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Convert package to standard JS modules #318

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merged 4 commits into from
Apr 3, 2022
Merged

Convert package to standard JS modules #318

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61e0fc7
Update jest
justinfagnani Mar 22, 2022
91fcd24
Update prettier
justinfagnani Mar 22, 2022
7e5bd48
Convert chess.js to a standard JS module
justinfagnani Mar 22, 2022
8249063
Move constants and utilies to top level of module.
justinfagnani Mar 22, 2022
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3 changes: 2 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,8 @@ yarn add chess.js
The code below plays a random game of chess:

```js
const { Chess } = require('./chess.js')
import { Chess } = from 'chess.js';

const chess = new Chess()

while (!chess.game_over()) {
Expand Down
58 changes: 28 additions & 30 deletions __tests__/chess.test.js
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@@ -1,6 +1,4 @@
if (typeof require != 'undefined') {
var Chess = require('../chess').Chess
}
import { Chess, WHITE, BLACK, PAWN, KNIGHT, BISHOP, ROOK, KING, QUEEN, SQUARES } from '../chess.js'

describe('Perft', () => {
const perfts = [
Expand Down Expand Up @@ -297,58 +295,58 @@ describe('Get/Put/Remove', () => {
const positions = [
{
pieces: {
a7: { type: chess.PAWN, color: chess.WHITE },
b7: { type: chess.PAWN, color: chess.BLACK },
c7: { type: chess.KNIGHT, color: chess.WHITE },
d7: { type: chess.KNIGHT, color: chess.BLACK },
e7: { type: chess.BISHOP, color: chess.WHITE },
f7: { type: chess.BISHOP, color: chess.BLACK },
g7: { type: chess.ROOK, color: chess.WHITE },
h7: { type: chess.ROOK, color: chess.BLACK },
a6: { type: chess.QUEEN, color: chess.WHITE },
b6: { type: chess.QUEEN, color: chess.BLACK },
a4: { type: chess.KING, color: chess.WHITE },
h4: { type: chess.KING, color: chess.BLACK },
a7: { type: PAWN, color: WHITE },
b7: { type: PAWN, color: BLACK },
c7: { type: KNIGHT, color: WHITE },
d7: { type: KNIGHT, color: BLACK },
e7: { type: BISHOP, color: WHITE },
f7: { type: BISHOP, color: BLACK },
g7: { type: ROOK, color: WHITE },
h7: { type: ROOK, color: BLACK },
a6: { type: QUEEN, color: WHITE },
b6: { type: QUEEN, color: BLACK },
a4: { type: KING, color: WHITE },
h4: { type: KING, color: BLACK },
},
should_pass: true,
},

{
pieces: { a7: { type: 'z', color: chess.WHTIE } }, // bad piece
pieces: { a7: { type: 'z', color: WHITE } }, // bad piece
should_pass: false,
},

{
pieces: { j4: { type: chess.PAWN, color: chess.WHTIE } }, // bad square
pieces: { j4: { type: PAWN, color: WHITE } }, // bad square
should_pass: false,
},

/* disallow two kings (black) */
{
pieces: {
a7: { type: chess.KING, color: chess.BLACK },
h2: { type: chess.KING, color: chess.WHITE },
a8: { type: chess.KING, color: chess.BLACK },
a7: { type: KING, color: BLACK },
h2: { type: KING, color: WHITE },
a8: { type: KING, color: BLACK },
},
should_pass: false,
},

/* disallow two kings (white) */
{
pieces: {
a7: { type: chess.KING, color: chess.BLACK },
h2: { type: chess.KING, color: chess.WHITE },
h1: { type: chess.KING, color: chess.WHITE },
a7: { type: KING, color: BLACK },
h2: { type: KING, color: WHITE },
h1: { type: KING, color: WHITE },
},
should_pass: false,
},

/* allow two kings if overwriting the exact same square */
{
pieces: {
a7: { type: chess.KING, color: chess.BLACK },
h2: { type: chess.KING, color: chess.WHITE },
h2: { type: chess.KING, color: chess.WHITE },
a7: { type: KING, color: BLACK },
h2: { type: KING, color: WHITE },
h2: { type: KING, color: WHITE },
},
should_pass: true,
},
Expand All @@ -367,8 +365,8 @@ describe('Get/Put/Remove', () => {
/* iterate over every square to make sure get returns the proper
* piece values/color
*/
for (let j = 0; j < chess.SQUARES.length; j++) {
const square = chess.SQUARES[j]
for (let j = 0; j < SQUARES.length; j++) {
const square = SQUARES[j]
if (!(square in position.pieces)) {
if (chess.get(square)) {
passed = false
Expand All @@ -391,8 +389,8 @@ describe('Get/Put/Remove', () => {

if (passed) {
/* remove the pieces */
for (let j = 0; j < chess.SQUARES.length; j++) {
const square = chess.SQUARES[j]
for (let j = 0; j < SQUARES.length; j++) {
const square = SQUARES[j]
const piece = chess.remove(square)
if (!(square in position.pieces) && piece) {
passed = false
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