Fix new subscribe mode test in reply-schemas-validator (#11939)

The reason is in reply-schemas-validator, the resp of the
client we create will be client_default_resp (currently 3):
```
client *createClient(connection *conn) {
    client *c = zmalloc(sizeof(client));
 #ifdef LOG_REQ_RES
    reqresReset(c, 0);
    c->resp = server.client_default_resp;
 #else
    c->resp = 2;
 #endif
}
```

But current_resp3 in redis-cli will be inconsistent with it,
the test adds a simple hello 3 to avoid this failure, test
was added in #11873.

Added help descriptions for dont-pre-clean option, it was
added in #10273

2 files changed, 7 insertions, 0 deletions

diff --git a/tests/integration/redis-cli.tcl b/tests/integration/redis-cli.tcl
index 50f4a2e83..2c39d720a 100644
--- a/tests/integration/redis-cli.tcl
+++ b/tests/integration/redis-cli.tcl
@@ -194,6 +194,10 @@ start_server {tags {"cli"}} {
     }
 
     test_interactive_cli "Subscribed mode" {
+        if {$::force_resp3} {
+            run_command $fd "hello 3"
+        }
+
         set reading "Reading messages... (press Ctrl-C to quit or any key to type command)\r"
         set erase "\033\[K"; # Erases the "Reading messages..." line.
 
@@ -215,6 +219,8 @@ start_server {tags {"cli"}} {
         assert_equal $erase$unsub1$unsub2$reading \
             [run_command $fd "unsubscribe ch1 ch2"]
 
+        run_command $fd "hello 2"
+
         # Command forbidden in subscribed mode (RESP2).
         set err "(error) ERR Can't execute 'get': only (P|S)SUBSCRIBE / (P|S)UNSUBSCRIBE / PING / QUIT / RESET are allowed in this context\n"
         assert_equal $erase$err$reading [run_command $fd "get k"]
diff --git a/tests/test_helper.tcl b/tests/test_helper.tcl
index 807995593..922cb438d 100644
--- a/tests/test_helper.tcl
+++ b/tests/test_helper.tcl
@@ -616,6 +616,7 @@ proc print_help_screen {} {
         "--skiptest <test>  Test name or regexp pattern (if <test> starts with '/') to skip. This option can be repeated."
         "--tags <tags>      Run only tests having specified tags or not having '-' prefixed tags."
         "--dont-clean       Don't delete redis log files after the run."
+        "--dont-pre-clean   Don't delete existing redis log files before the run."
         "--no-latency       Skip latency measurements and validation by some tests."
         "--stop             Blocks once the first test fails."
         "--loop             Execute the specified set of tests forever."