extract validation matchers to minitest-activemodel

Gemfile

@@ -1,3 +1,5 @@
 source 'https://rubygems.org'
 
 gemspec
+
+gem 'minitest-activemodel', github: 'frodsan/minitest-activemodel'

lib/mongoid-minitest.rb

@@ -1,19 +1,13 @@
 gem 'minitest'
-require 'minitest/matchers'
+require 'minitest-activemodel'
 require 'matchers/matcher'
 require 'matchers/document/document'
 require 'matchers/document/have_field'
 require 'matchers/document/be_stored_in'
 require 'matchers/document/have_index'
 require 'matchers/validations/validations'
-require 'matchers/validations/presence'
-require 'matchers/validations/uniqueness'
-require 'matchers/validations/length'
-require 'matchers/validations/format'
 require 'matchers/validations/inclusion'
 require 'matchers/validations/exclusion'
-require 'matchers/validations/confirmation'
-require 'matchers/validations/acceptance'
 require 'matchers/validations/associated'
 require 'matchers/associations/associations'
 
@@ -22,5 +16,6 @@ module Matchers
     include Document
     include Validations
     include Associations
+    include MiniTest::Matchers::ActiveModel
   end
 end

mongoid-minitest.gemspec

@@ -23,5 +23,6 @@ Gem::Specification.new do |gem|
   gem.add_dependency 'minitest', '~> 4.1'
   gem.add_dependency 'minitest-matchers', '~> 1.2'
   gem.add_dependency 'mongoid' , '>= 3'
+  gem.add_dependency 'minitest-activemodel'
   gem.add_development_dependency 'rake'
 end