Added tests.

lib/active_model_serializers.rb

@@ -7,7 +7,13 @@ ActiveModel::Serialization.class_eval do
   module ClassMethods #:nodoc:
     def active_model_serializer
       return @active_model_serializer if defined?(@active_model_serializer)
-      @active_model_serializer = "#{self.name}Serializer".safe_constantize
+
+      # Use safe constantize when Rails 3.2 is out
+      begin
+        @active_model_serializer = "#{self.name}Serializer".constantize
+      rescue NameError => e
+        raise unless e.message =~ /uninitialized constant$/ && e.name.to_s == "#{self.name}Serializer"
+      end
     end
   end
 

lib/generators/serializer/serializer_generator.rb

@@ -1,6 +1,7 @@
 module Rails
   module Generators
     class SerializerGenerator < NamedBase
+      source_root File.expand_path("../templates", __FILE__)
       check_class_collision :suffix => "Serializer"
 
       argument :attributes, :type => :array, :default => [], :banner => "field:type field:type"
@@ -26,8 +27,9 @@ module Rails
       def parent_class_name
         if options[:parent]
           options[:parent]
-        elsif (n = Rails::Generators.namespace) && n.const_defined?(:ApplicationSerializer)
-          "ApplicationSerializer"
+        # Only works on 3.2
+        # elsif (n = Rails::Generators.namespace) && n.const_defined?(:ApplicationSerializer)
+        #   "ApplicationSerializer"
         elsif Object.const_defined?(:ApplicationSerializer)
           "ApplicationSerializer"
         else

lib/rails/generators/test_unit/serializer/serializer_generator.rb

@@ -1,13 +0,0 @@
-require 'rails/generators/test_unit'
-
-module TestUnit
-  module Generators
-    class SerializerGenerator < Base
-      check_class_collision :suffix => "SerializerTest"
-
-      def create_test_files
-        template 'unit_test.rb',  File.join('test/unit', class_path, "#{file_name}_serializer_test.rb")
-      end
-    end
-  end
-end

lib/rails/generators/test_unit/serializer/templates/unit_test.rb

@@ -1,9 +0,0 @@
-require 'test_helper'
-
-<% module_namespacing  do -%>
-class <%= class_name %>SerializerTest < ActiveSupport::TestCase
-  # test "the truth" do
-  #   assert true
-  # end
-end
-<% end  -%>