WIP: Adding tests

docs/general/adapters.md

@@ -49,3 +49,7 @@ If you want to have a root key in your responses you should use the Json adapter
 ```ruby
 ActiveModel::Serializer.config.adapter = :json
 ```
+
+## Registering an adapter
+
+ActiveModel::Serializer::Adapter.register(:my_adapter, MyAdapter)

lib/active_model/serializer/adapter.rb

@@ -21,6 +21,7 @@ def adapter_map
 
         def register(name, klass)
           adapter_map.update(name.to_s.underscore => klass)
+          self
         end
 
         def get(adapter)
@@ -47,10 +48,6 @@ def find_by_name(adapter_name)
         end
         private :find_by_name
 
-        def get!(adapter)
-          get(adapter) do |failure_message| fail ArgumentError, failure_message end
-        end
-
         def adapters
           adapter_map.keys.sort
         end

test/adapter_test.rb

@@ -19,17 +19,6 @@ def test_serializer
         assert_equal @serializer, @adapter.serializer
       end
 
-      def test_adapter_class_for_known_adapter
-        klass = ActiveModel::Serializer::Adapter.adapter_class(:json_api)
-        assert_equal ActiveModel::Serializer::Adapter::JsonApi, klass
-      end
-
-      def test_adapter_class_for_unknown_adapter
-        assert_raises(ArgumentError) do
-          ActiveModel::Serializer::Adapter.adapter_class(:json_simple)
-        end
-      end
-
       def test_create_adapter
         adapter = ActiveModel::Serializer::Adapter.create(@serializer)
         assert_equal ActiveModel::Serializer::Adapter::FlattenJson, adapter.class

test/serializers/adapter_for_test.rb

@@ -20,7 +20,7 @@ def test_overwrite_adapter_with_symbol
         adapter = ActiveModel::Serializer.adapter
         assert_equal ActiveModel::Serializer::Adapter::Null, adapter
       ensure
-
+        ActiveModel::Serializer.config.adapter = @previous_adapter
       end
 
       def test_overwrite_adapter_with_class
@@ -45,6 +45,92 @@ def test_raises_exception_if_it_does_not_know_hot_to_infer_adapter
           ActiveModel::Serializer.adapter
         end
       end
+
+      def test_adapter_class_for_known_adapter
+        klass = ActiveModel::Serializer::Adapter.adapter_class(:json_api)
+        assert_equal ActiveModel::Serializer::Adapter::JsonApi, klass
+      end
+
+      def test_adapter_class_for_unknown_adapter
+        assert_raises(ArgumentError) do
+          ActiveModel::Serializer::Adapter.adapter_class(:json_simple)
+        end
+      end
+
+      def test_adapter_map
+        assert_equal ActiveModel::Serializer::Adapter.adapter_map, {
+          "json"              => ActiveModel::Serializer::Adapter::Json,
+          "json_api"          => ActiveModel::Serializer::Adapter::JsonApi,
+          "flatten_json"      => ActiveModel::Serializer::Adapter::FlattenJson,
+          "null"              => ActiveModel::Serializer::Adapter::Null
+        }
+      end
+
+      def test_adapters
+        assert_equal ActiveModel::Serializer::Adapter.adapters.sort, [
+          "flatten_json",
+          "json",
+          "json_api",
+          "null",
+        ]
+      end
+
+      def test_get_adapter_by_string_name
+        assert_equal ActiveModel::Serializer::Adapter.get("json"), ActiveModel::Serializer::Adapter::Json
+      end
+
+      def test_get_adapter_by_symbol_name
+        assert_equal ActiveModel::Serializer::Adapter.get(:json), ActiveModel::Serializer::Adapter::Json
+      end
+
+      def test_get_adapter_by_class
+        klass = ActiveModel::Serializer::Adapter::Json
+        assert_equal ActiveModel::Serializer::Adapter.get(klass), klass
+      end
+
+      # def test_get_adapter_from_environment
+      #   ActiveModel::Serializer::Adapter.const_set(:ClassFromEnvironment, Class.new)
+      #   # test
+      #   klass = ActiveModel::Serializer::Adapter::ClassFromEnvironment
+      #   name = "class_from_environment"
+      #   assert_equal ActiveModel::Serializer::Adapter.get(name), klass
+      #   assert ActiveModel::Serializer::Adapter.adapters.include?(name)
+      #   # cleanup
+      #   ActiveModel::Serializer::Adapter::ADAPTER_MAP.delete(name)
+      #   ActiveModel::Serializer::Adapter.send(:remove_const, :ClassFromEnvironment)
+      # end
+
+      def test_get_adapter_for_unknown_name
+        assert_raises(ArgumentError) do
+          ActiveModel::Serializer::Adapter.get(:json_simple)
+        end
+      end
+
+      def test_adapter
+        assert_equal ActiveModel::Serializer.config.adapter, :flatten_json
+        assert_equal ActiveModel::Serializer.adapter, ActiveModel::Serializer::Adapter::FlattenJson
+      end
+
+      def test_register_adapter
+        new_adapter_name  = :foo
+        new_adapter_klass = Class.new
+        ActiveModel::Serializer::Adapter.register(new_adapter_name, new_adapter_klass)
+        assert ActiveModel::Serializer::Adapter.adapters.include?("foo")
+        assert ActiveModel::Serializer::Adapter.get(:foo), new_adapter_klass
+        # cleanup
+        ActiveModel::Serializer::Adapter::ADAPTER_MAP.delete(new_adapter_name.to_s)
+      end
+
+      # def test_inherited_adapter_hooks
+      #   Object.const_set(:MyAdapter, Class.new)
+      #   my_adapter = MyAdapter
+      #   ActiveModel::Serializer::Adapter.inherited(my_adapter)
+      #   assert_equal ActiveModel::Serializer::Adapter.get(:my_adapter), MyAdapter
+      #   # ActiveModel::Serializer::Adapter.register(subclass.to_s.demodulize, subclass)
+      #   # cleanup
+      #   ActiveModel::Serializer::Adapter::ADAPTER_MAP.delete("my_adapter")
+      #   ActiveModel::Serializer::Adapter.send(:remove_const, :MyAdapter)
+      # end
     end
   end
 end

test/test_helper.rb

@@ -18,6 +18,12 @@
   @capture_warnings.after_tests
 end
 require 'active_model_serializers'
+# eager load autoloaded adapters
+require 'active_model/serializer/adapter'
+ActiveModel::Serializer::Adapter::Null
+ActiveModel::Serializer::Adapter::Json
+ActiveModel::Serializer::Adapter::FlattenJson
+ActiveModel::Serializer::Adapter::JsonApi
 
 # Use cleaner stream testing interface from Rails 5 if available
 # see https://github.com/rails/rails/blob/29959eb59d/activesupport/lib/active_support/testing/stream.rb