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');
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describe('app', function(){
it('should handle socket errors', function(done){
var app = koa();
app.use(function *(next){
// triggers this.socket.writable == false
this.socket.emit('error', new Error('boom'));
});
app.on('error', function(err){
err.message.should.equal('boom');
done();
});
request(app.listen())
.get('/')
.end(function(){});
})
it('should not .writeHead when !socket.writable', function(done){
var app = koa();
app.use(function *(next){
// set .writable to false
this.socket.writable = false;
this.status = 204;
// throw if .writeHead or .end is called
this.res.writeHead =
this.res.end = function () {
throw new Error('response sent');
};
})
// hackish, but the response should occur in a single ticket
setImmediate(done);
request(app.listen())
.get('/')
.end(function(){});
})
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})
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describe('app.toJSON()', function(){
it('should work', function(){
var app = koa();
var obj = app.toJSON();
obj.should.eql({
outputErrors: false,
subdomainOffset: 2,
poweredBy: true,
env: 'test'
});
})
})
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describe('app.inspect()', function(){
it('should work', function(){
var app = koa();
var util = require('util');
var str = util.inspect(app);
})
})
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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();
});
})
it('should error when a non-generator function is passed', function(done){
var app = koa();
try {
app.use(function(){});
} catch (err) {
err.message.should.equal('app.use() requires a generator function');
done();
}
})
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})
describe('app.respond', function(){
describe('when this.respond === false', function(){
it('should bypass app.respond', function(done){
var app = koa();
app.use(function *(){
this.body = 'Hello';
this.respond = false;
var res = this.res;
setImmediate(function () {
res.setHeader('Content-Type', 'text/plain');
res.end('lol');
})
})
var server = app.listen();
request(server)
.get('/')
.expect(200)
.expect('lol')
.end(done);
})
})
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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();
});
})
it('should respond with a 404 if no body was set', function(done){
var app = koa();
app.use(function *(){
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})
var server = app.listen();
request(server)
.head('/')
.expect(404, done);
})
it('should respond with a 200 if body = ""', function(done){
var app = koa();
app.use(function *(){
this.body = '';
})
var server = app.listen();
request(server)
.head('/')
.expect(200, done);
})
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})
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);
})
})
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describe('when res has already been written to', function(){
it('should not cause an app error', function(done){
var app = koa();
app.use(function *(next){
var res = this.res;
res.setHeader("Content-Type", "text/html")
res.status = 200;
res.write('Hello');
setTimeout(function () {
res.end("Goodbye")
}, 0);
});
var errorCaught = false;
app.on('error', function (err) {
errorCaught = err;
});
var server = app.listen();
request(server)
.get('/')
.expect(200)
.end(function(err, res){
if (err) return done(err);
if (errorCaught) return done(errorCaught);
done();
});
})
it('should send the right body', function(done){
var app = koa();
app.use(function *(next){
var res = this.res;
res.setHeader("Content-Type", "text/html")
res.status = 200;
res.write('Hello');
setTimeout(function () {
res.end("Goodbye")
}, 0);
});
var server = app.listen();
request(server)
.get('/')
.expect(200)
.expect('HelloGoodbye', done);
})
})
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describe('when .body is missing', function(){
describe('with status=400', function(){
it('should respond with the associated status message', function(done){
var app = koa();
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app.use(function *(){
this.status = 400;
});
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var server = app.listen();
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request(server)
.get('/')
.expect(400)
.expect('Bad Request', done);
})
})
describe('with status=204', function(){
it('should respond without a body', function(done){
var app = koa();
app.use(function *(){
this.status = 204;
})
var server = app.listen();
request(server)
.get('/')
.expect(204)
.expect('')
.end(function (err, res) {
if (err) return done(err);
res.header.should.not.have.property('content-type');
done();
})
})
})
describe('with status=205', function(){
it('should respond without a body', function(done){
var app = koa();
app.use(function *(){
this.status = 205;
})
var server = app.listen();
request(server)
.get('/')
.expect(205)
.expect('')
.end(function (err, res) {
if (err) return done(err);
res.header.should.not.have.property('content-type');
done();
})
})
})
describe('with status=304', function(){
it('should respond without a body', function(done){
var app = koa();
app.use(function *(){
this.status = 304;
})
var server = app.listen();
request(server)
.get('/')
.expect(304)
.expect('')
.end(function (err, res) {
if (err) return done(err);
res.header.should.not.have.property('content-type');
done();
})
})
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})
})
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('{"hello":"world"}', done);
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})
})
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);
})
})
})
describe('app.context', function(){
var app1 = koa();
app1.context.message = 'hello';
var app2 = koa();
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it('should merge properties', function(done){
app1.use(function *(next){
assert.equal(this.message, 'hello')
this.status = 204
});
request(app1.listen())
.get('/')
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.expect(204, done);
})
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it('should not affect the original prototype', function(done){
app2.use(function *(next){
assert.equal(this.message, undefined)
this.status = 204;
});
request(app2.listen())
.get('/')
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.expect(204, done);
})
})
describe('app.request', function(){
var app1 = koa();
app1.request.message = 'hello';
var app2 = koa();
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it('should merge properties', function(done){
app1.use(function *(next){
assert.equal(this.request.message, 'hello')
this.status = 204
});
request(app1.listen())
.get('/')
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.expect(204, done);
})
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it('should not affect the original prototype', function(done){
app2.use(function *(next){
assert.equal(this.request.message, undefined)
this.status = 204;
});
request(app2.listen())
.get('/')
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.expect(204, done);
})
})
describe('app.response', function(){
var app1 = koa();
app1.response.message = 'hello';
var app2 = koa();
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it('should merge properties', function(done){
app1.use(function *(next){
assert.equal(this.response.message, 'hello')
this.status = 204
});
request(app1.listen())
.get('/')
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.expect(204, done);
})
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it('should not affect the original prototype', function(done){
app2.use(function *(next){
assert.equal(this.response.message, undefined)
this.status = 204;
});
request(app2.listen())
.get('/')
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.expect(204, done);
})
})