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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module RSpec
# Ensures a consistent style is used when matching `nil`.
#
# You can either use the more specific `be_nil` matcher, or the more
# generic `be` matcher with a `nil` argument.
#
# This cop can be configured using the `EnforcedStyle` option
#
# @example `EnforcedStyle: be_nil` (default)
# # bad
# expect(foo).to be(nil)
#
# # good
# expect(foo).to be_nil
#
# @example `EnforcedStyle: be`
# # bad
# expect(foo).to be_nil
#
# # good
# expect(foo).to be(nil)
#
class BeNil < Base
extend AutoCorrector
include ConfigurableEnforcedStyle
BE_MSG = 'Prefer `be(nil)` over `be_nil`.'
BE_NIL_MSG = 'Prefer `be_nil` over `be(nil)`.'
RESTRICT_ON_SEND = %i[be be_nil].freeze
# @!method be_nil_matcher?(node)
def_node_matcher :be_nil_matcher?, <<-PATTERN
(send nil? :be_nil)
PATTERN
# @!method nil_value_expectation?(node)
def_node_matcher :nil_value_expectation?, <<-PATTERN
(send nil? :be nil)
PATTERN
def on_send(node)
case style
when :be
check_be_style(node)
when :be_nil
check_be_nil_style(node)
end
end
private
def check_be_style(node)
return unless be_nil_matcher?(node)
add_offense(node, message: BE_MSG) do |corrector|
corrector.replace(node.loc.expression, 'be(nil)')
end
end
def check_be_nil_style(node)
return unless nil_value_expectation?(node)
add_offense(node, message: BE_NIL_MSG) do |corrector|
corrector.replace(node.loc.expression, 'be_nil')
end
end
end
end
end
end
Version data entries
21 entries across 19 versions & 2 rubygems