nixos/nginx: add unix-socket default-listen test case

Includes timeout=1 while checking existence of unix socket file paths

Author: Bert-Proesmans

nixos/tests/nginx-unix-socket.nix

@@ -1,5 +1,6 @@
 { ... }:
 let
+  defaultNginxSocketPath = "/var/run/nginx/default-test.sock";
   nginxSocketPath = "/var/run/nginx/test.sock";
 in
 {
@@ -11,6 +12,13 @@ in
       {
         services.nginx = {
           enable = true;
+
+          defaultListen = [ { addr = "unix:${defaultNginxSocketPath}"; } ];
+          virtualHosts.defaultLocalhost = {
+            serverName = "defaultLocalhost";
+            locations."/default".return = "200 'bar'";
+          };
+
           virtualHosts.localhost = {
             serverName = "localhost";
             listen = [ { addr = "unix:${nginxSocketPath}"; } ];
@@ -22,8 +30,10 @@ in
 
   testScript = ''
     webserver.wait_for_unit("nginx")
-    webserver.wait_for_open_unix_socket("${nginxSocketPath}")
+    webserver.wait_for_open_unix_socket("${defaultNginxSocketPath}", timeout=1)
+    webserver.wait_for_open_unix_socket("${nginxSocketPath}", timeout=1)
 
+    webserver.succeed("curl --fail --silent --unix-socket '${defaultNginxSocketPath}' http://defaultLocalhost/default | grep '^bar$'")
     webserver.succeed("curl --fail --silent --unix-socket '${nginxSocketPath}' http://localhost/test | grep '^foo$'")
   '';
 }