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Contents
# encoding: utf-8
module RuboCop
module Cop
module Style
# This cop checks the args passed to `fail` and `raise`.
class RaiseArgs < Cop
include ConfigurableEnforcedStyle
def on_send(node)
return unless command?(:raise, node) || command?(:fail, node)
case style
when :compact
check_compact(node)
when :exploded
check_exploded(node)
end
end
private
def check_compact(node)
_receiver, selector, *args = *node
if args.size > 1
add_offense(node, :expression, message(selector)) do
opposite_style_detected
end
else
correct_style_detected
end
end
def check_exploded(node)
_receiver, selector, *args = *node
if args.size == 1
arg, = *args
if arg.type == :send && arg.loc.selector.is?('new')
_receiver, _selector, *constructor_args = *arg
# Allow code like `raise Ex.new(arg1, arg2)`.
if constructor_args.size <= 1
add_offense(node, :expression, message(selector)) do
opposite_style_detected
end
end
end
else
correct_style_detected
end
end
def message(method)
case style
when :compact
"Provide an exception object as an argument to `#{method}`."
when :exploded
'Provide an exception class and message as ' \
"arguments to `#{method}`."
end
end
end
end
end
end
Version data entries
24 entries across 24 versions & 2 rubygems