Commit 37fa83f

@@ -3,6 +3,10 @@ describe Scale::Node do
     include Scale::Node
     attribute :x, Integer
     attribute :y, Integer
+
+    def xml_tag
+      :fake
+    end
   end
 
   subject { FakeNode.new }
@@ -20,4 +24,23 @@ describe Scale::Node do
       expect(subject).to include(child)
     end
   end
+
+  describe "#to_xml" do
+    it 'generates the full xml tree' do
+      grandchild = Scale::Rectangle.new(width: "100%", height: "100%", fill: "blue")
+      child = Scale::Rectangle.new(width: "100%", height: "100%", fill: "red")
+      child.add(grandchild)
+      subject.add(child)
+
+      expected = <<-XML
+<?xml version="1.0"?>
+<fake>
+  <rect width="100%" height="100%" fill="red">
+    <rect width="100%" height="100%" fill="blue"/>
+  </rect>
+</fake>
+      XML
+      expect(subject.to_xml).to eql(expected)
+    end
+  end
 end