Confusion with using `let` in RSpec for testing ActiveModel validations in Ruby on Rails 7.1
I've searched everywhere and can't find a clear answer. I'm relatively new to this, so bear with me. I'm working with an scenario while writing tests for my ActiveModel validations using RSpec. I have a model called `User` with a validation that checks if the `email` attribute is present and formatted correctly. Here's a simplified version of the model: ```ruby class User include ActiveModel::Model attr_accessor :email validates :email, presence: true, format: { with: URI::MailTo::EMAIL_REGEXP } end ``` In my RSpec tests, I want to use `let` to define a user instance for testing validations. However, I'm seeing unexpected failures. Here's how I defined my tests: ```ruby RSpec.describe User, type: :model do let(:user) { User.new(email: email) } context 'when email is blank' do let(:email) { nil } it 'is not valid' do expect(user).not_to be_valid expect(user.errors[:email]).to include("need to be blank") end end context 'when email is invalid' do let(:email) { 'invalid_email' } it 'is not valid' do expect(user).not_to be_valid expect(user.errors[:email]).to include('is invalid') end end context 'when email is valid' do let(:email) { 'user@example.com' } it 'is valid' do expect(user).to be_valid end end end ``` I am getting failures on the first two tests because it seems like the `user` instance isn't picking up the `email` value correctly when using `let`. The behavior messages in the output indicate that the validations are not being triggered as expected. I have verified that RSpec is properly set up for my Rails 7.1 application. I tried moving the `user` initialization directly into each context, but that seems redundant. Am I misunderstanding how `let` works, or is there something specific about the order of execution in RSpec that I need to know? Any guidance would be appreciated! For context: I'm using Ruby on Windows. I'm working on a service that needs to handle this. Has anyone else encountered this? I appreciate any insights!