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Node.js 节点单元测试获胜'；不要等待应用程序加载

node.js unit-testing

Node.js 节点单元测试获胜'；不要等待应用程序加载,node.js,unit-testing,async-await,aws-secrets-manager,Node.js,Unit Testing,Async Await,Aws Secrets Manager,我决定在服务器开始侦听之前，通过AWS Secrets Manager加载节点服务器的配置json server.js const express = require('express'); const app = express(); const config = require('./helpers/config'); config.init(function(config){ app.config = config; app.set('port', process.env

我决定在服务器开始侦听之前，通过AWS Secrets Manager加载节点服务器的配置json

server.js

const express = require('express');
const app = express();
const config = require('./helpers/config');

config.init(function(config){
    app.config = config;
    app.set('port', process.env.PORT || 3000);
    app.set('view engine', 'ejs');
    ....
    
    app.listen(app.get('port'), () => {
        console.log('express initialized :)');
    });
});
module.exports = app;

var aws = require('aws-sdk');
var secretName = "bla";

class Config {

    static init(done) {
        let client = new aws.SecretsManager({
            secretAccessKey: process.env.SECRET_ACCESS_KEY,
            accessKeyId: process.env.ACCESS_ID,
            region: process.env.REGION
        });
        client.getSecretValue({SecretId: secretName}, function(err, data) {
            if (err) {
                throw err;
            } else {
                let res = JSON.parse(data.SecretString);
                Config.config = res;
                done(res);
            }
        });
    }
}
module.exports = Config;

class Tester {
    static async getApp(){
        if(Tester.app){
            return Tester.app;
        }
        Tester.app = await require('./../server');
        // adding sleep here solves the problem... why doesn't the await works?!
        return Tester.app
    }
    ....
}

describe('API Tests :: User', function() { 

    before((done) => {
        Tester.getApp().then((app1) => {
            done();
        });
    });

    describe('# register ', function() { 
        it('should fail for missing email', function(done) { 
            request('http://127.0.0.1:9763').post('/api/v1/users').end(function(err, res) { 
                expect(res.statusCode).to.equal(422); 
                expect(res.body).to.have.property('errors');
                done(); 
            }); 
        });
    });
});
helpers/config.js

const express = require('express');
const app = express();
const config = require('./helpers/config');

config.init(function(config){
    app.config = config;
    app.set('port', process.env.PORT || 3000);
    app.set('view engine', 'ejs');
    ....
    
    app.listen(app.get('port'), () => {
        console.log('express initialized :)');
    });
});
module.exports = app;

var aws = require('aws-sdk');
var secretName = "bla";

class Config {

    static init(done) {
        let client = new aws.SecretsManager({
            secretAccessKey: process.env.SECRET_ACCESS_KEY,
            accessKeyId: process.env.ACCESS_ID,
            region: process.env.REGION
        });
        client.getSecretValue({SecretId: secretName}, function(err, data) {
            if (err) {
                throw err;
            } else {
                let res = JSON.parse(data.SecretString);
                Config.config = res;
                done(res);
            }
        });
    }
}
module.exports = Config;

class Tester {
    static async getApp(){
        if(Tester.app){
            return Tester.app;
        }
        Tester.app = await require('./../server');
        // adding sleep here solves the problem... why doesn't the await works?!
        return Tester.app
    }
    ....
}

describe('API Tests :: User', function() { 

    before((done) => {
        Tester.getApp().then((app1) => {
            done();
        });
    });

    describe('# register ', function() { 
        it('should fail for missing email', function(done) { 
            request('http://127.0.0.1:9763').post('/api/v1/users').end(function(err, res) { 
                expect(res.statusCode).to.equal(422); 
                expect(res.body).to.have.property('errors');
                done(); 
            }); 
        });
    });
});
这似乎很有效。然而，它破坏了我基于摩卡的单元测试

我更新了我的单元测试，以包括一个单例，该单例应该在耐心等待配置加载后加载一次应用程序

helpers/tester.js

const express = require('express');
const app = express();
const config = require('./helpers/config');

config.init(function(config){
    app.config = config;
    app.set('port', process.env.PORT || 3000);
    app.set('view engine', 'ejs');
    ....
    
    app.listen(app.get('port'), () => {
        console.log('express initialized :)');
    });
});
module.exports = app;

var aws = require('aws-sdk');
var secretName = "bla";

class Config {

    static init(done) {
        let client = new aws.SecretsManager({
            secretAccessKey: process.env.SECRET_ACCESS_KEY,
            accessKeyId: process.env.ACCESS_ID,
            region: process.env.REGION
        });
        client.getSecretValue({SecretId: secretName}, function(err, data) {
            if (err) {
                throw err;
            } else {
                let res = JSON.parse(data.SecretString);
                Config.config = res;
                done(res);
            }
        });
    }
}
module.exports = Config;

class Tester {
    static async getApp(){
        if(Tester.app){
            return Tester.app;
        }
        Tester.app = await require('./../server');
        // adding sleep here solves the problem... why doesn't the await works?!
        return Tester.app
    }
    ....
}

describe('API Tests :: User', function() { 

    before((done) => {
        Tester.getApp().then((app1) => {
            done();
        });
    });

    describe('# register ', function() { 
        it('should fail for missing email', function(done) { 
            request('http://127.0.0.1:9763').post('/api/v1/users').end(function(err, res) { 
                expect(res.statusCode).to.equal(422); 
                expect(res.body).to.have.property('errors');
                done(); 
            }); 
        });
    });
});
test/users.test.js

const express = require('express');
const app = express();
const config = require('./helpers/config');

config.init(function(config){
    app.config = config;
    app.set('port', process.env.PORT || 3000);
    app.set('view engine', 'ejs');
    ....
    
    app.listen(app.get('port'), () => {
        console.log('express initialized :)');
    });
});
module.exports = app;

var aws = require('aws-sdk');
var secretName = "bla";

class Config {

    static init(done) {
        let client = new aws.SecretsManager({
            secretAccessKey: process.env.SECRET_ACCESS_KEY,
            accessKeyId: process.env.ACCESS_ID,
            region: process.env.REGION
        });
        client.getSecretValue({SecretId: secretName}, function(err, data) {
            if (err) {
                throw err;
            } else {
                let res = JSON.parse(data.SecretString);
                Config.config = res;
                done(res);
            }
        });
    }
}
module.exports = Config;

class Tester {
    static async getApp(){
        if(Tester.app){
            return Tester.app;
        }
        Tester.app = await require('./../server');
        // adding sleep here solves the problem... why doesn't the await works?!
        return Tester.app
    }
    ....
}

describe('API Tests :: User', function() { 

    before((done) => {
        Tester.getApp().then((app1) => {
            done();
        });
    });

    describe('# register ', function() { 
        it('should fail for missing email', function(done) { 
            request('http://127.0.0.1:9763').post('/api/v1/users').end(function(err, res) { 
                expect(res.statusCode).to.equal(422); 
                expect(res.body).to.have.property('errors');
                done(); 
            }); 
        });
    });
});
这似乎不像预期的那样有效。单元测试执行得很快，在配置有机会加载之前就失败了。如果我在singleton中添加一个sleep函数，那么一切都正常