Favor ActiveSupport::TestCase over Minitest::Test

- Better minitest 4/5 support
- Better DSL
- Already available with no changes
- Consistent interface

test/serializers/adapter_for_test.rb

@@ -1,6 +1,6 @@
 module ActiveModel
   class Serializer
-    class AdapterForTest < Minitest::Test
+    class AdapterForTest < ActiveSupport::TestCase
       UnknownAdapterError = ::ActiveModel::Serializer::Adapter::UnknownAdapterError
 
       def setup

test/serializers/association_macros_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class AssociationMacrosTest < Minitest::Test
+    class AssociationMacrosTest < ActiveSupport::TestCase
       AuthorSummarySerializer = Class.new
       class AssociationsTestSerializer < Serializer
         belongs_to :author, serializer: AuthorSummarySerializer

test/serializers/associations_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class AssociationsTest < Minitest::Test
+    class AssociationsTest < ActiveSupport::TestCase
       def setup
         @author = Author.new(name: 'Steve K.')
         @author.bio = nil
@@ -158,7 +158,7 @@ module ActiveModel
         ::ARModels::Comment.delete_all
       end
 
-      class NamespacedResourcesTest < Minitest::Test
+      class NamespacedResourcesTest < ActiveSupport::TestCase
         class ResourceNamespace
           Post    = Class.new(::Model)
           Comment = Class.new(::Model)
@@ -200,7 +200,7 @@ module ActiveModel
         end
       end
 
-      class NestedSerializersTest < Minitest::Test
+      class NestedSerializersTest < ActiveSupport::TestCase
         Post    = Class.new(::Model)
         Comment = Class.new(::Model)
         Author  = Class.new(::Model)

test/serializers/attribute_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class AttributeTest < Minitest::Test
+    class AttributeTest < ActiveSupport::TestCase
       def setup
         @blog = Blog.new({ id: 1, name: 'AMS Hints', type: 'stuff' })
         @blog_serializer = AlternateBlogSerializer.new(@blog)

test/serializers/attributes_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class AttributesTest < Minitest::Test
+    class AttributesTest < ActiveSupport::TestCase
       def setup
         @profile = Profile.new({ name: 'Name 1', description: 'Description 1', comments: 'Comments 1' })
         @profile_serializer = ProfileSerializer.new(@profile)

test/serializers/cache_test.rb

@@ -3,7 +3,7 @@ require 'tmpdir'
 require 'tempfile'
 module ActiveModel
   class Serializer
-    class CacheTest < Minitest::Test
+    class CacheTest < ActiveSupport::TestCase
       include ActiveSupport::Testing::Stream
 
       def setup

test/serializers/configuration_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class ConfigurationTest < Minitest::Test
+    class ConfigurationTest < ActiveSupport::TestCase
       def test_collection_serializer
         assert_equal ActiveModel::Serializer::CollectionSerializer, ActiveModelSerializers.config.collection_serializer
       end

test/serializers/fieldset_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class FieldsetTest < Minitest::Test
+    class FieldsetTest < ActiveSupport::TestCase
       def test_fieldset_with_hash
         fieldset = ActiveModel::Serializer::Fieldset.new('post' => %w(id title), 'comment' => ['body'])
         expected = { :post => [:id, :title], :comment => [:body] }

test/serializers/meta_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class MetaTest < Minitest::Test
+    class MetaTest < ActiveSupport::TestCase
       def setup
         @blog = Blog.new(id: 1,
                          name: 'AMS Hints',

test/serializers/options_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class OptionsTest < Minitest::Test
+    class OptionsTest < ActiveSupport::TestCase
       def setup
         @profile = Profile.new(name: 'Name 1', description: 'Description 1')
       end

test/serializers/root_test.rb

@@ -2,7 +2,7 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class RootTest < Minitest::Test
+    class RootTest < ActiveSupport::TestCase
       def setup
         @virtual_value = VirtualValue.new(id: 1)
       end

test/serializers/serializer_for_test.rb

@@ -2,8 +2,8 @@ require 'test_helper'
 
 module ActiveModel
   class Serializer
-    class SerializerForTest < Minitest::Test
-      class CollectionSerializerTest < Minitest::Test
+    class SerializerForTest < ActiveSupport::TestCase
+      class CollectionSerializerTest < ActiveSupport::TestCase
         def setup
           @array = [1, 2, 3]
           @previous_collection_serializer = ActiveModelSerializers.config.collection_serializer
@@ -26,7 +26,7 @@ module ActiveModel
         end
       end
 
-      class SerializerTest < Minitest::Test
+      class SerializerTest < ActiveSupport::TestCase
         module ResourceNamespace
           Post    = Class.new(::Model)
           Comment = Class.new(::Model)