koa-lite/test/application/use.js

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'use strict';
const request = require('supertest');
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const Koa = require('../..');
describe('app.use(fn)', function(){
it('should compose middleware', function(done){
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const app = new Koa();
const calls = [];
app.use(function *(ctx, next){
calls.push(1);
yield next();
calls.push(6);
});
app.use(function *(ctx, next){
calls.push(2);
yield next();
calls.push(5);
});
app.use(function *(ctx, next){
calls.push(3);
yield next();
calls.push(4);
});
const server = app.listen();
request(server)
.get('/')
.expect(404)
.end(function(err){
if (err) return done(err);
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calls.should.eql([1, 2, 3, 4, 5, 6]);
done();
});
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});
// https://github.com/koajs/koa/pull/530#issuecomment-148138051
it('should catch thrown errors in non-async functions', function(done){
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const app = new Koa();
app.use(ctx => {
ctx.throw('Not Found', 404);
});
request(app.listen())
.get('/')
.expect(404)
.end(done);
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});
it('should throw error for non function', function(done){
const app = new Koa();
(() => app.use('not a function')).should.throw('middleware must be a function!');
done();
});
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});