + if (aObject) {
1.47 + emitter = aObject;
1.48 + EventEmitter.decorate(emitter);
1.49 + } else {
1.50 + emitter = new EventEmitter();
1.51 + }
1.52 +
1.53 + ok(emitter, "We have an event emitter");
1.54 +
1.55 + emitter.on("next", next);
1.56 + emitter.emit("next", "abc", "def");
1.57 +
1.58 + let beenHere1 = false;
1.59 + function next(eventName, str1, str2) {
1.60 + is(eventName, "next", "Got event");
1.61 + is(str1, "abc", "Argument 1 is correct");
1.62 + is(str2, "def", "Argument 2 is correct");
1.63 +
1.64 + ok(!beenHere1, "first time in next callback");
1.65 + beenHere1 = true;
1.66 +
1.67 + emitter.off("next", next);
1.68 +
1.69 + emitter.emit("next");
1.70 +
1.71 + emitter.once("onlyonce", onlyOnce);
1.72 +
1.73 + emitter.emit("onlyonce");
1.74 + emitter.emit("onlyonce");
1.75 + }
1.76 +
1.77 + let beenHere2 = false;
1.78 + function onlyOnce() {
1.79 + ok(!beenHere2, "\"once\" listner has been called once");
1.80 + beenHere2 = true;
1.81 + emitter.emit("onlyonce");
1.82 +
1.83 + killItWhileEmitting();
1.84 + }
1.85 +
1.86 + function killItWhileEmitting() {
1.87 + function c1() {
1.88 + ok(true, "c1 called");
1.89 + }
1.90 + function c2() {
1.91 + ok(true, "c2 called");
1.92 + emitter.off("tick", c3);
1.93 + }
1.94 + function c3() {
1.95 + ok(false, "c3 should not be called");
1.96 + }
1.97 + function c4() {
1.98 + ok(true, "c4 called");
1.99 + }
1.100 +
1.101 + emitter.on("tick", c1);
1.102 + emitter.on("tick", c2);
1.103 + emitter.on("tick", c3);
1.104 + emitter.on("tick", c4);
1.105 +
1.106 + emitter.emit("tick");
1.107 +
1.108 + offAfterOnce();
1.109 + }
1.110 +
1.111 + function offAfterOnce() {
1.112 + let enteredC1 = false;
1.113 +
1.114 + function c1() {
1.115 + enteredC1 = true;
1.116 + }
1.117 +
1.118 + emitter.once("oao", c1);
1.119 + emitter.off("oao", c1);
1.120 +
1.121 + emitter.emit("oao");
1.122 +
1.123 + ok(!enteredC1, "c1 should not be called");
1.124 + }
1.125 + }
1.126 +
1.127 + function testPromise() {
1.128 + let emitter = new EventEmitter();
1.129 + let p = emitter.once("thing");
1.130 +
1.131 + // Check that the promise is only resolved once event though we
1.132 + // emit("thing") more than once
1.133 + let firstCallbackCalled = false;
1.134 + let check1 = p.then(arg => {
1.135 + is(firstCallbackCalled, false, "first callback called only once");
1.136 + firstCallbackCalled = true;
1.137 + is(arg, "happened", "correct arg in promise");
1.138 + return "rval from c1";
1.139 + });
1.140 +
1.141 + emitter.emit("thing", "happened", "ignored");
1.142 +
1.143 + // Check that the promise is resolved asynchronously
1.144 + let secondCallbackCalled = false;
1.145 + let check2 = p.then(arg => {
1.146 + ok(true, "second callback called");
1.147 + is(arg, "happened", "correct arg in promise");
1.148 + secondCallbackCalled = true;
1.149 + is(arg, "happened", "correct arg in promise (a second time)");
1.150 + return "rval from c2";
1.151 + });
1.152 +
1.153 + // Shouldn't call any of the above listeners
1.154 + emitter.emit("thing", "trashinate");
1.155 +
1.156 + // Check that we can still separate events with different names
1.157 + // and that it works with no parameters
1.158 + let pfoo = emitter.once("foo");
1.159 + let pbar = emitter.once("bar");
1.160 +
1.161 + let check3 = pfoo.then(arg => {
1.162 + ok(arg === undefined, "no arg for foo event");
1.163 + return "rval from c3";
1.164 + });
1.165 +
1.166 + pbar.then(() => {
1.167 + ok(false, "pbar should not be called");
1.168 + });
1.169 +
1.170 + emitter.emit("foo");
1.171 +
1.172 + is(secondCallbackCalled, false, "second callback not called yet");
1.173 +
1.174 + return promise.all([ check1, check2, check3 ]).then(args => {
1.175 + is(args[0], "rval from c1", "callback 1 done good");
1.176 + is(args[1], "rval from c2", "callback 2 done good");
1.177 + is(args[2], "rval from c3", "callback 3 done good");
1.178 + });
1.179 + }
1.180 + </script>
1.181 + </body>
1.182 +</html>
