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-/* 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('sdk/test').run(exports);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-24 05:40:02 +0000