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# frozen_string_literal: true
module RuboCop
module Cop
module RSpec
# Checks for a specified error in checking raised errors.
#
# Enforces one of an Exception type, a string, or a regular
# expression to match against the exception message as a parameter
# to `raise_error`
#
# @example
# # bad
# expect {
# raise StandardError.new('error')
# }.to raise_error
#
# # good
# expect {
# raise StandardError.new('error')
# }.to raise_error(StandardError)
#
# expect {
# raise StandardError.new('error')
# }.to raise_error('error')
#
# expect {
# raise StandardError.new('error')
# }.to raise_error(/err/)
#
# expect { do_something }.not_to raise_error
#
class UnspecifiedException < Base
MSG = 'Specify the exception being captured'
RESTRICT_ON_SEND = %i[to].freeze
# @!method empty_raise_error_or_exception(node)
def_node_matcher :empty_raise_error_or_exception, <<-PATTERN
(send
(block
(send nil? :expect) ...)
:to
(send nil? {:raise_error :raise_exception})
)
PATTERN
def on_send(node)
return unless empty_exception_matcher?(node)
add_offense(node.children.last)
end
private
def empty_exception_matcher?(node)
empty_raise_error_or_exception(node) && !block_with_args?(node.parent)
end
def block_with_args?(node)
return unless node&.block_type?
node.arguments?
end
end
end
end
end
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20 entries across 20 versions & 4 rubygems