fix build in jruby

Gemfile

@@ -7,5 +7,5 @@ group :test do
   gem "multi_json", require: false
   gem "nokogiri", require: false
 end
-gem 'pry-byebug'
+gem 'pry-byebug', platform: :mri
 

test/test_helper.rb

@@ -1,23 +1,32 @@
-require 'pry-byebug'
+# frozen_string_literal: true
+
+begin
+  require 'pry-byebug'
+rescue LoadError
+end
+
 require 'representable'
 
 require 'minitest/autorun'
 require 'test_xml/mini_test'
 
-require "representable/debug"
+require 'representable/debug'
 require 'minitest/assertions'
 
-module MiniTest::Assertions
-  def assert_equal_xml(text, subject)
-    assert_equal (text.gsub("\n", "").gsub(/(\s\s+)/, "")), subject.gsub("\n", "").gsub(/(\s\s+)/, "")
+module MiniTest
+  module Assertions
+    def assert_equal_xml(text, subject)
+      assert_equal text.gsub("\n", '').gsub(/(\s\s+)/, ''), subject.gsub("\n", '').gsub(/(\s\s+)/, '')
+    end
   end
 end
 String.infect_an_assertion :assert_equal_xml, :must_xml
 
 # TODO: delete all that in 4.0:
 class Album
   attr_accessor :songs, :best_song
-  def initialize(songs=nil, best_song=nil)
+
+  def initialize(songs = nil, best_song = nil)
     @songs      = songs
     @best_song  = best_song
   end
@@ -29,7 +38,8 @@ def ==(other)
 
 class Song
   attr_accessor :name, :track # never change this, track rendered with Rails#to_json.
-  def initialize(name=nil, track=nil)
+
+  def initialize(name = nil, track = nil)
     @name   = name
     @track  = track
   end
@@ -47,9 +57,9 @@ def xml(document)
 
 module AssertJson
   module Assertions
-    def assert_json(expected, actual, msg=nil)
-      msg = message(msg, "") { diff expected, actual }
-      assert_equal(expected.split("").sort, actual.split("").sort, msg)
+    def assert_json(expected, actual, msg = nil)
+      msg = message(msg, '') { diff expected, actual }
+      assert_equal(expected.split('').sort, actual.split('').sort, msg)
     end
   end
 end
@@ -77,16 +87,18 @@ class AssertableDocument
     attr_reader :document
 
     def initialize(document, format)
-      @document, @format = document, format
+      @document = document
+      @format = format
     end
 
     def must_equal_document(*args)
       return document.must_equal_xml(*args) if @format == :xml
+
       document.must_equal(*args)
     end
   end
 
-  def self.representer!(options={}, &block)
+  def self.representer!(options = {}, &block)
     fmt = options # we need that so the 2nd call to ::let(within a ::describe) remembers the right format.
 
     name   = options[:name]   || :representer
@@ -119,25 +131,29 @@ def inject_representer(mod, options)
   end
 
   module TestMethods
-    def representer_for(modules=[Representable::Hash], &block)
+    def representer_for(modules = [Representable::Hash], &block)
       Module.new do
         extend TestMethods
         include(*modules)
         module_exec(&block)
       end
     end
 
-    alias_method :representer!, :representer_for
+    alias representer! representer_for
   end
   include TestMethods
 end
 
 class BaseTest < MiniTest::Spec
   let(:new_album)  { OpenStruct.new.extend(representer) }
-  let(:album)      { OpenStruct.new(:songs => ["Fuck Armageddon"]).extend(representer) }
-  let(:song) { OpenStruct.new(:title => "Resist Stance") }
-  let(:song_representer) { Module.new do include Representable::Hash; property :title end  }
-
+  let(:album)      { OpenStruct.new(songs: ['Fuck Armageddon']).extend(representer) }
+  let(:song) { OpenStruct.new(title: 'Resist Stance') }
+  let(:song_representer) do
+    Module.new do
+      include Representable::Hash
+      property :title
+    end
+  end
 end
 
 Band = Struct.new(:id, :name) do