it("should only accept Jive uris", function () {
            var builder = new ContentBuilder();
            builder.parent("/contents/1");
            builder.parent("/places/1");
            builder.parent("/people/1");

            var invalid_uris = ["a", "/a", "/a/1", "/places/ with whitespace" ];
            invalid_uris.forEach(function (uri) {
                expect(function () {
                    builder.parent(uri);
                }).to.throw(builder.INVALID_PARENT);
            });
        });
 expect(function () {
     builder.parent(uri);
 }).to.throw(builder.INVALID_PARENT);