flent: convert to unittestCheckHook and add passthru.updateScript (#361633)

pkgs/by-name/fl/flent/package.nix

@@ -4,7 +4,7 @@
   fetchPypi,
   procps,
   qt5,
-  xvfb-run,
+  nix-update-script,
 }:
 python3Packages.buildPythonApplication rec {
   pname = "flent";
@@ -25,28 +25,15 @@ python3Packages.buildPythonApplication rec {
     qtpy
   ];
 
-  nativeCheckInputs = [
-    python3Packages.mock
-    xvfb-run
-  ];
-
-  checkPhase = ''
-    runHook preCheck
+  nativeCheckInputs = [ python3Packages.unittestCheckHook ];
 
+  preCheck = ''
     # we want the gui tests to always run
     sed -i 's|self.skip|pass; #&|' unittests/test_gui.py
 
-    export XDG_RUNTIME_DIR=$(mktemp -d)
-    export HOME=$(mktemp -d)
-    cat >test-runner <<EOF
-    #!/bin/sh
-    ${python3Packages.python.interpreter} -m unittest discover
-    EOF
-    chmod +x test-runner
-    wrapQtApp test-runner --prefix PYTHONPATH : $PYTHONPATH
-    xvfb-run -s '-screen 0 800x600x24' ./test-runner
-
-    runHook postCheck
+    # Dummy qt setup for gui tests
+    export QT_PLUGIN_PATH="${qt5.qtbase.bin}/${qt5.qtbase.qtPluginPrefix}"
+    export QT_QPA_PLATFORM=offscreen
   '';
 
   preFixup = ''
@@ -56,11 +43,13 @@ python3Packages.buildPythonApplication rec {
     )
   '';
 
+  passthru.updateScript = nix-update-script { };
   meta = {
     description = "FLExible Network Tester";
     homepage = "https://flent.org";
     license = lib.licenses.gpl3;
     maintainers = with lib.maintainers; [ mmlb ];
     mainProgram = "flent";
+    badPlatforms = lib.platforms.darwin;
   };
 }