class RuboCop::Cop::RSpec::ScatteredSetup


end
end
setup2
setup1
before do
describe Foo do
# good
end
before { setup2 }
before { setup1 }
describe Foo do
# bad
@example
Unify ‘before`, `after`, and `around` hooks when possible.
Checks for setup scattered across multiple hooks in an example group.

def lines_msg(numbers) 

def lines_msg(numbers)
  if numbers.size == 1
    "line #{numbers.first}"
  else
    "lines #{numbers.join(', ')}"
  end
end

def on_block(node) 

def on_block(node)
  return unless example_group?(node)
  repeated_hooks(node).each do |occurrences|
    lines = occurrences.map(&:first_line)
    occurrences.each do |occurrence|
      lines_except_current = lines - [occurrence.first_line]
      message = format(MSG, hook_name: occurrences.first.method_name,
                       lines: lines_msg(lines_except_current))
      add_offense(occurrence, message: message)
    end
  end
end

def repeated_hooks(node) 

def repeated_hooks(node)
  hooks = RuboCop::RSpec::ExampleGroup.new(node)
    .hooks
    .select(&:knowable_scope?)
    .group_by { |hook| [hook.name, hook.scope, hook.metadata] }
    .values
    .reject(&:one?)
  hooks.map do |hook|
    hook.map(&:to_node)
  end
end