# Gemfile
group :test do
  gem 'timecop'
end

bundle install

require 'timecop'

Timecop.freeze(Time.local(2026, 5, 20, 14, 30)) do
  expect(Time.now.strftime('%Y-%m-%d')).to eq('2026-05-20')
end
# Time auto-restored after block

Timecop.travel(Time.local(2026, 12, 31, 23, 59, 0)) do
  sleep 5  # Real sleep
  expect(Time.now).to be_within(6.seconds).of(Time.local(2026, 12, 31, 23, 59, 5))
end

Timecop.freeze(Time.local(2026, 5, 20, 14, 30))
# ... test code
Timecop.return  # Restore

def test_something
  Timecop.freeze(...)
  begin
    # ...
  ensure
    Timecop.return
  end
end

Timecop.scale(3600) do            # 1 real-second = 1 simulated-hour
  start = Time.now
  sleep 1  # 1 sec real = 1hr simulated
  delta = Time.now - start
  expect(delta).to be_within(60).of(3600)
end

require 'active_support/time'

Time.zone = 'America/New_York'
Timecop.freeze(Time.zone.local(2026, 3, 8, 2, 30, 0)) do
  # Behaviour depends on Time.zone library — Rails ActiveSupport
  # has known DST-handling
  expect(...).to ...
end

# spec_helper.rb
RSpec.configure do |config|
  config.after(:each) { Timecop.return }   # Ensure cleanup
end

RSpec.describe BookingController do
  it 'rejects past dates' do
    Timecop.freeze(Date.new(2026, 5, 20)) do
      post :create, params: { date: '2026-05-19' }
      expect(response.status).to eq(400)
    end
  end
end

bundle exec rspec
bundle exec ruby -Itest test/

jobs:
  ruby-tests:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
      - uses: ruby/setup-ruby@v1
        with: { bundler-cache: true }
      - run: bundle exec rspec