Add parser support for YANG actions

Change-Id: I9e96ae15cee3f990dfa5ec3fac433faf71348e11
diff --git a/tests/command_completion.cpp b/tests/command_completion.cpp
index 49017b0..2fedb78 100644
--- a/tests/command_completion.cpp
+++ b/tests/command_completion.cpp
@@ -21,7 +21,7 @@
     int expectedContextLength;
     SECTION("no prefix")
     {
-        expectedCompletions = {"cd", "copy", "create", "delete", "set", "commit", "get", "ls", "discard", "help", "describe", "move", "dump", "rpc", "exec", "cancel"};
+        expectedCompletions = {"cd", "copy", "create", "delete", "set", "commit", "get", "ls", "discard", "help", "describe", "move", "dump", "prepare", "exec", "cancel"};
         expectedContextLength = 0;
         SECTION("no space") {
             input = "";