property_based_testing_with_rantly

🎲 Property‑Based Testing with Rantly

Use the rantly and rantly-rspec gems to generate randomized inputs and verify invariants across a wide range of cases, catching edge conditions you might miss with example‑based specs.

# Gemfile:
gem 'rantly'
gem 'rantly-rspec'

# spec/models/order_spec.rb
require 'rantly/rspec_extensions'

RSpec.describe Order, type: :model do
  property_of { array(size: 10) { integer(0, 100) } }.check { |prices|
    order = Order.new(prices: prices)
    expect(order.total).to eq(prices.sum)
  }
end