使用express，node.js构建的restful api的单元测试记录（使用mocha，supertest和chai）

Question

I write the a simple unit test with mocha, chai and supertest.

describe('controller.CWEManagementAPI', function () {
it('should be able to say hello', function() { 
    var request = require('supertest')
    , express = require('express');

    var app = express();

    app.get('/user', function(req, res){
        res.send(201, { name: 'tobi' });
    });

    request(app)
    .get('/user')
    .set('Accept', 'application/json')
    .expect(200)
    .end(function(err, res){
        if (err) return done(err);
        console.log('test');
        assert.equal( res.body.name, 'tobi');
        done()
    });
});
});

But the problem is that : the console.log('test') is not executed. So I think the assert.equal( res.body.name, 'tobi'); is not executed either. And so I write the code without unit testing, like :

var request = require('supertest')
, express = require('express');

var app = express();

app.get('/user', function(req, res){
res.send(201, { name: 'tobi' });
});

request(app)
   .get('/user')
   .expect('Content-Type', /json/)
   .expect('Content-Length', '20')
   .expect(201)
   .end(function(err, res){ 
    if (err) throw err;
    console.log(res.body.name);
    console.log('done');
    process.exit();
   });

And the console.log() are all executed. so I don't know why the first code can not show the logging info.

Answer 1

What you are trying to run is an asynchronous test with mocha. So the test case should receive a callback parameter to invoke once it's done with its actions.

You are invoking done() at the end but haven't received it as a parameter.

change

it('should be able to say hello', function() {
}

to

it('should be able to say hello', function(done) {
}