Why am I getting unititialized constant in my Rspec model test? - ruby-on-rails

Question

I'm trying to create a test with Rspec in my rails application but I keep getting the following error.
uninitialized constant Build
# ./spec/models/build_spec.rb:3:in `<top (required)>'
No examples found.
I am running rails version 6.1.4.1. I also know that my model exists as I can create new objects that belong to that table in the ruby console.
here is my rspec file (spec/models/build_spec.rb)
require 'spec_helper'
RSpec.describe Build, type: :model do
it "Has a name"
it "is not valid without name"
it "is not valid with too short name"
it "is not valid with too long of a name"
end
here is my gemfile
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '2.7.4'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
gem 'rails', '~> 6.1.4', '>= 6.1.4.1'
# Use Puma as the app server
gem 'puma', '~> 5.0'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 5.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
gem 'bcrypt', '~> 3.1.7'
# Use Active Storage variant
# gem 'image_processing', '~> 1.2'
gem 'will_paginate', '~> 3.3'
# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.4', require: false
group :development, :test do
# Use sqlite3 as the database for Active Record
gem 'sqlite3', '~> 1.4.2'
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
# Access an interactive console on exception pages or by calling 'console' anywhere in the code.
gem 'web-console', '>= 4.1.0'
# Display performance information such as SQL time and flame graphs for each request in your browser.
# Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
gem 'rack-mini-profiler', '~> 2.0'
end
group :test do
# Adds support for Capybara system testing and selenium driver
gem 'capybara', '>= 3.26'
gem 'selenium-webdriver'
# Easy installation and use of web drivers to run system tests with browsers
gem 'webdrivers'
gem 'rspec-rails', '>= 3.9.0'
end
group :production do
gem 'pg', '~> 1.1'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Answer 1

spec_helper does not load the environment (this includes not loading the models). You could either require the model file explicitly in this spec or require rails_helper instead.

Answer 2

Check you have the right model inside the app/models/ directory.
spec/models/build_spec.rb
require 'rails_helper'
RSpec.describe Build, type: :model do
it { expect(described_class.new).to be_a() }
end
app/models/build.rb
class Build < ApplicationRecord
end
Hope this works for you.