Rspec validation failed: Photo can't be blank

Question

I am trying to create a test for a model which has a photo as a mandatory association. This is my model:

class Car < ApplicationRecord
  has_one_attached :photo

  validates :name, uniqueness: true
  validates :name, presence: true
  validates :photo, presence: true
end

and this is my test:

require 'rails_helper'

RSpec.describe 'Car', type: :model do
  let(:valid_attributes) do
    {
      name: 'Audi'
    }
  end

  it 'name is unique' do
    Car.create!(name: 'Audi')
    car = Car.new(name: 'Audi')
    expect(car).not_to be_valid
  end
end

The result of the test is:

Failures:

  1) Car name is unique
     Failure/Error: Car.create!(name: 'Audi')
     
     ActiveRecord::RecordInvalid:
       Validation failed: Photo can't be blank
     # ./spec/models/car_model_spec.rb:23:in `block (2 levels) in <main>'

What I can't do is attach a photo for testing. Do you have any tips?

Answer 1

As you have guessed, to pass the validation, you have to add a picture to your test :)

require 'rails_helper'

RSpec.describe 'Car', type: :model do
  let(:valid_attributes) do
    {
      name: 'Audi'
    }
  end

  let(:photo) do
    Rack::Test::UploadedFile.new(
      Rails.root.join('path/to/image.png'), 'image/png'
    )
  end

  it 'name is unique' do
    Car.create!(name: 'Audi', photo: photo)

    car = Car.new(name: 'Audi', photo: photo)
    expect(car).not_to be_valid
  end
end