Test to make sure the model has a name when finalizing it

[#1303 state:resolved]

lib/dm-core.rb

@@ -318,6 +318,10 @@ def self.finalize_model(model)
     repository_name = model.repository_name
     relationships   = model.relationships(repository_name).values
 
+    if name.to_s.strip.empty?
+      raise IncompleteModelError, "#{model.inspect} must have a name"
+    end
+
     if model.properties(repository_name).empty? &&
       !relationships.any? { |relationship| relationship.kind_of?(Associations::ManyToOne::Relationship) }
       raise IncompleteModelError, "#{name} must have at least one property or many to one relationship to be valid"

spec/public/finalize_spec.rb

@@ -14,6 +14,15 @@ class ::ValidObject
       Object.send(:remove_const, :ValidObject)
     end
 
+    it 'should raise on an anonymous model' do
+      model = Class.new do
+        include DataMapper::Resource
+        property :id, Integer, :key => true
+      end
+      method(:subject).should raise_error(DataMapper::IncompleteModelError, "#{model.inspect} must have a name")
+      DataMapper::Model.descendants.delete(model)
+    end
+
     it 'should raise on an empty model' do
       class ::EmptyObject
         include DataMapper::Resource