nixos/tests: add unit-php test

nixos/tests/all-tests.nix

@@ -321,6 +321,7 @@ in
   trickster = handleTest ./trickster.nix {};
   tuptime = handleTest ./tuptime.nix {};
   udisks2 = handleTest ./udisks2.nix {};
+  unit-php = handleTest ./web-servers/unit-php.nix {};
   upnp = handleTest ./upnp.nix {};
   uwsgi = handleTest ./uwsgi.nix {};
   vault = handleTest ./vault.nix {};

nixos/tests/web-servers/unit-php.nix

@@ -0,0 +1,47 @@
+import ../make-test-python.nix ({pkgs, ...}:
+ let
+    testdir = pkgs.writeTextDir "www/info.php" "<?php phpinfo();";
+
+in {
+  name = "unit-php-test";
+  meta.maintainers = with pkgs.stdenv.lib.maintainers; [ izorkin ];
+
+  machine = { config, lib, pkgs, ... }: {
+    services.unit = {
+      enable = true;
+      config = ''
+        {
+          "listeners": {
+            "*:9074": {
+              "application": "php_74"
+            }
+          },
+          "applications": {
+            "php_74": {
+              "type": "php 7.4",
+              "processes": 1,
+              "user": "testuser",
+              "group": "testgroup",
+              "root": "${testdir}/www",
+              "index": "info.php"
+            }
+          }
+        }
+      '';
+    };
+    users = {
+      users.testuser = {
+        isNormalUser = false;
+        uid = 1074;
+        group = "testgroup";
+      };
+      groups.testgroup = {
+        gid= 1074;
+      };
+    };
+  };
+  testScript = ''
+    machine.wait_for_unit("unit.service")
+    assert "PHP Version ${pkgs.php74.version}" in machine.succeed("curl -vvv -s http://127.0.0.1:9074/")
+  '';
+})

pkgs/servers/http/unit/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub, which
+{ stdenv, fetchFromGitHub, nixosTests, which
 , withPython2 ? false, python2
 , withPython3 ? true, python3, ncurses
 , withPHP72 ? false, php72
@@ -81,6 +81,8 @@ in stdenv.mkDerivation rec {
     ${optionalString withRuby_2_7   "./configure ruby   --module=ruby27   --ruby=${ruby_2_7}/bin/ruby"}
   '';
 
+  passthru.tests.unit-php = nixosTests.unit-php;
+
   meta = {
     description = "Dynamic web and application server, designed to run applications in multiple languages.";
     homepage    = "https://unit.nginx.org/";