error

bundle exec rspec spec/controllers/readers_controller_spec.rb 
..FF**

Pending:
  ReadersController POST create when save message returns to true redirects to root url
    # Not yet implemented
    # ./spec/controllers/readers_controller_spec.rb:45
  ReadersController POST create when save message returns to true assigns a success flash message
    # Not yet implemented
    # ./spec/controllers/readers_controller_spec.rb:46

Failures:

  1) ReadersController POST create sends new message to Reader class
     Failure/Error: post :create, reader: params
     NoMethodError:
       undefined method `save' for #<RSpec::Mocks::AllowanceTarget:0xa77e1ec>
     # ./app/controllers/readers_controller.rb:9:in `create'
     # ./spec/controllers/readers_controller_spec.rb:37:in `block (3 levels) in <top (required)>'

  2) ReadersController POST create sends save message to reader model
     Failure/Error: post :create
     ActionController::ParameterMissing:
       param is missing or the value is empty: reader
     # ./app/controllers/readers_controller.rb:16:in `reader_params'
     # ./app/controllers/readers_controller.rb:8:in `create'
     # ./spec/controllers/readers_controller_spec.rb:42:in `block (3 levels) in <top (required)>'

Finished in 0.12094 seconds (files took 3.36 seconds to load)
6 examples, 2 failures, 2 pending

Failed examples:

rspec ./spec/controllers/readers_controller_spec.rb:28 # ReadersController POST create sends new message to Reader class
rspec ./spec/controllers/readers_controller_spec.rb:39 # ReadersController POST create sends save message to reader model

readers_controller._spec.rb

require 'rails_helper'

RSpec.describe ReadersController, :type => :controller do

  describe "GET new" do  
    
    let(:reader) { instance_double("Reader", save: true) }
    
    it "assigns @reader variable to the view" do
      #reader = mock_model("Reader").as_new_record.as_null_object
      #reader = double(Reader)
      #Reader.stub(:new).and_return(reader)
      allow(Reader).to receive(:new).and_return(reader)
      #allow(Reader).to receive(:new) { reader }
      get :new
      expect(assigns[:reader]).to eq(reader)      
    end
    
    it "renders new template" do
      get :new
      expect(response).to render_template :new
    end
    
  end
  
  describe "POST create" do
    let(:reader) {allow(Reader)}
    it "sends new message to Reader class" do
      params = {
        "email" => "[email protected]",
        "password" => "pass",
        "password_confirmation" => "pass"
      }
      allow(Reader).to receive(:new).and_return(reader)
      expect(Reader).to receive(:new).with(params)
      #Reader.should_receive(:new).with(params)
      post :create, reader: params
    end
    it "sends save message to reader model" do
      allow(Reader).to receive(:new).and_return(reader)
      expect(reader).to receive(:save)
      post :create, reader: { add_yout_params } # XXX: you should pass params here!!!
    end
    context "when save message returns to true" do
      it "redirects to root url"
      it "assigns a success flash message"
    end
  end
  
end

readers_controller.rb

class ReadersController < ApplicationController
  
  def new
    @reader = Reader.new
  end
  
  def create
    @reader = Reader.new(reader_params)
    @reader.save    
    render nothing: true
  end
  
  private
    
    def reader_params
      params.require(:reader).permit(:email, :password, :password_confirmation )    
    end
    
end