Feature: Delete a project

As a vision user
I want to delete a project
So that I can remove projects no longer in use

Let's add a test to ./test/project.js for our feature Delete a project. This resource will DELETE a project at route /project/:id and return a 204 No Content status:

describe('when deleting an existing resource /project/:id', function(){
  it('should respond with 204', function(done){
    request(app)
    .del('/project/' + id)
    .expect(204, done);
  });
});

Let's implement the Delete a project feature ./lib/project/index.js and add a del function. We attempt to delete a project by calling the static function Project.findOne. If we get an error, we return it; if we cannot find the project, we return null. If we find the project, we delete it and return an empty response.

Project.prototype.del = function(id, callback){
  var query = {'_id': id};

  ProjectSchema.findOne(query, function(error, project) {
    if (error) return callback(error, null);
    if (project == null) return...