Allow nested CachedRenders

opal/clearwater/cached_render.rb

@@ -11,7 +11,13 @@ def self.included base
           if(prev && prev.vnode && #{!should_render?(`prev`)}) {
             return prev.vnode;
           } else {
-            return #{Component.sanitize_content(render)};
+            var content = #{Component.sanitize_content(render)};
+
+            while(content && content.type == 'Thunk' && content.render) {
+              content = #{Component.sanitize_content(`content.render(prev)`)};
+            }
+
+            return content;
           }
         });
       }

spec/clearwater/cached_render_spec.rb

@@ -42,5 +42,27 @@ def component.should_render?
 
       2.times { `component.render(component)` }
     end
+
+    it 'allows nested CachedRender renders' do
+      foo = Class.new do
+        include Clearwater::Component
+        include Clearwater::CachedRender
+
+        def render
+          'hi'
+        end
+      end
+
+      bar = Class.new do
+        include Clearwater::Component
+        include Clearwater::CachedRender
+
+        define_method :render do
+          foo.new
+        end
+      end.new
+
+      expect(`bar.render()`).to eq 'hi'
+    end
   end
 end