happy path controller test generated by rails scaffold

courses_controller_test.rb

rails g scaffold course title:string start_day:date start_time:time cost:decimal approved:boolean picture:binary course_duration:integer   

require 'test_helper'

class CoursesControllerTest < ActionController::TestCase
  setup do
    @course = courses(:one)
  end

  test "should get index" do
    get :index
    assert_response :success
    assert_not_nil assigns(:courses)
  end

  test "should get new" do
    get :new
    assert_response :success
  end

  test "should create course" do
    assert_difference('Course.count') do
      post :create, course: { approved: @course.approved, cost: @course.cost, course_duration: @course.course_duration, picture: @course.picture, start_day: @course.start_day, start_time: @course.start_time, title: @course.title }
    end

    assert_redirected_to course_path(assigns(:course))
  end

  test "should show course" do
    get :show, id: @course
    assert_response :success
  end

  test "should get edit" do
    get :edit, id: @course
    assert_response :success
  end

  test "should update course" do
    patch :update, id: @course, course: { approved: @course.approved, cost: @course.cost, course_duration: @course.course_duration, picture: @course.picture, start_day: @course.start_day, start_time: @course.start_time, title: @course.title }
    assert_redirected_to course_path(assigns(:course))
  end

  test "should destroy course" do
    assert_difference('Course.count', -1) do
      delete :destroy, id: @course
    end

    assert_redirected_to courses_path
  end
end

course_test.rb

require 'test_helper'

class CourseTest < ActiveSupport::TestCase
  # test "the truth" do
  #   assert true
  # end
  
  def setup
   @course = Course.new 
 end
 
 #this test passes
 def test_valid
   assert @course.valid?  
 end
 
  #note that refute is the opposite of assert
  #19 mins into http://www.youtube.com/watch?v=H1Czc3NL4c4
 def test_invalid_without_title
   @coure.title = nil
   refute @course.valid
 end
 
  def teardown
      # Add code that need to be executed after each test
  end
 
end