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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop enforces consistent use of `Object#is_a?` or `Object#kind_of?`.
#
# @example EnforcedStyle: is_a? (default)
# # bad
# var.kind_of?(Date)
# var.kind_of?(Integer)
#
# # good
# var.is_a?(Date)
# var.is_a?(Integer)
#
# @example EnforcedStyle: kind_of?
# # bad
# var.is_a?(Time)
# var.is_a?(String)
#
# # good
# var.kind_of?(Time)
# var.kind_of?(String)
#
class ClassCheck < Cop
include ConfigurableEnforcedStyle
MSG = 'Prefer `Object#%<prefer>s` over `Object#%<current>s`.'.freeze
def_node_matcher :class_check?, '(send _ ${:is_a? :kind_of?} _)'
def on_send(node)
class_check?(node) do |method_name|
return if style == method_name
add_offense(node, location: :selector)
end
end
def autocorrect(node)
lambda do |corrector|
replacement = node.method?(:is_a?) ? 'kind_of?' : 'is_a?'
corrector.replace(node.loc.selector, replacement)
end
end
def message(node)
if node.method?(:is_a?)
format(MSG, prefer: 'kind_of?', current: 'is_a?')
else
format(MSG, prefer: 'is_a?', current: 'kind_of?')
end
end
end
end
end
end
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