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

comparison: addon-sdk/source/test/test-functional.js

addon-sdk/source/test/test-functional.js

branch: TOR_BUG_9701
changeset 15: b8a032363ba2

equal deleted inserted replaced

--1:000000000000
+:90c6a33229e2
+/* 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 { setTimeout } = require('sdk/timers');
+const utils = require('sdk/lang/functional');
+const { invoke, defer, partial, compose, memoize, once, is, isnt,
+delay, wrap, curry, chainable, field, query, isInstance, debounce, throttle
+} = utils;
+const { LoaderWithHookedConsole } = require('sdk/test/loader');
+exports['test forwardApply'] = function(assert) {
+function sum(b, c) { return this.a + b + c; }
+assert.equal(invoke(sum, [2, 3], { a: 1 }), 6,
+'passed arguments and pseoude-variable are used');
+assert.equal(invoke(sum.bind({ a: 2 }), [2, 3], { a: 1 }), 7,
+'bounded `this` pseoudo variable is used');
+};
+exports['test deferred function'] = function(assert, done) {
+let nextTurn = false;
+function sum(b, c) {
+assert.ok(nextTurn, 'enqueued is called in next turn of event loop');
+assert.equal(this.a + b + c, 6,
+'passed arguments an pseoude-variable are used');
+done();
+}
+let fixture = { a: 1, method: defer(sum) };
+fixture.method(2, 3);
+nextTurn = true;
+};
+exports['test partial function'] = function(assert) {
+function sum(b, c) { return this.a + b + c; }
+let foo = { a : 5 };
+foo.sum7 = partial(sum, 7);
+foo.sum8and4 = partial(sum, 8, 4);
+assert.equal(foo.sum7(2), 14, 'partial one arguments works');
+assert.equal(foo.sum8and4(), 17, 'partial both arguments works');
+};
+exports["test curry defined numeber of arguments"] = function(assert) {
+var sum = curry(function(a, b, c) {
+return a + b + c;
+});
+assert.equal(sum(2, 2, 1), 5, "sum(2, 2, 1) => 5");
+assert.equal(sum(2, 4)(1), 7, "sum(2, 4)(1) => 7");
+assert.equal(sum(2)(4, 2), 8, "sum(2)(4, 2) => 8");
+assert.equal(sum(2)(4)(3), 9, "sum(2)(4)(3) => 9");
+};
+exports['test compose'] = function(assert) {
+let greet = function(name) { return 'hi: ' + name; };
+let exclaim = function(sentence) { return sentence + '!'; };
+assert.equal(compose(exclaim, greet)('moe'), 'hi: moe!',
+'can compose a function that takes another');
+assert.equal(compose(greet, exclaim)('moe'), 'hi: moe!',
+'in this case, the functions are also commutative');
+let target = {
+name: 'Joe',
+greet: compose(function exclaim(sentence) {
+return sentence + '!';
+}, function(title) {
+return 'hi : ' + title + ' ' + this.name;
+})
+};
+assert.equal(target.greet('Mr'), 'hi : Mr Joe!',
+'this can be passed in');
+assert.equal(target.greet.call({ name: 'Alex' }, 'Dr'), 'hi : Dr Alex!',
+'this can be applied');
+let single = compose(function(value) {
+return value + ':suffix';
+});
+assert.equal(single('text'), 'text:suffix', 'works with single function');
+let identity = compose();
+assert.equal(identity('bla'), 'bla', 'works with zero functions');
+};
+exports['test wrap'] = function(assert) {
+let greet = function(name) { return 'hi: ' + name; };
+let backwards = wrap(greet, function(f, name) {
+return f(name) + ' ' + name.split('').reverse().join('');
+});
+assert.equal(backwards('moe'), 'hi: moe eom',
+'wrapped the saluation function');
+let inner = function () { return 'Hello '; };
+let target = {
+name: 'Matteo',
+hi: wrap(inner, function(f) { return f() + this.name; })
+};
+assert.equal(target.hi(), 'Hello Matteo', 'works with this');
+function noop() { }
+let wrapped = wrap(noop, function(f) {
+return Array.slice(arguments);
+});
+let actual = wrapped([ 'whats', 'your' ], 'vector', 'victor');
+assert.deepEqual(actual, [ noop, ['whats', 'your'], 'vector', 'victor' ],
+'works with fancy stuff');
+};
+exports['test memoize'] = function(assert) {
+const fib = n => n < 2 ? n : fib(n - 1) + fib(n - 2);
+let fibnitro = memoize(fib);
+assert.equal(fib(10), 55,
+'a memoized version of fibonacci produces identical results');
+assert.equal(fibnitro(10), 55,
+'a memoized version of fibonacci produces identical results');
+function o(key, value) { return value; }
+let oo = memoize(o), v1 = {}, v2 = {};
+assert.equal(oo(1, v1), v1, 'returns value back');
+assert.equal(oo(1, v2), v1, 'memoized by a first argument');
+assert.equal(oo(2, v2), v2, 'returns back value if not memoized');
+assert.equal(oo(2), v2, 'memoized new value');
+assert.notEqual(oo(1), oo(2), 'values do not override');
+assert.equal(o(3, v2), oo(2, 3), 'returns same value as un-memoized');
+let get = memoize(function(attribute) { return this[attribute]; });
+let target = { name: 'Bob', get: get };
+assert.equal(target.get('name'), 'Bob', 'has correct `this`');
+assert.equal(target.get.call({ name: 'Jack' }, 'name'), 'Bob',
+'name is memoized');
+assert.equal(get('name'), 'Bob', 'once memoized can be called without this');
+};
+exports['test delay'] = function(assert, done) {
+let delayed = false;
+delay(function() {
+assert.ok(delayed, 'delayed the function');
+done();
+}, 1);
+delayed = true;
+};
+exports['test delay with this'] = function(assert, done) {
+let context = {};
+delay.call(context, function(name) {
+assert.equal(this, context, 'this was passed in');
+assert.equal(name, 'Tom', 'argument was passed in');
+done();
+}, 10, 'Tom');
+};
+exports['test once'] = function(assert) {
+let n = 0;
+let increment = once(function() { n ++; });
+increment();
+increment();
+assert.equal(n, 1, 'only incremented once');
+let target = {
+state: 0,
+update: once(function() {
+return this.state ++;
+})
+};
+target.update();
+target.update();
+assert.equal(target.state, 1, 'this was passed in and called only once');
+};
+exports['test once with argument'] = function(assert) {
+let n = 0;
+let increment = once(a => n++);
+increment();
+increment('foo');
+assert.equal(n, 1, 'only incremented once');
+increment();
+increment('foo');
+assert.equal(n, 1, 'only incremented once');
+};
+exports['test complement'] = assert => {
+let { complement } = require("sdk/lang/functional");
+let isOdd = x => Boolean(x % 2);
+assert.equal(isOdd(1), true);
+assert.equal(isOdd(2), false);
+let isEven = complement(isOdd);
+assert.equal(isEven(1), false);
+assert.equal(isEven(2), true);
+let foo = {};
+let isFoo = function() { return this === foo; };
+let insntFoo = complement(isFoo);
+assert.equal(insntFoo.call(foo), false);
+assert.equal(insntFoo.call({}), true);
+};
+exports['test constant'] = assert => {
+let { constant } = require("sdk/lang/functional");
+let one = constant(1);
+assert.equal(one(1), 1);
+assert.equal(one(2), 1);
+};
+exports['test apply'] = assert => {
+let { apply } = require("sdk/lang/functional");
+let dashify = (...args) => args.join("-");
+assert.equal(apply(dashify, 1, [2, 3]), "1-2-3");
+assert.equal(apply(dashify, "a"), "a");
+assert.equal(apply(dashify, ["a", "b"]), "a-b");
+assert.equal(apply(dashify, ["a", "b"], "c"), "a,b-c");
+assert.equal(apply(dashify, [1, 2], [3, 4]), "1,2-3-4");
+};
+exports['test flip'] = assert => {
+let { flip } = require("sdk/lang/functional");
+let append = (left, right) => left + " " + right;
+let prepend = flip(append);
+assert.equal(append("hello", "world"), "hello world");
+assert.equal(prepend("hello", "world"), "world hello");
+let wrap = function(left, right) {
+return left + " " + this + " " + right;
+};
+let invertWrap = flip(wrap);
+assert.equal(wrap.call("@", "hello", "world"), "hello @ world");
+assert.equal(invertWrap.call("@", "hello", "world"), "world @ hello");
+let reverse = flip((...args) => args);
+assert.deepEqual(reverse(1, 2, 3, 4), [4, 3, 2, 1]);
+assert.deepEqual(reverse(1), [1]);
+assert.deepEqual(reverse(), []);
+// currying still works
+let prependr = curry(prepend);
+assert.equal(prependr("hello", "world"), "world hello");
+assert.equal(prependr("hello")("world"), "world hello");
+};
+exports["test when"] = assert => {
+let { when } = require("sdk/lang/functional");
+let areNums = (...xs) => xs.every(x => typeof(x) === "number");
+let sum = when(areNums, (...xs) => xs.reduce((y, x) => x + y, 0));
+assert.equal(sum(1, 2, 3), 6);
+assert.equal(sum(1, 2, "3"), undefined);
+let multiply = when(areNums,
+(...xs) => xs.reduce((y, x) => x * y, 1),
+(...xs) => xs);
+assert.equal(multiply(2), 2);
+assert.equal(multiply(2, 3), 6);
+assert.deepEqual(multiply(2, "4"), [2, "4"]);
+function Point(x, y) {
+this.x = x;
+this.y = y;
+}
+let isPoint = x => x instanceof Point;
+let inc = when(isPoint, ({x, y}) => new Point(x + 1, y + 1));
+assert.equal(inc({}), undefined);
+assert.deepEqual(inc(new Point(0, 0)), { x: 1, y: 1 });
+let axis = when(isPoint,
+({ x, y }) => [x, y],
+_ => [0, 0]);
+assert.deepEqual(axis(new Point(1, 4)), [1, 4]);
+assert.deepEqual(axis({ foo: "bar" }), [0, 0]);
+};
+exports["test chainable"] = function(assert) {
+let Player = function () { this.volume = 5; };
+Player.prototype = {
+setBand: chainable(function (band) { return (this.band = band); }),
+incVolume: chainable(function () { return this.volume++; })
+};
+let player = new Player();
+player
+.setBand('Animals As Leaders')
+.incVolume().incVolume().incVolume().incVolume().incVolume().incVolume();
+assert.equal(player.band, 'Animals As Leaders', 'passes arguments into chained');
+assert.equal(player.volume, 11, 'accepts no arguments in chain');
+};
+exports["test field"] = assert => {
+let Num = field("constructor", 0);
+assert.equal(Num.name, Number.name);
+assert.ok(typeof(Num), "function");
+let x = field("x");
+[
+[field("foo", { foo: 1 }), 1],
+[field("foo")({ foo: 1 }), 1],
+[field("bar", {}), undefined],
+[field("bar")({}), undefined],
+[field("hey", undefined), undefined],
+[field("hey")(undefined), undefined],
+[field("how", null), null],
+[field("how")(null), null],
+[x(1), undefined],
+[x(undefined), undefined],
+[x(null), null],
+[x({ x: 1 }), 1],
+[x({ x: 2 }), 2],
+].forEach(([actual, expected]) => assert.equal(actual, expected));
+};
+exports["test query"] = assert => {
+let Num = query("constructor", 0);
+assert.equal(Num.name, Number.name);
+assert.ok(typeof(Num), "function");
+let x = query("x");
+let xy = query("x.y");
+[
+[query("foo", { foo: 1 }), 1],
+[query("foo")({ foo: 1 }), 1],
+[query("foo.bar", { foo: { bar: 2 } }), 2],
+[query("foo.bar")({ foo: { bar: 2 } }), 2],
+[query("foo.bar", { foo: 1 }), undefined],
+[query("foo.bar")({ foo: 1 }), undefined],
+[x(1), undefined],
+[x(undefined), undefined],
+[x(null), null],
+[x({ x: 1 }), 1],
+[x({ x: 2 }), 2],
+[xy(1), undefined],
+[xy(undefined), undefined],
+[xy(null), null],
+[xy({ x: 1 }), undefined],
+[xy({ x: 2 }), undefined],
+[xy({ x: { y: 1 } }), 1],
+[xy({ x: { y: 2 } }), 2]
+].forEach(([actual, expected]) => assert.equal(actual, expected));
+};
+exports["test isInstance"] = assert => {
+function X() {}
+function Y() {}
+let isX = isInstance(X);
+[
+isInstance(X, new X()),
+isInstance(X)(new X()),
+!isInstance(X, new Y()),
+!isInstance(X)(new Y()),
+isX(new X()),
+!isX(new Y())
+].forEach(x => assert.ok(x));
+};
+exports["test is"] = assert => {
+assert.deepEqual([ 1, 0, 1, 0, 1 ].map(is(1)),
+[ true, false, true, false, true ],
+"is can be partially applied");
+assert.ok(is(1, 1));
+assert.ok(!is({}, {}));
+assert.ok(is()(1)()(1), "is is curried");
+assert.ok(!is()(1)()(2));
+};
+exports["test isnt"] = assert => {
+assert.deepEqual([ 1, 0, 1, 0, 1 ].map(isnt(0)),
+[ true, false, true, false, true ],
+"is can be partially applied");
+assert.ok(!isnt(1, 1));
+assert.ok(isnt({}, {}));
+assert.ok(!isnt()(1)()(1));
+assert.ok(isnt()(1)()(2));
+};
+exports["test debounce"] = (assert, done) => {
+let counter = 0;
+let fn = debounce(() => counter++, 100);
+new Array(10).join(0).split("").forEach(fn);
+assert.equal(counter, 0, "debounce does not fire immediately");
+setTimeout(() => {
+assert.equal(counter, 1, "function called after wait time");
+fn();
+setTimeout(() => {
+assert.equal(counter, 2, "function able to be called again after wait");
+done();
+}, 150);
+}, 200);
+};
+exports["test throttle"] = (assert, done) => {
+let called = 0;
+let attempt = 0;
+let atleast100ms = false;
+let throttledFn = throttle(() => {
+called++;
+if (called === 2) {
+assert.equal(attempt, 10, "called twice, but attempted 10 times");
+fn();
+}
+if (called === 3) {
+assert.ok(atleast100ms, "atleast 100ms have passed");
+assert.equal(attempt, 11, "called third, waits for delay to happen");
+done();
+}
+}, 200);
+let fn = () => ++attempt && throttledFn();
+setTimeout(() => atleast100ms = true, 100);
+new Array(11).join(0).split("").forEach(fn);
+};
+require('test').run(exports);