Add jest specs

Author: GilbertCherrie

app/javascript/components/vm-snapshot-tree-select/snapshot-tree.jsx

@@ -73,6 +73,7 @@ const convertData = (node) => {
 };
 
 const SnapshotTree = ({ nodes, setSnapshot }) => {
+  console.log(nodes);
   const [selectedNode, setSelectedNode] = useState('');
 
   const data = {