module Rubocop::Cop::Style::IfThenElse

def check(node)
  # We won't check modifier or ternary conditionals.
  if node.loc.expression.source =~ /\A(if|unless)\b/
    if offending_line(node)
      convention(node, :expression, error_message)
    end
  end
end

def on_if(node)
  check(node)
end

def on_unless(node)
  check(node)
end