Rspec doesn't see my model Class. uninitialized constant error

Question

I\'m writing tests on Rspec for my models in Ruby on Rails application. And I receive this error while starting \'rspec spec\'

command:
/spec/models/client_spec         


        

Answer 1

Your spec_helper file is missing some important commands. Specifically, it's not including config/environment and initializing rspec-rails.

You can add the following lines to the start of your spec/spec_helper.rb file

ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'rspec/autorun'

or you can just run

rails generate rspec:install

and overwrite your spec_helper with one generated for use with rspec-rails.

Answer 2

If other answers under this question don't work, try:

• Check if there is any typo in the file name or class name (they should match)

Other wise,

• Check your config/environment/test.rb file, see if there is config.eager_load = false, set it to true.

You should check in the written order since you don't want to solve the issue with the typo laying there.

Answer 3

I'm using Rails 5.0.0.1.
Here's how I resolved this concern.

On your Gemfile, please add -> gem 'rspec-rails', ">= 2.0.0.beta"

Like so,

group :development, :test do
  gem 'rspec-rails', ">= 2.0.0.beta"
end

Reason: if the rspec-rails is not added and when you execute the rspec command, it will generate this error -> "cannot load such file -- rails_helper"

Now, execute this command on the terminal.

bundle install

Once bundle command went good, execute the rails generate. Like so,

rails generate rspec:install

Reason: this command will create a new .rspec(hit overwrite when prompted), spec/rails_helper.rb and spec/spec_helper.rb

Now, at this point, rspec should pretty much run properly.
However, if you encounter an error where in the model is not found e.g. cannot load such file -- idea, try adding this on top of your spec/spec_helper.rb

require 'rubygems'
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)

Reason: seems that spec_helper is not loading the Rails environment. We're requiring it.

Hope this helps!

Answer 4

You might also like to add --require rails_helper in your .rspec file so that it looks like this.

--color
--require spec_helper
--require rails_helper

You won't need to require rails_helper in all your specs, after this.

Answer 5

Things have moved a bit since this thread has been created, I have experienced the uninitialized constant ClassName (NameError) error too using Ruby 2.1, Rails 4.2, rspec-rails 3.3.

I have solved my problems reading the rspec-rails gem documentation :

https://github.com/rspec/rspec-rails#model-specs

where it confirms what Swards says about requiring "rails_helper" not "spec_helper" anymore.

Also my model specification looks more like the one from the gem docs

RSpec.describe Url, :type => :model do
    it 'is invalid without first_name', :focus => true do
        client = Client.new
        client.should_not be_valid
    end
end

Answer 6

Factories folder define in your app

FactoryBot.define do
  factory :user_params , :class => 'User' do
    username 'Alagesan'
    password '$1234@..'

  end
end

Your Controller RSpec file:

it 'valid params' do
  post :register, params: {:user => user_params } 
end