rspec_multiple_change_matcher.rb

def change_multiple(list, item_field, expected_changes = ->(x) { x })
  change_matcher = lambda { |item|
    expected_changes.call(
      change { item.reload[item_field] }
    )
  }
  first_item = list.first
  rest = list[1..-1]
  first_matcher = change_matcher.call(first_item)
  rest.inject(first_matcher) do |matcher, item|
    matcher.and(
      change_matcher.call(item)
    )
  end
end

# Example of use:

it 'updates the question‘s activity' do
  expect {
    subject
  }.to change_multiple(Question.all, :activity_id, ->(x) { x.from(nil).to(Integer) })
end