koa-lite/test/application.js

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var request = require('supertest');
var assert = require('assert');
var http = require('http');
var koa = require('..');
var fs = require('fs');
describe('app.use(fn)', function(){
it('should compose middleware', function(done){
var app = koa();
var calls = [];
app.use(function *(next){
calls.push(1);
yield next;
calls.push(6);
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});
app.use(function *(next){
calls.push(2);
yield next;
calls.push(5);
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});
app.use(function *(next){
calls.push(3);
yield next;
calls.push(4);
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});
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var server = app.listen();
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request(server)
.get('/')
.end(function(err){
if (err) return done(err);
calls.should.eql([1,2,3,4,5,6]);
done();
});
})
})
describe('app.respond', function(){
describe('when HEAD is used', function(){
it('should not respond with the body', function(done){
var app = koa();
app.use(function *(){
this.body = 'Hello';
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});
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var server = app.listen();
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request(server)
.head('/')
.expect(200)
.end(function(err, res){
if (err) return done(err);
res.should.have.header('Content-Length', '5');
assert(0 == res.text.length);
done();
});
})
})
describe('when no middleware are present', function(){
it('should 404', function(done){
var app = koa();
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var server = app.listen();
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request(server)
.get('/')
.expect(404, done);
})
})
describe('when .body is missing', function(){
it('should respond with the associated status message', function(done){
var app = koa();
app.use(function *(){
this.status = 400;
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});
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var server = app.listen();
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request(server)
.get('/')
.expect(400)
.expect('Bad Request', done);
})
})
describe('when .body is a string', function(){
it('should respond', function(done){
var app = koa();
app.use(function *(){
this.body = 'Hello';
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});
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var server = app.listen();
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request(server)
.get('/')
.expect('Hello', done);
})
})
describe('when .body is a Buffer', function(){
it('should respond', function(done){
var app = koa();
app.use(function *(){
this.body = new Buffer('Hello');
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});
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var server = app.listen();
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request(server)
.get('/')
.expect('Hello', done);
})
})
describe('when .body is a Stream', function(){
it('should respond', function(done){
var app = koa();
app.use(function *(){
this.body = fs.createReadStream('package.json');
this.set('Content-Type', 'application/json');
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});
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var server = app.listen();
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request(server)
.get('/')
.expect('Content-Type', 'application/json')
.end(function(err, res){
if (err) return done(err);
var pkg = require('../package');
res.body.should.eql(pkg);
done();
});
})
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it('should handle errors', function(done){
var app = koa();
app.use(function *(){
this.set('Content-Type', 'application/json');
this.body = fs.createReadStream('does not exist');
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});
var server = app.listen();
request(server)
.get('/')
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.expect('Content-Type', 'text/plain; charset=utf-8')
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.expect(404)
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.end(done);
})
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})
describe('when .body is an Object', function(){
it('should respond with json', function(done){
var app = koa();
app.use(function *(){
this.body = { hello: 'world' };
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});
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var server = app.listen();
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request(server)
.get('/')
.expect('Content-Type', 'application/json')
.expect('{\n "hello": "world"\n}', done);
})
describe('when app.jsonSpaces is altered', function(){
it('should reflect in the formatting', function(done){
var app = koa();
app.jsonSpaces = 0;
app.use(function *(){
this.body = { hello: 'world' };
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});
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var server = app.listen();
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request(server)
.get('/')
.expect('Content-Type', 'application/json')
.expect('{"hello":"world"}', done);
})
})
})
describe('when an error occurs', function(){
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it('should emit "error" on the app', function(done){
var app = koa();
app.use(function *(){
throw new Error('boom');
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});
app.on('error', function(err){
err.message.should.equal('boom');
done();
});
request(app.listen())
.get('/')
.end(function(){});
})
describe('with an .expose property', function(){
it('should expose the message', function(done){
var app = koa();
app.use(function *(){
var err = new Error('sorry!');
err.status = 403;
err.expose = true;
throw err;
});
request(app.listen())
.get('/')
.expect(403, 'sorry!')
.end(done);
})
})
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describe('with a .status property', function(){
it('should respond with .status', function(done){
var app = koa();
app.use(function *(){
var err = new Error('s3 explodes');
err.status = 403;
throw err;
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});
request(app.listen())
.get('/')
.expect(403, 'Forbidden')
.end(done);
})
})
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it('should respond with 500', function(done){
var app = koa();
app.use(function *(){
throw new Error('boom!');
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});
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var server = app.listen();
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request(server)
.get('/')
.expect(500, 'Internal Server Error')
.end(done);
})
it('should be catchable', function(done){
var app = koa();
app.use(function *(next){
try {
yield next;
this.body = 'Hello';
} catch (err) {
error = err;
this.body = 'Got error';
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}
});
app.use(function *(next){
throw new Error('boom!');
this.body = 'Oh no';
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});
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var server = app.listen();
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request(server)
.get('/')
.expect(200, 'Got error')
.end(done);
})
})
})
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describe('app.context(obj)', function(){
it('should merge regular object properties', function(done){
var app = koa();
app.context({
a: 1,
b: 2
});
app.use(function *(next){
this.a.should.equal(1);
this.b.should.equal(2);
this.status = 204;
});
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var server = app.listen();
request(server)
.get('/')
.expect(204)
.end(done);
})
it('should merge accessor properties', function(done){
var app = koa();
app.context({
get something() {
return this._something || 'hi';
},
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set something(value) {
this._something = value;
}
});
app.use(function *(next){
this.something.should.equal('hi');
this.something = 'hello';
this.something.should.equal('hello');
this.status = 204;
});
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var server = app.listen();
request(server)
.get('/')
.expect(204)
.end(done);
})
it('should merge multiple objects', function(done){
var app = koa();
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app.context({
a: 1
});
app.context({
b: 2
});
app.use(function *(){
this.a.should.equal(1);
this.b.should.equal(2);
this.status = 204;
});
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var server = app.listen();
request(server)
.get('/')
.expect(204)
.end(done);
})
it('should not butcher the original prototype', function(done){
var app1 = koa();
var app2 = koa();
app1.context({
a: 1
});
app2.use(function *(next){
assert.equal(this.a, undefined);
this.status = 204;
});
var server = http.createServer(app2.callback());
request(server)
.get('/')
.expect(204)
.end(done);
})
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})