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node.js - 测试 : node. js/Mocha 时出现异常行为

转载 作者:行者123 更新时间:2023-11-28 20:08:12 29 4
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我最近开始使用 nodeJS 并开始使用 Express & Wagnor 构建一个中间件应用程序

下面是我的package.JSON

{
"devDependencies": {
"gulp": "3.8.11",
"gulp-mocha": "2.0.1",
"mocha": "2.2.4",
"superagent": "1.2.0",
"wagner-core": "0.1.0"
},
"dependencies": {
"underscore": "1.5.2",
"mongodb": "2.2.10",
"express": "",
"http-status": "0.1.8",
"mongoose":""
},
"scripts": {
"test": "mocha test.js"
}
}

我陷入了一种非常特殊的情况,并搜索了类似的事件报告,但找不到任何相关的信息。我确信我犯了一个愚蠢的错误,需要帮助来识别它。

场景如下,我有一个带有 6 个端点的基本中间件设置,我正在使用 mocha 进行测试。

我有一个包含 6 个测试的 test.js 文件,问题是当我运行它时,它通过一次并再次失败,然后再次通过而没有对环境或代码或测试进行任何干预。这让我非常担心我的应用程序在生产中的行为是否相似,或者这是一个测试相关的问题或一个已知的 mocha 问题(找不到任何问题)。

下面是我的测试文件

var URL_ROOT = 'http://localhost:3131';
var express = require('express');
var wagner = require('wagner-core');
var assert = require('assert');
var superagent = require('superagent');
var mongoose = require('mongoose');
//mongoose.set('debug', true);

var PRODUCT_ID = '0000000000000000000001';

describe('Store API', function(){
var server;
var Product;
var Catagory;
var User;


before(function() {
var app = express();

// Bootstrap sertver
models = require('./models')(wagner);
require('./dependencies')(wagner);
app.use(require('./api')(wagner));
wagner.invoke(require('./auth'), {app: app});
server = app.listen(3131);

//Make Catagory and Product model available in test
Catagory = models.Catagory;
Product = models.Product;
User = models.User;


app.use( function(req, res, next) {
User.findOne({}, function(error, user) {
console.log('Time:', Date.now());
assert.ifError(error);
req.user = user;
next();
}); //user.findone
}); //app.use
}); //before

after(function(){
//Shut the server
server.close();
}); //after

beforeEach(function(done) {
//Make sure Catagories are empty before each test
Catagory.remove({}, function(error) {
assert.ifError(error);
Product.remove({}, function(error) {
assert.ifError(error);
User.remove({}, function(error) {
assert.ifError(error);
//Create Products, Catagories and Users
var catagories = [
{ _id: 'Electronics'},
{ _id: 'Phones', parent: 'Electronics'},
{ _id: 'Laptop', parent: 'Electronics'},
{ _id: 'Meat'}
];

// create product data
var products = [
{
_id: '00000000000001',
name: 'LG G4',
catagory: { _id: 'Phones', ancestors: ['Electronics', 'Phones']},
price: {
amount: 300,
currency: 'USD'
}
},
{
_id: '00000000000002',
name: 'Asus Zenbook Prime',
catagory: { _id: 'Laptop', ancestors: ['Electronics', 'Laptop']},
price: {
amount: 2000,
currency: 'USD'
}
},
{
_id: '00000000000003',
name: 'MeatOne Goasht Wala',
catagory: {_id: 'Meat', ancestors: ['Meat']},
price: {
amount: 20,
currency: 'USD'
}
}
];

var users = [{
profile: {
username: 'shoaibhb',
picture: 'http://pbs.twimg.com/profile_images/364903575/ShoaibHayat_Butt.jpg'
},
data: {
oauth: 'invalid',
cart: []
}
}];

Catagory.create( catagories, function(error) {
assert.ifError(error)
Product.create(products, function(error) {
assert.ifError(error)
User.create(users, function(error) {
assert.ifError(error);
User.findOne({}, function(err, user) {

});
});
});
});
});
done();
});
});
});

it('can load a Catagory by id', function(done) {
// Create a single Catagory
// Catagory.create({ _id: 'Electronics' }, function(error, doc) {
// assert.ifError(error);
var url = URL_ROOT + '/catagory/id/Electronics';
//Make and HTTP request to localhost:3131/catagory/id/Electronics
superagent.get(url, function(error, res) {
assert.ifError(error);
var result;
// and make sure we got { _id: 'Electronics'} back
assert.doesNotThrow(function() {
result = JSON.parse(res.text);
});
assert.ok(result.catagory);
assert.equal(result.catagory._id, 'Electronics');
done();
});
//});// ends here
});

it('can load all Catagories that have a certain parent', function(done) {

// Create 4 catagories was here earlier, moved to beforeEach()

//Catagory.create(catagories, function(error, catagories) {
var url = URL_ROOT + '/catagory/parent/Electronics';
//make HTTP request to /catagory/parent/Electronics
superagent.get(url, function(error, res) {
assert.ifError(error);
var result;
assert.doesNotThrow(function() {
result = JSON.parse(res.text);
});
assert.equal(result.catagories.length, 2);
// should be in assending order by _id
assert.equal(result.catagories[0]._id, 'Laptop');
assert.equal(result.catagories[1]._id, 'Phones');
done();
});
//});// create cat ends here
});

it('can load a product by id', function(done) {
//Create a single product


var oneProduct = {
name: 'LG G4',
_id: PRODUCT_ID,
catagory: { _id: 'Phones', ancestors: ['Electronics', 'Phones']},
price: {
amount: 300,
currency: 'USD'
}
};

Product.create(oneProduct, function(error, doc) {
assert.ifError( error);
var url = URL_ROOT + '/product/id/' + PRODUCT_ID;
// Make HTTP request to
// localhost:3131/product/id/0000000000000000000001
superagent.get(url, function(error, res) {
assert.ifError(error);
var result = {};
//And make sure we got LG G4 back

assert.doesNotThrow(function() {
result = JSON.parse(res.text);
});

assert.ok(result.product);
assert.equal(result.product._id, PRODUCT_ID);
assert.equal(result.product.name, 'LG G4');
done();
});
});
});

it('can load all products in a Catagory with sub-catagories', function(done) {

// moved to beforeEach function

var url = URL_ROOT + '/product/catagory/Electronics';
//Make HTTP Request to loca:3131
superagent.get(url, function(error, res) {
assert.ifError(error);
var result;
assert.doesNotThrow(function() {
result = JSON.parse(res.text);
});
assert.equal(result.product.length, 2);
// should be assending order by name
assert.equal(result.product[0].name, 'Asus Zenbook Prime');
assert.equal(result.product[1].name, 'LG G4');

//Sort by price , assending
var url = URL_ROOT + '/product/catagory/Electronics?price=1';
superagent.get(url, function(error, res) {
assert.ifError(error);
var result;
assert.doesNotThrow(function() {
result = JSON.parse(res.text);
});
assert.equal(result.product[0].name, 'LG G4');
assert.equal(result.product[1].name, 'Asus Zenbook Prime');
});
//console.log(error);
assert.ifError(error);
done();
});
});


it('can load user cart', function(done) {
var url = URL_ROOT + '/me/';
User.findOne({}, function( error, user) {
console.log("error %j",error);
//assert.ifError(error);
user.data.cart = [{ product: PRODUCT_ID, quantity: 1}];
console.log(user.data.cart);
user.save(function(error) {
assert.ifError(error);
superagent.get(url, function(error, res) {
assert.ifError(error);
assert.equal(res.status, 200);
var result;
assert.doesNotThrow(function() {
result = JSON.parse(res.text).user;
});
assert.equal(result.data.cart.length,1);
assert.equal(result.data.cart[0].product.name, 'Asus Zenbook Prime');
assert.equal(result.data.cart[0].quantity, 1);

});
});
});
done();
});



it('can save user cart', function(done) {
var url = URL_ROOT + '/me/cart/';

superagent.put(url).send({
data: {
cart: [{ product: PRODUCT_ID, quantity: 1}]
}
}).end(function(error, res) {
assert.ifError(error);
assert.equal(res.status, status.OK);
User.findOne({}, function(error, user) {
assert.ifError(error);
assert.equal(user.data.cart.length, 1);
assert.equal(user.data.cart[0].product, PRODUCT_ID);
assert.equal(user.data.cart[0], quantity, 1);
});
});
done();
});
enter code here

});

当我运行这些测试时,会发生以下情况:a) 6 个测试通过b) 一些测试失败c) 出现空白响应

D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js

D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (81ms)
√ can load all Catagories that have a certain parent
√ can load a product by id
√ can load all products in a Catagory with sub-catagories
√ can load user cart
error null
1) "before each" hook


5 passing (752ms)
1 failing

1) Store API "before each" hook:
Uncaught TypeError: Cannot read property 'data' of null
at test-6passing.js:243:17
at node_modules\mongoose\lib\query.js:1173:16
at node_modules\mongoose\node_modules\kareem\index.js:109:16




D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (89ms)
√ can load all Catagories that have a certain parent (38ms)
√ can load a product by id
√ can load all products in a Catagory with sub-catagories
√ can load user cart
error null
1) "before each" hook


5 passing (922ms)
1 failing

1) Store API "before each" hook:
Uncaught TypeError: Cannot read property 'data' of null
at test-6passing.js:243:17
at node_modules\mongoose\lib\query.js:1173:16
at node_modules\mongoose\node_modules\kareem\index.js:109:16




D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (96ms)
√ can load all Catagories that have a certain parent
√ can load a product by id
√ can load all products in a Catagory with sub-catagories
√ can load user cart
error null
√ can save user cart


6 passing (852ms)


D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js

D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (80ms)
√ can load all Catagories that have a certain parent
√ can load a product by id
1) can load all products in a Catagory with sub-catagories
√ can load user cart
error null
2) "before each" hook


4 passing (862ms)
2 failing

1) Store API can load all products in a Catagory with sub-catagories:

Uncaught AssertionError: 0 == 2
+ expected - actual

-0
+2

at test-6passing.js:215:28
at Request.callback (node_modules\superagent\lib\node\index.js:785:12)
at IncomingMessage.<anonymous> (node_modules\superagent\lib\node\index.js:
990:12)
at endReadableNT (_stream_readable.js:913:12)

2) Store API "before each" hook:
Uncaught TypeError: Cannot read property 'data' of null
at test-6passing.js:243:17
at node_modules\mongoose\lib\query.js:1173:16
at node_modules\mongoose\node_modules\kareem\index.js:109:16




D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (86ms)
√ can load all Catagories that have a certain parent (38ms)
√ can load a product by id
√ can load all products in a Catagory with sub-catagories
√ can load user cart
error null
1) "before each" hook


5 passing (744ms)
1 failing

1) Store API "before each" hook:
Uncaught TypeError: Cannot read property 'data' of null
at test-6passing.js:243:17
at node_modules\mongoose\lib\query.js:1173:16
at node_modules\mongoose\node_modules\kareem\index.js:109:16




D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (97ms)
√ can load all Catagories that have a certain parent (43ms)
√ can load a product by id
√ can load all products in a Catagory with sub-catagories
√ can load user cart
error null
√ can save user cart


6 passing (785ms)


D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (83ms)
√ can load all Catagories that have a certain parent
√ can load a product by id (39ms)
√ can load all products in a Catagory with sub-catagories
√ can load user cart
error null
1) "before each" hook


5 passing (797ms)
1 failing

1) Store API "before each" hook:
Uncaught TypeError: Cannot read property 'data' of null
at test-6passing.js:243:17
at node_modules\mongoose\lib\query.js:1173:16
at node_modules\mongoose\node_modules\kareem\index.js:109:16




D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js

D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>mocha test-6passing.js


Store API
express-session deprecated undefined resave option; provide resave option auth.j
s:57:39
express-session deprecated undefined saveUninitialized option; provide saveUnini
tialized option auth.js:57:39
√ can load a Catagory by id (93ms)
√ can load all Catagories that have a certain parent (38ms)
√ can load a product by id
√ can load all products in a Catagory with sub-catagories
√ can load user cart
error null
√ can save user cart


6 passing (806ms)


D:\Programs_Insalled\nodejs\finalMEAN\edx\retailStore>

所以问题:

  1. 我做错了吗
  2. 我的方法不对吗
  3. mocha 中是否存在我不知道的问题
  4. 原来是这样

我的环境是MongoDB、Node、Express、Windows

编辑:完整代码可以在这里找到:

https://github.com/shoaibhb/retailStore

最佳答案

我不会称之为问题的解决方案,但它解决了我的问题。我更改了 beforeEach() 函数,以便在每个测试 Ant 稳定数据之前分别处理数据的创建和删除。

这是我所做的代码。

 beforeEach(function(done) {
// Make sure categories are empty before each test
Category.remove({}, function(error) {
assert.ifError(error);
Product.remove({}, function(error) {
assert.ifError(error);
User.remove({}, function(error) {
assert.ifError(error);
done();
});
});
});
});

beforeEach(function(done) {
var categories = [
{ _id: 'Electronics' },
{ _id: 'Phones', 'parent': 'Electronics' },
{ _id: 'Laptops', 'parent': 'Electronics' },
{ _id: 'Bacon' }
];

var products = [
{
name: 'LG G4',
category: { _id: 'Phones', ancestors: ['Electronics', 'Phones'] },
price: {
amount: 300,
currency: 'USD'
}
},
{
_id: PRODUCT_ID,
name: 'Asus Zenbook Prime',
category: { _id: 'Laptops', ancestors: ['Electronics', 'Laptops'] },
price: {
amount: 2000,
currency: 'USD'
}
},
{
name: 'Flying Pigs Farm Pasture Raised Pork Bacon',
category: { _id: 'Bacon', ancestors: ['Bacon'] },
price: {
amount: 20,
currency: 'USD'
}
}
];

var users = [{
profile: {
username: 'vkarpov15',
picture: 'http://pbs.twimg.com/profile_images/550304223036854272/Wwmwuh2t.png'
},
data: {
oauth: 'invalid',
cart: []
}
}];

Category.create(categories, function(error) {
assert.ifError(error);
Product.create(products, function(error) {
assert.ifError(error);
User.create(users, function(error) {
assert.ifError(error);
done();
});
});
});
});

关于node.js - 测试 : node. js/Mocha 时出现异常行为,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40305607/

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