add testcase

Author: jNicker

lib/attr_json/attribute_definition.rb

@@ -132,7 +132,6 @@ def self.lookup_type(type)
         if type == :datetime || type == :time
           lookup_kwargs[:precision] = ActiveSupport::JSON::Encoding.time_precision
         end
-
         type = ActiveRecord::Type.lookup(type, **lookup_kwargs)
       elsif !(type.is_a?(ActiveModel::Type::Value) || type.is_a?(ActiveRecord::AttributeMethods::TimeZoneConversion::TimeZoneConverter))
         raise ArgumentError, "Second argument (#{type}) must be a symbol or instance of an ActiveModel::Type::Value subclass"

spec/record_spec.rb

@@ -242,13 +242,17 @@ def cast(value) ; value ; end
 
   it "can define without triggering a db connection" do
     expect(ActiveRecord::Base).not_to receive(:connection)
+    expect(ActiveRecord::Type).not_to receive(:adapter_name_from)
 
     Class.new(ActiveRecord::Base) do
       include AttrJson::Record
 
       self.table_name = "products"
       attr_json :value, :string
+      attr_json :datetime_value, :datetime
+      attr_json :time_value, :time
     end
+
   end
 
   it "has registered attributes on registry" do