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)', () => {
it('should compose middleware', done => {
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const app = new Koa();
const calls = [];
app.use((ctx, next) => {
calls.push(1);
return next().then(() => {
calls.push(6);
});
});
app.use((ctx, next) => {
calls.push(2);
return next().then(() => {
calls.push(5);
});
});
app.use((ctx, next) => {
calls.push(3);
return next().then(() => {
calls.push(4);
});
});
const server = app.listen();
request(server)
.get('/')
.expect(404)
.end(err => {
if (err) return done(err);
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', 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', () => {
const app = new Koa();
[null, undefined, 0, false, 'not a function'].forEach(v => (() => app.use(v)).should.throw('middleware must be a function!'));
});
it('should throw error for generator', () => {
const app = new Koa();
(() => app.use(function *(){})).should.throw(/.+/);
});
it('should throw error for non function', () => {
const app = new Koa();
(() => app.use('not a function')).should.throw('middleware must be a function!');
});
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});