[ONOS-3898/4069] Yang Utils Extension to support RPC/Notification/Choice/Case/Union

Change-Id: I405852caff3464719e8e586fa8e9ae9b6ed043ff
diff --git a/utils/yangutils/src/test/resources/CaseStatement.yang b/utils/yangutils/src/test/resources/CaseStatement.yang
new file mode 100644
index 0000000..bb3f6c9
--- /dev/null
+++ b/utils/yangutils/src/test/resources/CaseStatement.yang
@@ -0,0 +1,26 @@
+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+     container food {
+       choice snack {
+           case sports-arena {
+               leaf pretzel {
+                   type empty;
+               }
+               leaf beer {
+                   type empty;
+               }
+           }
+           case late-night {
+               leaf chocolate {
+                   type enumeration {
+                       enum dark;
+                       enum milk;
+                       enum first-available;
+                   }
+               }
+           }
+       }
+    }
+}