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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module RSpec
# Prefer using `be_empty` when checking for an empty array.
#
# @example
# # bad
# expect(array).to contain_exactly
# expect(array).to match_array([])
#
# # good
# expect(array).to be_empty
#
class BeEmpty < Base
extend AutoCorrector
MSG = 'Use `be_empty` matchers for checking an empty array.'
RESTRICT_ON_SEND = %i[contain_exactly match_array].freeze
# @!method expect_array_matcher?(node)
def_node_matcher :expect_array_matcher?, <<~PATTERN
(send
(send nil? :expect _)
#Runners.all
${
(send nil? :match_array (array))
(send nil? :contain_exactly)
}
)
PATTERN
def on_send(node)
expect_array_matcher?(node.parent) do |expect|
add_offense(expect) do |corrector|
corrector.replace(expect, 'be_empty')
end
end
end
end
end
end
end
Version data entries
17 entries across 17 versions & 4 rubygems