Agile Web Development with Rails 6

Testing with RSpec

RSpec is an alternative to MiniTest, which Rails uses. It’s different in almost every way, and many developers prefer it. Here’s what one of our existing tests might look like, written in RSpec:

RSpec.describe Cart do

  let(:cart)     { Cart.create }
  let(:book_one) { products(:ruby) }
  let(:book_two) { products(:two) }

  before do
    cart.add_product(book_one).save!
    cart.add_product(book_two).save!
  end

  it "can have multiple products added" do
    expect(cart.line_items.size).to eq(2)
  end

  it "calculates the total price of all products" do
    expect(cart.total_price).to eq(book_one.price + book_two.price)
  end
end

It almost looks like a different programming ...