Question

由于Node.js为所需模块创建了一个全局单例，我如何在每个测试中创建下面的游戏的唯一实例？我想确保每次开始游戏时都会从一个新的游戏对象开始，该对象将初始化初始化为假。

现在game.start，游戏是每个测试中使用的相同的单身人士，我不希望这样，我不应该通过每次测试分享那个单身人士，这显然很糟糕。

let chai = require('chai'),
    should = chai.should(),
    game = require('../src/game');

describe('Starting the Game', () => {

    it('should be able to start the game', () => {
        game.start();

        game.started.should.be.true;
    });

    it('should contain a new board to play on when game starts', () => {
        game.start();

        game.started.should.be.true;
        should.exist(game.board);
    });
});

game.js

var board = require('./board'),
    player = require('./player');

var game = module.exports = {
    start: start,
    started: false,
    board: board.create()
};

function start(){
    game.started = true;
};

Answer 1

如果您需要在每个测试中实例化一个新实例，那么您需要将game和board定义为一个类。

然后，您可以在beforeEach方法中实例化新的游戏实例，并在每个测试用例之前执行。

<强> Game.js

var Board = require('./board'),
    Player = require('./player');

class Game {
    constructor() {
        this.started = false;
        this.board = new Board();
    }
    start() {
        this.started = true;
    }
}

export default Game;

<强>游戏单元-test.js

const chai = require('chai'),
    should = chai.should(),
    Game = require('../../test');

let game;

describe.only('Starting the Game', () => {
    beforeEach((done) => {
        game = new Game();
        done();
    });

    it('should be able to start the game', () => {
        game.start();

        game.started.should.be.true;
    });

    it('should contain a new board to play on when game starts', () => {
        game.start();

        game.started.should.be.true;
        should.exist(game.board);
    });
});

在每个测试

1 个答案: