module Shoulda module Matchers module ActiveRecord # The `have_readonly_attribute` matcher tests usage of the # `attr_readonly` macro. # # class User < ActiveRecord::Base # attr_readonly :password # end # # # RSpec # RSpec.describe User, type: :model do # it { should have_readonly_attribute(:password) } # end # # # Minitest (Shoulda) # class UserTest < ActiveSupport::TestCase # should have_readonly_attribute(:password) # end # # @return [HaveReadonlyAttributeMatcher] # def have_readonly_attribute(value) HaveReadonlyAttributeMatcher.new(value) end # @private class HaveReadonlyAttributeMatcher def initialize(attribute) @attribute = attribute.to_s end attr_reader :failure_message, :failure_message_when_negated def matches?(subject) @subject = subject if readonly_attributes.include?(@attribute) @failure_message_when_negated = "Did not expect #{@attribute} to be read-only" true else if readonly_attributes.empty? @failure_message = "#{class_name} attribute #{@attribute} " << 'is not read-only' else @failure_message = "#{class_name} is making " << "#{readonly_attributes.to_a.to_sentence} " << "read-only, but not #{@attribute}." end false end end def description "make #{@attribute} read-only" end private def readonly_attributes @readonly_attributes ||= (@subject.class.readonly_attributes || []) end def class_name @subject.class.name end end end end end