Timecop explained

timecop.rb

t = Time.local(2008, 9, 1, 10, 5, 0)

# Self-explained
Timecop.freeze(t) do
  expect(Time.zone.now.sec).to eq 0
end

# The same as above
Timecop.freeze(new_time)
expect(Time.zone.now.sec).to eq 0
Timecop.return

# Move to time and start counting as usual
Timecop.travel(t) do
  sleep(1)
  # travel time to + 1 sec
  puts Time.now
end

# Combo. Travel to time, allow it run and treat one second as hour
Timecop.travel(t) do
  Timecop.scale(3600) do
    sleep(1)
    # travel time + msecs + one hour
    puts Time.now

    sleep(1)
    # travel time + msecs + two hours
    puts Time.now
  end
end