The Tor Browser: addon-sdk/source/test/test-event-utils.js@b8a032363ba2 (annotated)

addon-sdk/source/test/test-event-utils.js@b8a032363ba2 (annotated)

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

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* 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, emit } = require("sdk/event/core");
 const { filter, map, merge, expand, pipe, stripListeners } = require("sdk/event/utils");
 const $ = require("./event/helpers");
 function isEven(x) !(x % 2)
 function inc(x) x + 1
 exports["test filter events"] = function(assert) {
   let input = {};
   let evens = filter(input, isEven);
   let actual = [];
   on(evens, "data", function(e) actual.push(e));
   [1, 2, 3, 4, 5, 6, 7].forEach(function(x) emit(input, "data", x));
   assert.deepEqual(actual, [2, 4, 6], "only even numbers passed through");
 };
 exports["test filter emits"] = $.emits(function(input, assert) {
   let output = filter(input, isEven);
   assert(output,  [1, 2, 3, 4, 5], [2, 4], "this is `output` & evens passed");
 });;
 exports["test filter reg once"] = $.registerOnce(function(input, assert) {
   assert(filter(input, isEven),  [1, 2, 3, 4, 5, 6], [2, 4, 6],
          "listener can be registered only once");
 });
 exports["test filter ignores new"] = $.ignoreNew(function(input, assert) {
   assert(filter(input, isEven), [1, 2, 3], [2],
          "new listener is ignored")
 });
 exports["test filter is FIFO"] = $.FIFO(function(input, assert) {
   assert(filter(input, isEven), [1, 2, 3, 4], [2, 4],
          "listeners are invoked in fifo order")
 });
 exports["test map events"] = function(assert) {
   let input = {};
   let incs = map(input, inc);
   let actual = [];
   on(incs, "data", function(e) actual.push(e));
   [1, 2, 3, 4].forEach(function(x) emit(input, "data", x));
   assert.deepEqual(actual, [2, 3, 4, 5], "all numbers were incremented");
 };
 exports["test map emits"] = $.emits(function(input, assert) {
   let output = map(input, inc);
   assert(output,  [1, 2, 3], [2, 3, 4], "this is `output` & evens passed");
 });;
 exports["test map reg once"] = $.registerOnce(function(input, assert) {
   assert(map(input, inc),  [1, 2, 3], [2, 3, 4],
          "listener can be registered only once");
 });
 exports["test map ignores new"] = $.ignoreNew(function(input, assert) {
   assert(map(input, inc), [1], [2],
          "new listener is ignored")
 });
 exports["test map is FIFO"] = $.FIFO(function(input, assert) {
   assert(map(input, inc), [1, 2, 3, 4], [2, 3, 4, 5],
          "listeners are invoked in fifo order")
 });
 exports["test merge stream[stream]"] = function(assert) {
   let a = {}, b = {}, c = {};
   let inputs = {};
   let actual = [];
   on(merge(inputs), "data", function($) actual.push($))
   emit(inputs, "data", a);
   emit(a, "data", "a1");
   emit(inputs, "data", b);
   emit(b, "data", "b1");
   emit(a, "data", "a2");
   emit(inputs, "data", c);
   emit(c, "data", "c1");
   emit(c, "data", "c2");
   emit(b, "data", "b2");
   emit(a, "data", "a3");
   assert.deepEqual(actual, ["a1", "b1", "a2", "c1", "c2", "b2", "a3"],
                    "all inputs data merged into one");
 };
 exports["test merge array[stream]"] = function(assert) {
   let a = {}, b = {}, c = {};
   let inputs = {};
   let actual = [];
   on(merge([a, b, c]), "data", function($) actual.push($))
   emit(a, "data", "a1");
   emit(b, "data", "b1");
   emit(a, "data", "a2");
   emit(c, "data", "c1");
   emit(c, "data", "c2");
   emit(b, "data", "b2");
   emit(a, "data", "a3");
   assert.deepEqual(actual, ["a1", "b1", "a2", "c1", "c2", "b2", "a3"],
                    "all inputs data merged into one");
 };
 exports["test merge emits"] = $.emits(function(input, assert) {
   let evens = filter(input, isEven)
   let output = merge([evens, input]);
   assert(output, [1, 2, 3], [1, 2, 2, 3], "this is `output` & evens passed");
 });
 exports["test merge reg once"] = $.registerOnce(function(input, assert) {
   let evens = filter(input, isEven)
   let output = merge([input, evens]);
   assert(output,  [1, 2, 3, 4], [1, 2, 2, 3, 4, 4],
          "listener can be registered only once");
 });
 exports["test merge ignores new"] = $.ignoreNew(function(input, assert) {
   let evens = filter(input, isEven)
   let output = merge([input, evens])
   assert(output, [1], [1],
          "new listener is ignored")
 });
 exports["test marge is FIFO"] = $.FIFO(function(input, assert) {
   let evens = filter(input, isEven)
   let output = merge([input, evens])
   assert(output, [1, 2, 3, 4], [1, 2, 2, 3, 4, 4],
          "listeners are invoked in fifo order")
 });
 exports["test expand"] = function(assert) {
   let a = {}, b = {}, c = {};
   let inputs = {};
   let actual = [];
   on(expand(inputs, function($) $()), "data", function($) actual.push($))
   emit(inputs, "data", function() a);
   emit(a, "data", "a1");
   emit(inputs, "data", function() b);
   emit(b, "data", "b1");
   emit(a, "data", "a2");
   emit(inputs, "data", function() c);
   emit(c, "data", "c1");
   emit(c, "data", "c2");
   emit(b, "data", "b2");
   emit(a, "data", "a3");
   assert.deepEqual(actual, ["a1", "b1", "a2", "c1", "c2", "b2", "a3"],
                    "all inputs data merged into one");
 };
 exports["test pipe"] = function (assert, done) {
   let src = {};
   let dest = {};
   let aneventCount = 0, multiargsCount = 0;
   let wildcardCount = {};
   on(dest, 'an-event', arg => {
     assert.equal(arg, 'my-arg', 'piped argument to event');
     ++aneventCount;
     check();
   });
   on(dest, 'multiargs', (...data) => {
     assert.equal(data[0], 'a', 'multiple arguments passed via pipe');
     assert.equal(data[1], 'b', 'multiple arguments passed via pipe');
     assert.equal(data[2], 'c', 'multiple arguments passed via pipe');
     ++multiargsCount;
     check();
   });
   on(dest, '*', (name, ...data) => {
     wildcardCount[name] = (wildcardCount[name] || 0) + 1;
     if (name === 'multiargs') {
       assert.equal(data[0], 'a', 'multiple arguments passed via pipe, wildcard');
       assert.equal(data[1], 'b', 'multiple arguments passed via pipe, wildcard');
       assert.equal(data[2], 'c', 'multiple arguments passed via pipe, wildcard');
     }
     if (name === 'an-event')
       assert.equal(data[0], 'my-arg', 'argument passed via pipe, wildcard');
     check();
   });
   pipe(src, dest);
   for (let i = 0; i < 3; i++)
     emit(src, 'an-event', 'my-arg');
   emit(src, 'multiargs', 'a', 'b', 'c');
   function check () {
     if (aneventCount === 3 && multiargsCount === 1 &&
         wildcardCount['an-event'] === 3 &&
         wildcardCount['multiargs'] === 1)
       done();
   }
 };
 exports["test pipe multiple targets"] = function (assert) {
   let src1 = {};
   let src2 = {};
   let middle = {};
   let dest = {};
   pipe(src1, middle);
   pipe(src2, middle);
   pipe(middle, dest);
   let middleFired = 0;
   let destFired = 0;
   let src1Fired = 0;
   let src2Fired = 0;
   on(src1, '*', () => src1Fired++);
   on(src2, '*', () => src2Fired++);
   on(middle, '*', () => middleFired++);
   on(dest, '*', () => destFired++);
   emit(src1, 'ev');
   assert.equal(src1Fired, 1, 'event triggers in source in pipe chain');
   assert.equal(middleFired, 1, 'event passes through the middle of pipe chain');
   assert.equal(destFired, 1, 'event propagates to end of pipe chain');
   assert.equal(src2Fired, 0, 'event does not fire on alternative chain routes');
   emit(src2, 'ev');
   assert.equal(src2Fired, 1, 'event triggers in source in pipe chain');
   assert.equal(middleFired, 2,
     'event passes through the middle of pipe chain from different src');
   assert.equal(destFired, 2,
     'event propagates to end of pipe chain from different src');
   assert.equal(src1Fired, 1, 'event does not fire on alternative chain routes');
   emit(middle, 'ev');
   assert.equal(middleFired, 3,
     'event triggers in source of pipe chain');
   assert.equal(destFired, 3,
     'event propagates to end of pipe chain from middle src');
   assert.equal(src1Fired, 1, 'event does not fire on alternative chain routes');
   assert.equal(src2Fired, 1, 'event does not fire on alternative chain routes');
 };
 exports['test stripListeners'] = function (assert) {
   var options = {
     onAnEvent: noop1,
     onMessage: noop2,
     verb: noop1,
     value: 100
   };
   var stripped = stripListeners(options);
   assert.ok(stripped !== options, 'stripListeners should return a new object');
   assert.equal(options.onAnEvent, noop1, 'stripListeners does not affect original');
   assert.equal(options.onMessage, noop2, 'stripListeners does not affect original');
   assert.equal(options.verb, noop1, 'stripListeners does not affect original');
   assert.equal(options.value, 100, 'stripListeners does not affect original');
   assert.ok(!stripped.onAnEvent, 'stripListeners removes `on*` values');
   assert.ok(!stripped.onMessage, 'stripListeners removes `on*` values');
   assert.equal(stripped.verb, noop1, 'stripListeners leaves not `on*` values');
   assert.equal(stripped.value, 100, 'stripListeners leaves not `on*` values');
   function noop1 () {}
   function noop2 () {}
 };
 require('test').run(exports);