Match descendants only

Selectors like '.foo div' should not match on '<div className="foo" />'

Author: ReactiveRaven

packages/enzyme/src/selectors.js

@@ -317,7 +317,7 @@ function matchDirectChild(nodes, predicate) {
 function matchDescendant(nodes, predicate) {
   return uniqueReduce(
     (matches, node) => matches.concat(treeFilter(node, predicate)),
-    nodes,
+    flatten(nodes.map(childrenOfNode)),
   );
 }