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# frozen_string_literal: true
require 'rails_helper'
RSpec.describe ProductCart, type: :model do
let(:product_cart) { create(:product_cart) }
it 'should belong to product' do
expect(product_cart).to respond_to(:product)
end
it 'should belong to cart' do
expect(product_cart).to respond_to(:cart)
end
describe '#sole_product_in_cart' do
it 'validates for duplicate products in the cart' do
another_product_cart = build(:product_cart, cart: product_cart.cart, product: product_cart.product)
expect(another_product_cart.save).to be_falsey
expect(another_product_cart.errors[:product_id]).to be_present
end
end
describe '#product_quantity' do
it "validates the requested quantity against the product's available quantity" do
product = create(:product, available_quantity: 5)
another_product_cart = build(:product_cart, cart: product_cart.cart, product:, quantity: 10)
expect(another_product_cart.save).to be_falsey
expect(another_product_cart.errors[:product_id][0]).to eq('not enough in existence')
end
end
end
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