From 373e7b33f93b1ad0a4f4acb51f18e13838da54bc Mon Sep 17 00:00:00 2001
From: "Zaiming (Stone) Shi" <zmstone@gmail.com>
Date: Sun, 9 Apr 2023 23:40:49 +0200
Subject: [PATCH] test: allow tests to run without desc cache

---
 apps/emqx_dashboard/src/emqx_dashboard_desc_cache.erl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/apps/emqx_dashboard/src/emqx_dashboard_desc_cache.erl b/apps/emqx_dashboard/src/emqx_dashboard_desc_cache.erl
index 8fd6fe3d3..9d8d1905d 100644
--- a/apps/emqx_dashboard/src/emqx_dashboard_desc_cache.erl
+++ b/apps/emqx_dashboard/src/emqx_dashboard_desc_cache.erl
@@ -60,7 +60,7 @@ lookup(Lang, Namespace, Id, Tag) ->
 %% @doc Lookup the description of the configuration item from the given cache.
 lookup(EtsTab, Lang0, Namespace, Id, Tag) ->
     Lang = bin(Lang0),
-    case ets:lookup(EtsTab, {Lang, bin(Namespace), bin(Id), bin(Tag)}) of
+    try ets:lookup(EtsTab, {Lang, bin(Namespace), bin(Id), bin(Tag)}) of
         [{_, Desc}] ->
             Desc;
         [] when Lang =/= <<"en">> ->
@@ -69,6 +69,11 @@ lookup(EtsTab, Lang0, Namespace, Id, Tag) ->
         _ ->
             %% undefined but not <<>>
             undefined
+    catch
+        error:badarg ->
+            %% schema is not initialized
+            %% most likely in test cases
+            undefined
     end.
 
 %% The desc files are of names like: