无法执行单元测试
问题是测试没有通过，尽管在我执行测试时请求和响应数据已添加到数据库中。请提出一些通过此测试的方法。此测试没有出现预期的状态代码 200。集成测试正在我的应用程序上运行，但我无法调试此单元测试错误。
//testfile
var db = require('../mongodb'),
mongoose = require('mongoose'),
posts = require('../api/addTodo'),
should = require('should'),
testUtils = require('./utils');
describe("Add Api", function () {
var dummyPost, id;
before(function (done) {
mongoose.connect('mongodb://localhost:27017/todosdb_test', function() {
console.log('Connected To:'+'mongodb://localhost:27017/todosdb_test');
done();
});
dummyPost = new db.Todos({
'admin': 'Dumm_admin',
'text': 'Dummy',
'completed': true
});
dummyPost.save(function (err, post) {
if(err) {
console.log(err);
}
id = post._id;
});
});
describe("Create Post", function () {
it("should create a new todo", function (done) {
var req = {
body: {
'text': 'Blah blah',
'completed': false
},
session: {
'email': 'abc'
}
};
var res = testUtils.responseValidator(200, function (post) {
post.should.have.property('admin');
post.admin.should.equal('abc');
post.should.have.property('text');
post.text.should.equal('Blah blah');
post.should.have.property('completed');
post.completed.should.equal(false);
done();
});
console.log(req);
console.log(res);
posts.add(req, res);
});
});
after(function(done){
db.remove({}, function (err) {
if(err) {console.log(err);}
});
mongoose.disconnect(done);
});
});
// utils file
var responseValidator = function (expectedStatusCode, validationFunction) {
return{
json: function (statusCode, data) {
statusCode.should.equal(expectedStatusCode);
validationFunction(data);
},
send: function (statusCode, data) {
statusCode.should.equal(expectedStatusCode);
validationFunction(data);
}
}
};
module.exports = {
responseValidator
}
//mongodb file
var mongoose = require('mongoose')
mongoose.Promise= require('bluebird')
var schema1 = new mongoose.Schema({
admin : String,
text : String,
completed : Boolean
});
var schema2 = new mongoose.Schema({
password : String,
email: String
});
var Todos = mongoose.model('Todos', schema1);
var Accounts = mongoose.model('Accounts', schema2);
module.exports = {
Todos,
Accounts
}
//add api file
var db = require('../mongodb');
add = (req, res, next) => {
todoRes = {
text: req.body.text,
completed: req.body.completed
}
console.log(req.session.email);
db.Todos.findOne({ admin: req.session.email, text: todoRes.text })
.then(function (response) {
if (!response) {
var todo = new db.Todos({
"admin": req.session.email,
"text": todoRes.text,
"completed": false
});
todo.save()
.then(function (response) {
res.send({ 'status': 'Todo is added' })
})
.catch(function (e) {
res.send({ 'status': 'failure', Error: e });
});
}
else {
res.send({ 'status': 'todo already exist' });
status:'todo already exist';
}
})
.catch(function (e) {
res.send({ 'status': e })
})
};
module.exports = {
add
}
终端错误信息
> mytodos-app@0.0.0 test /Users/sumitkumarsahu/Desktop/mytodos-app
> mocha --recursive ./test/unit.test.js
Add Api
Connected To:mongodb://localhost:27017/todosdb_test
Create Post
{ body: { text: 'Blah blah', completed: false },
session: { email: 'abc' } }
{ json: [Function: json], send: [Function: send] }
abc
Unhandled rejection AssertionError: expected Object {
status: Error {
operator: 'to be',
expected: 200,
showDiff: false,
actual: Object { status: 'todo already exist' },
stackStartFunction: Function { name: 'assert' },
negate: false,
assertion: Assertion {
obj: Object { status: 'todo already exist' },
anyOne: false,
negate: false,
params: Object {
operator: 'to be',
expected: 200,
message: undefined,
showDiff: false,
actual: Object { status: 'todo already exist' },
stackStartFunction: Function { name: 'assert' },
negate: false,
assertion: [Circular]
},
onlyThis: undefined,
light: false
}
}
} to be 200
at Assertion.fail (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/should/cjs/should.js:258:17)
at Assertion.value (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/should/cjs/should.js:335:19)
at Object.send (/Users/sumitkumarsahu/Desktop/mytodos-app/test/utils.js:8:31)
at /Users/sumitkumarsahu/Desktop/mytodos-app/api/addTodo.js:33:8
at tryCatcher (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/bluebird/js/main/util.js:26:23)
at Promise._settlePromiseFromHandler (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/bluebird/js/main/promise.js:507:31)
at Promise._settlePromiseAt (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/bluebird/js/main/promise.js:581:18)
at Promise._settlePromises (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/bluebird/js/main/promise.js:697:14)
at Async._drainQueue (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/bluebird/js/main/async.js:123:16)
at Async._drainQueues (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/bluebird/js/main/async.js:133:10)
at Immediate.Async.drainQueues (/Users/sumitkumarsahu/Desktop/mytodos-app/node_modules/bluebird/js/main/async.js:15:14)
at runCallback (timers.js:672:20)
at tryOnImmediate (timers.js:645:5)
at processImmediate [as _immediateCallback] (timers.js:617:5)
1) should create a new todo
2) "after all" hook
0 passing (3s)
2 failing
1) Add Api Create Post should create a new todo:
Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.
2) Add Api "after all" hook:
TypeError: db.remove is not a function
at Context.<anonymous> (test/unit.test.js:57:20)
npm ERR! Test failed. See above for more details.
最佳答案
在您的添加 api 文件中，您与发送接口(interface):
res.send({ 'status': 'todo already exist' });
但在您的实用程序中您希望看到一个状态代码:
send: function (statusCode, data) {
statusCode.should.equal(expectedStatusCode);
validationFunction(data);
}
所以“错误”是 200 !== { 'status': 'todo already exist' }
但是，您并没有将这些错误抛给测试运行器，因此您没有看到测试错误，而是遇到了超时和未处理的异常。为了捕获这些，您需要返回由 posts.add 创建的 promise 并重新抛出异常。我还冒昧地修复了一个潜在的双重捕获问题，并修复了 promise 链以使下一步工作。
return db.Todos.findOne({ admin: req.session.email, text: todoRes.text })
.then(function (response) {
if (!response) {
var todo = new db.Todos({
"admin": req.session.email,
"text": todoRes.text,
"completed": false
});
// Need to return here to continue the promise chain!!
return todo.save()
.then(function (response) {
res.send(200, { 'status': 'Todo is added' })
})
.catch(function (e) {
res.send({ 'status': 'failure', Error: e });
throw e;
});
}
else {
res.send({ 'status': 'todo already exist' });
status:'todo already exist';
}
}, function (e) { // Need to move this error handler here otherwise res.send can be called Twice!!!
res.send({ 'status': e })
throw e;
});
现在我们可以等待测试完成。我还会将 responseValidator 转换为 stub 并将测试切换为基于 promise 的测试，我稍后可能会这样做，但让我们专注于让它发挥作用....
var res = testUtils.responseValidator(200, function (post) {
post.should.have.property('admin');
post.admin.should.equal('abc');
post.should.have.property('text');
post.text.should.equal('Blah blah');
post.should.have.property('completed');
post.completed.should.equal(false);
done();
});
console.log(req);
console.log(res);
// This is catch any exceptions (like an assertion) and pass it on the test runner
posts.add(req, res).catch(done);
要修复之后的问题，请尝试:
after(function(done){
db.remove({}, function (err) {
if(err) {console.log(err);}
mongoose.disconnect(done);
});
});
关于node.js - 在 Nodejs Express 中实现单元测试 - 意外失败，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/45649534/