/*globals describe, it, beforeEach, afterEach */
/*jshint expr:true*/
var fs              = require('fs'),
    sinon           = require('sinon'),
    serveSharedFile = require('../../../server/middleware/serve-shared-file');

describe('serveSharedFile', function () {
    var res, req, next, sandbox;

    beforeEach(function () {
        sandbox = sinon.sandbox.create();

        res = sinon.spy();
        req = sinon.spy();
        next = sinon.spy();
    });

    afterEach(function () {
        sandbox.restore();
    });

    it('should return a middleware', function () {
        var result = serveSharedFile('robots.txt', 'text/plain', 3600);

        result.should.be.a.Function;
    });

    it('should skip if the request does NOT match the file', function () {
        var middleware = serveSharedFile('robots.txt', 'text/plain', 3600);
        req.url = '/favicon.ico';
        middleware(req, res, next);
        next.called.should.be.true;
    });

    it('should load the file and send it', function () {
        var middleware = serveSharedFile('robots.txt', 'text/plain', 3600),
            body = 'User-agent: * Disallow: /';
        req.url = '/robots.txt';

        sandbox.stub(fs, 'readFile', function (file, cb) {
            cb(null, body);
        });

        res = {
            writeHead: sinon.spy(),
            end: sinon.spy()
        };

        middleware(req, res, next);
        next.called.should.be.false;
        res.writeHead.called.should.be.true;
        res.writeHead.args[0][0].should.equal(200);
        res.writeHead.calledWith(200, sinon.match.has('Content-Type')).should.be.true;
        res.writeHead.calledWith(200, sinon.match.has('Content-Length')).should.be.true;
        res.writeHead.calledWith(200, sinon.match.has('ETag')).should.be.true;
        res.writeHead.calledWith(200, sinon.match.has('Cache-Control', 'public, max-age=3600')).should.be.true;

        res.end.calledWith(body).should.be.true;
    });

    it('should send the correct headers', function () {
        var middleware = serveSharedFile('robots.txt', 'text/plain', 3600),
            body = 'User-agent: * Disallow: /';
        req.url = '/robots.txt';

        sandbox.stub(fs, 'readFile', function (file, cb) {
            cb(null, body);
        });

        res = {
            writeHead: sinon.spy(),
            end: sinon.spy()
        };

        middleware(req, res, next);
        next.called.should.be.false;
        res.writeHead.called.should.be.true;
        res.writeHead.args[0][0].should.equal(200);
        res.writeHead.calledWith(200, sinon.match.has('Content-Type')).should.be.true;
        res.writeHead.calledWith(200, sinon.match.has('Content-Length')).should.be.true;
        res.writeHead.calledWith(200, sinon.match.has('ETag')).should.be.true;
        res.writeHead.calledWith(200, sinon.match.has('Cache-Control', 'public, max-age=3600')).should.be.true;
    });

    it('should replace {{blog-url}} in text/plain', function () {
        var middleware = serveSharedFile('robots.txt', 'text/plain', 3600),
            body = 'User-agent: {{blog-url}}';
        req.url = '/robots.txt';

        sandbox.stub(fs, 'readFile', function (file, cb) {
            cb(null, body);
        });

        res = {
            writeHead: sinon.spy(),
            end: sinon.spy()
        };

        middleware(req, res, next);
        next.called.should.be.false;
        res.writeHead.called.should.be.true;

        res.end.calledWith('User-agent: http://default.com:2368').should.be.true;
    });
});