[RUBY] Let's unit test with [rails] Rspec!

There are two types of tests: unit tests and integration tests.

-Unit test A test to see if it works properly for one program. (Example) For each model class

-Integration testing 1 Test for lotus processing. (Example) Flow from inputting and sending a value from the user's new registration screen until the record is added to the database

Introduction of "Rspec" and "factory_bot"

"Rspec" is a jem for testing, "Factory_bot" creates information temporarily when testing It is a help tool.

Therefore, let's install them all at once.

①jemno Installation


group :development, :test do
  gem 'rspec-rails'
  gem 'factory_bot_rails'


bundle install

(2) Install the minimum required file / directory structure of RSpec in Rails


$ rails g rspec:install
#>      create  .rspec                  #RSpec configuration file
#>      create  spec                    #Store specs
#>      create  spec/spec_helper.rb     #Helper for spec description
#>      create  spec/rails_helper.rb    #Helper for Rails-specific spec description

Add the required directories and files here.

③ Create necessary files Here is a validation test for the users model I will go.

◆ Test file The files in spec / are 1 for the rb file under test under app / Arrange in a one-to-one correspondence.

The specs for app / models / user.rb It will be spec / models / user_spec.rb.


◆ Data file for testing (factory_bot) By placing the factory in spec / factories You can easily use the test data.


④ File description

Set so that the namespace can be omitted.


RSpec.configure do |config|
+  config.include FactoryGirl::Syntax::Methods


--format documentation
--require spec_helper



FactoryBot.define do
  factory :user do
    nickname               {"taro"}
    email                  {"[email protected]"}
    password               {"00000000"}
    password_confirmation  {"00000000"}

⑤ Run the test


bundle exec rspec spec/models/user_spec.rb

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