ruby on rails - Understand Test-Driven Development with Rspec and FactoryGirl -

here spec file:

require 'spec_helper'  describe user, "references"   { should have_and_belong_to_many(:roles) }   { should belong_to(:account_type) }   { should belong_to(:primary_sport).class_name("sport") }   { should belong_to(:school) }   { should belong_to(:city) } end   describe user, "factory"   before(:each)     @user = factorygirl.create(:user)   end    "is invalid no email"     @user.email = nil     @user.should_not be_valid   end    "is valid email"     @user.should be_valid   end end 

factory:

factorygirl.define   factory :user     email faker::internet.email     password "password"     password_confirmation "password"     agreed_to_age_requirements true   end  end 

the part trying "test" , not sure how 100% checking make sure when user created email address not nil.

shoulda provides validation helpers test validations.

it { should validate_presence_of(:email) } 

if want use rspec , write own, then

describe user   "should invalid without email"     user = factorygirl.build(:user, :email => nil)     @user.should_not be_valid     @user.errors.on(:email).should == 'can't blank' #not sure exact message. know when run test   end    "should valid email"     user = factorygirl.build(:user, :email => "user@user.com")     @user.should be_valid   end end 

when run test, read as

user   should invalid without email   should valid email 

giving description test case important, because kind of acts documentation.