My user_test.rb is failing on "Working with Associations"

require 'test_helper'

class UserTest < ActiveSupport::TestCase
    should have_many(:user_friendships)
    should have_many(:friends)


    test "a user should enter a first name" do
      user = User.new
      assert !user.save
      assert !user.errors[:first_name].empty?
  end


    test "a user should enter a last name" do
      user = User.new
      assert !user.save
      assert !user.errors[:last_name].empty?
  end

    test "a user should enter a profile name" do
      user = User.new
      assert !user.save
      assert !user.errors[:profile_name].empty?
  end

    test "a user should have a unique profile name" do
      user = User.new
      user.profile_name = users(:john).profile_name

      assert !user.save
      assert !user.errors[:profile_name].empty?
  end


    test "a user should have a rofile name without spaces" do
      user = User.new(first_name: 'Sean', last_name: 'OMurchu', email: 'soulwoody@gmail.com')
      user.password = user.password_confirmation = 'password'
      user.profile_name = "My Profile With Spaces"

      assert !user.save
      assert !user.errors[:profile_name].empty?
      assert user.errors[:profile_name].include?("Must be formatted correctly")
  end

    test "a user can have a correctly formatted profile name" do
      user = User.new(first_name: 'Sean', last_name: 'OMurchu', email: 'soulwoody@gmail.com')
      user.password = user.password_confirmation = 'password'

      user.profile_name = 'seanomurchu1'
      assert user.valid?
    end

    test "That no error is raised when trying to access a friend list" do
      assert_nothing_raised do
        users(:john).friends
      end

    end

    test "that creating friendships on a user works" do
      users(:john).friends << users(:mike)
      users(:john).friends.reload
      assert users(:john).friends.include?(users(:mike))
    end



end

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :email, :password, :password_confirmation, :remember_me,
                  :first_name, :last_name, :profile_name
  # attr_accessible :title, :body

  validates :first_name, presence: true

  validates :last_name, presence: true

  validates :profile_name, presence: true,
                           uniqueness: true,
                           format: {
                            with: /^[a-zA-Z0-9_-]+$/,
                            message: 'Must be formatted correctly'
                           }

  has_many :statuses, :dependent => :destroy
  has_many :user_friendships
  has_many :friends, through: :user_friendships


  def full_name
    first_name + " " + last_name
  end

  def gravatar_url
    stripped_email = email.strip
    downcased_email = stripped_email.downcase
    hash = Digest::MD5.hexdigest(downcased_email)

    "http://gravatar.com/avatar/#{hash}"
  end
end