move some files into spec/support and include ModelHelpers in config

spec/support/test_model.rb

@@ -0,0 +1,62 @@
+module TestModel
+  extend ActiveSupport::Concern
+  extend ActiveModel::Translation
+  include ActiveModel::Validations
+  include ActiveModel::AttributeMethods
+
+  included do
+    attribute_method_suffix ""
+    attribute_method_suffix "="
+    cattr_accessor :model_attributes
+  end
+
+  module ClassMethods
+    def attribute(name, type)
+      self.model_attributes ||= {}
+      self.model_attributes[name] = type
+    end
+
+    def define_method_attribute=(attr_name)
+      generated_attribute_methods.module_eval("def #{attr_name}=(new_value); @attributes['#{attr_name}']=self.class.type_cast('#{attr_name}', new_value); end", __FILE__, __LINE__)
+    end
+
+    def define_method_attribute(attr_name)
+      generated_attribute_methods.module_eval("def #{attr_name}; @attributes['#{attr_name}']; end", __FILE__, __LINE__)
+    end
+
+    def type_cast(attr_name, value)
+      return value unless value.is_a?(String)
+      value.send("to_#{model_attributes[attr_name.to_sym]}") rescue nil
+    end
+  end
+
+  def initialize(attributes = nil)
+    @attributes = self.class.model_attributes.inject({}) do |hash, column|
+      hash[column.to_s] = nil
+      hash
+    end
+    self.attributes = attributes unless attributes.nil?
+  end
+
+  def attributes
+    @attributes.keys
+  end
+
+  def attributes=(new_attributes={})
+    new_attributes.each do |key, value|
+      send "#{key}=", value
+    end
+  end
+
+  def method_missing(method_id, *args, &block)
+    if !self.class.attribute_methods_generated?
+      self.class.define_attribute_methods self.class.model_attributes.keys.map(&:to_s)
+      method_name = method_id.to_s
+      send(method_id, *args, &block)
+    else
+      super
+    end
+  end
+
+end
+