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Versions: 8
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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Minitest
# This cop enforces the test to use `assert_nil`
# instead of using `assert_equal(nil, something)`.
#
# @example
# # bad
# assert_equal(nil, actual)
# assert_equal(nil, actual, 'message')
#
# # good
# assert_nil(actual)
# assert_nil(actual, 'message')
#
class AssertNil < Cop
include ArgumentRangeHelper
MSG = 'Prefer using `assert_nil(%<arguments>s)` over ' \
'`assert_equal(nil, %<arguments>s)`.'
def_node_matcher :assert_equal_with_nil, <<~PATTERN
(send nil? :assert_equal nil $_ $...)
PATTERN
def on_send(node)
assert_equal_with_nil(node) do |actual, message|
message = message.first
arguments = [actual.source, message&.source].compact.join(', ')
add_offense(node, message: format(MSG, arguments: arguments))
end
end
def autocorrect(node)
lambda do |corrector|
assert_equal_with_nil(node) do |actual|
corrector.replace(node.loc.selector, 'assert_nil')
corrector.replace(
first_and_second_arguments_range(node), actual.source
)
end
end
end
end
end
end
end
Version data entries
8 entries across 8 versions & 1 rubygems