nixos/tests/speechd: init (#563434)

nixos/tests/all-tests.nix

@@ -1726,6 +1726,7 @@ in
   sonic-server = runTest ./sonic-server.nix;
   spacecookie = runTest ./spacecookie.nix;
   spark = handleTestOn [ "x86_64-linux" "aarch64-linux" ] ./spark { };
+  speechd = runTest ./speechd.nix;
   speedtest-tracker = runTest ./speedtest-tracker.nix;
   spiped = runTest ./spiped.nix;
   spire = runTest ./spire.nix;

nixos/tests/speechd.nix

@@ -0,0 +1,49 @@
+{ lib, ... }:
+{
+  name = "speechd";
+  meta.maintainers = [ lib.maintainers.h7x4 ];
+
+  nodes.machine =
+    { pkgs, ... }:
+    {
+      imports = [ ./common/user-account.nix ];
+
+      environment.systemPackages = [ pkgs.speechd ];
+
+      # Without a real sound card, libao (speech-dispatcher's audio backend)
+      # fails to open any device. libao's built-in "null" driver always succeeds.
+      environment.etc."libao.conf".text = ''
+        default_driver=null
+      '';
+
+      services.speechd = {
+        enable = true;
+        config = ''
+          AddModule "testmodule" "sd_generic" "testmodule.conf"
+          DefaultModule "testmodule"
+        '';
+        modules.testmodule = ''
+          AddVoice "en" "male1" "testmodule_voice"
+          GenericLanguage "en" "en"
+          GenericExecuteSynth "echo \'$DATA\' >> /tmp/speechd-spoken.txt"
+        '';
+      };
+    };
+
+  testScript =
+    { nodes, ... }:
+    let
+      user = nodes.machine.users.users.alice;
+      uid = toString user.uid;
+      aliceRun = command: "su - ${user.name} -c 'XDG_RUNTIME_DIR=/run/user/${uid} ${command}'";
+    in
+    ''
+      machine.wait_for_unit("multi-user.target")
+      machine.succeed("loginctl enable-linger ${user.name}")
+      machine.wait_for_unit("user@${uid}.service")
+      machine.wait_for_unit("speech-dispatcher.socket", "${user.name}")
+
+      machine.succeed("${aliceRun "spd-say 'hello'"}")
+      machine.wait_until_succeeds("grep -q 'hello' /tmp/speechd-spoken.txt")
+    '';
+}

pkgs/by-name/sp/speechd/package.nix

@@ -33,6 +33,7 @@
   withPico ? true,
   picotts,
   libsOnly ? false,
+  nixosTests,
 }:
 
 let
@@ -152,6 +153,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   enableParallelBuilding = true;
 
+  passthru.tests.nixos = nixosTests.speechd;
+
   meta = {
     description =
       "Common interface to speech synthesis" + lib.optionalString libsOnly " - client libraries only";