Add recursive ls

Change-Id: Ifab8c9577c01cf7a96cda8d79fe232b12b5538bd
diff --git a/tests/yang.cpp b/tests/yang.cpp
index 09bef03..6f63bfc 100644
--- a/tests/yang.cpp
+++ b/tests/yang.cpp
@@ -288,7 +288,7 @@
                 set = {"example-schema:a2", "example-schema:leafa"};
             }
 
-            REQUIRE(ys.childNodes(path) == set);
+            REQUIRE(ys.childNodes(path, Recursion::NonRecursive) == set);
         }
     }