class RuboCop::Cop::Lint::EmptyWhen

end
when baz then 2
when bar then 1
case foo
# good
@example
end
when baz then # nothing
when bar then 1
case foo
# bad
@example
This cop checks for the presence of ‘when` branches without a body.

def on_case(node) 

def on_case(node)
  node.each_when do |when_node|
    next if when_node.body
    add_offense(when_node, location: when_node.source_range)
  end
end