feature: added the --- reload_fails new section to skip checking config_version after HUP reload in the HUp reload testing mode.

We need this to test failures in init_by_lua*.

Author: doujiang24

lib/Test/Nginx/Socket.pm

@@ -3316,6 +3316,12 @@ Below is an example from ngx_headers_more module's test suite:
 
 Do not attempt to parse the response or run the response related subtests.
 
+=head2 reload_fails
+
+Allows the NGINX HUP reload fails, which means that the server will still use the previous test block's nginx configuration.
+
+This only makes sense in the HUP reload testing mode.
+
 =head2 user_files
 
 With this section you can create a file that will be copied in the

lib/Test/Nginx/Util.pm

@@ -1517,7 +1517,12 @@ sub run_test ($) {
                                 warn "$name\n";
                             }
 
-                            test_config_version($name);
+                            if (defined $block->reload_fails) {
+                                sleep 0.1;
+
+                            } else {
+                                test_config_version($name);
+                            }
 
                             goto request;