Added tests for defaults method

    });

    });

    describe('defaults', function () {}); // TODO

    describe('should cover the defaults mechanism', function () {

        it("for overwriting the simple property's default", function () {

            var nonSimpleRP = rp.defaults({ simple: false });

            return expect(nonSimpleRP('http://localhost:4000/404')).to.be.fulfilled;

        });

        it("for overwriting the resolveWithFullResponse property's default", function () {

            var rpWithFullResp = rp.defaults({ resolveWithFullResponse: true });

            return rpWithFullResp('http://localhost:4000/200')

                .then(function (response) {

                    expect(response.statusCode).to.eql(200);

                });

        });

        it('for cascading overwrites', function () {

            var nonSimpleRP = rp.defaults({ simple: false });

            var nonSimpleRPWithFullResp = nonSimpleRP.defaults({ resolveWithFullResponse: true });

            return nonSimpleRPWithFullResp('http://localhost:4000/404')

                .then(function (response) {

                    expect(response.statusCode).to.eql(404);

                });

        });

        it('and not interfere with the original Request-Promise instance', function () {

            var rpWithFullResp = rp.defaults({ resolveWithFullResponse: true });

            return Bluebird.all([

                    rpWithFullResp('http://localhost:4000/200'),

                    rp('http://localhost:4000/200')

                ])

                .then(function (results) {

                    expect(results[0].statusCode).to.eql(200);

                    expect(results[1]).to.eql('GET /200');

                });

        });

        it('for setting the transform property', function () {

            var rpWithTransform = rp.defaults({ transform: function (body) { return body.split('/'); }});

            return rpWithTransform('http://localhost:4000/200')

                .then(function (body) {

                    expect(body).to.eql(['GET ', '200']);

                });

        });

    });

    describe('should still allow a callback', function () {

    describe('should still allow a callback', function () {