From ea6f2bd8d72e292d7337dabe6ae9bbc899d60eb9 Mon Sep 17 00:00:00 2001
From: "Zaiming (Stone) Shi" <zmstone@gmail.com>
Date: Mon, 3 Oct 2022 22:01:52 +0200
Subject: [PATCH] test: allow starting ct-slave without join cluster

This is to test/inspect states before/after join
---
 test/emqx_node_helpers.erl | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/test/emqx_node_helpers.erl b/test/emqx_node_helpers.erl
index f7c048d51..ad530b3d7 100644
--- a/test/emqx_node_helpers.erl
+++ b/test/emqx_node_helpers.erl
@@ -18,6 +18,7 @@
 
 -include_lib("eunit/include/eunit.hrl").
 
+%% modules is included because code is called before cluster join
 -define(SLAVE_START_APPS, [emqx, emqx_modules]).
 
 -export([start_slave/1,
@@ -94,7 +95,12 @@ setup_node(Node, #{} = Opts) ->
     [ok = rpc:call(Node, application, load, [App]) || App <- [gen_rpc, emqx]],
     ok = rpc:call(Node, emqx_ct_helpers, start_apps, [StartApps, EnvHandler]),
 
-    ok = rpc:call(Node, ekka, join, [node()]),
+    case maps:get(no_join, Opts, false) of
+        true ->
+            ok;
+        false ->
+            ok = rpc:call(Node, ekka, join, [node()])
+    end,
 
     %% Sanity check. Assert that `gen_rpc' is set up correctly:
     ?assertEqual( Node