nixos/php: Move the pcre tests to the php test attribute

nixos/tests/php/default.nix

@@ -3,4 +3,5 @@
   pkgs ? import ../../.. { inherit system config; }
 }: {
   fpm = import ./fpm.nix { inherit system pkgs; };
+  pcre = import ./pcre.nix { inherit system pkgs; };
 }

nixos/tests/php/pcre.nix

@@ -0,0 +1,37 @@
+let
+  testString = "can-use-subgroups";
+in import ../make-test-python.nix ({ ...}: {
+  name = "php-httpd-pcre-jit-test";
+  machine = { lib, pkgs, ... }: {
+    time.timeZone = "UTC";
+    services.httpd = {
+      enable = true;
+      adminAddr = "please@dont.contact";
+      enablePHP = true;
+      phpOptions = "pcre.jit = true";
+      extraConfig = let
+        testRoot = pkgs.writeText "index.php"
+          ''
+            <?php
+            preg_match('/(${testString})/', '${testString}', $result);
+            var_dump($result);
+          '';
+      in
+        ''
+          Alias / ${testRoot}/
+
+          <Directory ${testRoot}>
+            Require all granted
+          </Directory>
+        '';
+    };
+  };
+  testScript = { ... }:
+    ''
+      machine.wait_for_unit("httpd.service")
+      # Ensure php evaluation by matching on the var_dump syntax
+      assert 'string(${toString (builtins.stringLength testString)}) "${testString}"' in machine.succeed(
+          "curl -vvv -s http://127.0.0.1:80/index.php"
+      )
+    '';
+})