koa-lite/test/response/last-modified.js

var response = require('../context').response;

describe('res.lastModified', function(){
  it('should set the header as a UTCString', function(){
    var res = response();
    var date = new Date();
    res.lastModified = date;
    res.header['last-modified'].should.equal(date.toUTCString());
  })

  it('should work with date strings', function(){
    var res = response();
    var date = new Date();
    res.lastModified = date.toString();
    res.header['last-modified'].should.equal(date.toUTCString());
  })

  it('should get the header as a Date', function(){
    // Note: Date() removes milliseconds, but it's practically important.
    var res = response();
    var date = new Date();
    res.lastModified = date;
    (res.lastModified.getTime() / 1000)
    .should.equal(Math.floor(date.getTime() / 1000));
  })
})