dalekjs cannot detect d3 svg element

[fusionchen]

when I attempt to use the Dalekjs to test d3.js SVG tree, I found that Dalekjs cannot locate the elements like: circle,rect, but it can find text DOM element. Can anyone kindle help to solve this issue?
Example:

<g>
<circle></circle>  // cannot locate
<text></text>   //located
<rect></rect> // cannot locate
</g>