Use node. js to implement the Function Test method

The Info
At the meeting last week, my colleagues said that they were now writing function test in Java, which generated a lot of redundant code and made the whole project bloated. There is an urgent need for a simple template project to quickly build a function test.

Then I went back and thought, why do we have to do function test in Java?

Server
To do the demo, it is natural to have the corresponding server to support.

In this case, we chose Express as the server.

First, we create a folder for the server and create a new package.json.

{
    "name": "wine-cellar",
    "description": "Wine Cellar Application",
    "version": "0.0.1",
    "private": true,
    "dependencies": {
        "express": "3.x"
    }
}
 

Now run command

npm install

So express was installed.

We implemented a few simple get post methods to do the experiment

var express = require('express')
  , app = express();
app.use(express.bodyParser());
app.get('/hello', function(req, res) {
    res.send("hello world");
});

app.get('/', function (req, res) {
  setTimeout(function () {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end();
  }, 200);
});
app.get('/hi', function (req, res) {
  if (req.param('hello') !== undefined) {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end('Hello!');
  } else {
    res.writeHead(500, {'Content-Type': 'text/plain'});
    res.end('use post instead');
  }
});
app.post('/hi', function (req, res) {
  setTimeout(function () {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end(req.param('message') || 'message');
  }, 100);
});

app.get('/user', function(req, res) {
    res.send(
      [
        {name:'jack'}, 
        {name:'tom'}
      ]
    );
});
app.get('/user/:id', function(req, res) {
    res.send({
        id: 1, 
        name: "node js", 
        description: "I am node js"
    });
});
app.post('/user/edit', function (req, res) {
  setTimeout(function () {
    res.send({
      id:req.param('id'),
      status:1
    });
  }, 100);
}); 
app.listen(3000);
console.log('Listening on port 3000...');

testosterone
With the server set up, it's natural to start testing.

The interface names of this project are very elegant, directly on the code.

The first is to test the basic functionality

var testosterone = require('testosterone')({port: 3000})
  , assert = testosterone.assert;
testosterone
  .get('/hello',function(res){
    assert.equal(res.statusCode, 200);
  })
  .get('/hi',function(res){
    assert.equal(res.statusCode, 500);
  })
  .post('/hi', {data: {message: 'hola'}}, {
    status: 200
    ,body: 'hola'
  });
 

Then do a simple test of the get post for the simulated user above.

var testosterone = require('testosterone')({port: 3000})
  , assert = testosterone.assert;
testosterone  
  .get('/user', function (res) {
    var expectRes = [
        {name:'jack'}, 
        {name:'tom'}
    ];
    assert.equal(res.statusCode, 200);
    assert.equal(JSON.stringify(JSON.parse(res.body)),JSON.stringify(expectRes));
  })
  .get('/user/1', function (res) {

    var user = JSON.parse(res.body);
    assert.equal(res.statusCode, 200);
    assert.equal(user.name, "node js");
    assert.equal(user.description,"I am node js");
  })

Next, if you want to use give when then for each test case, you can do this:

var testosterone = require('testosterone')({port: 3000, title: 'test user api'})
  , add = testosterone.add
  , assert = testosterone.assert;
testosterone
  .add(
    'GIVEN a user id  to /user/{id}  n' +
    'WHEN it have response user n' +
    'THEN it should return user json',
    function (cb) {
      testosterone.get('/user/1', cb(function (res) {
        var expectRes = {
            id: 1, 
            name: "node js", 
            description: "I am node js"
        };
        assert.equal(res.statusCode, 200);
        assert.equal(JSON.stringify(JSON.parse(res.body)), JSON.stringify(expectRes));
      }));
  })

  .add(
    'GIVEN a POST  a user info to /user/edit n' +
    'WHEN find modify success n' +
    'THEN it should resturn status 1',
    function (cb) {
      testosterone.post('/user/edit', {data: {id: 1, name: "change name"}}, cb(function (res) {
        var res = JSON.parse(res.body);
        assert.equal(res.status, 1);
      }));
    }
  ) 
  .run(function () {
    require('sys').print('done!');
  });

Conclusion
Through the above code, you can see that with Java's lengthy HTTP header Settings, etc., it is really much simpler and more elegant.