How can I effectively test data in a Rails application?

How can I effectively test data in a Rails application?

You can use RSpec along with FactoryBot to create test data. Would you like a code example?

Yes, please provide a code example for testing a model.

Sure! Here's a simple example:

# spec/models/user_spec.rb
require 'rails_helper'

RSpec.describe User, type: :model do
  it 'is valid with valid attributes' do
    user = FactoryBot.build(:user)
    expect(user).to be_valid
  end
end

This tests if a user is valid with the attributes defined in your factory.

What if I want to test validations?

You can add tests for validations like this:

it 'is not valid without a name' do
  user = FactoryBot.build(:user, name: nil)
  expect(user).to_not be_valid
end

This checks that the user is invalid without a name.