This tests setting the value of an attribute node after caching childNodes of the attribute node.
The cache should be cleared and childNodes[0].data should return the new value.
You should see PASS below:

PASS nameAttrNode.childNodes.length is 1
PASS nameAttrNode.childNodes[0] is oldValue
PASS nameAttrNode.childNodes[0].data is "oldName"

PASS nameAttrNode.value = 'newName'; nameAttrNode.value is "newName"
PASS nameAttrNode.childNodes[0] is not oldValue
PASS nameAttrNode.childNodes[0].data is "newName"

