fixup tests

modules/testing/driver/kubetest.nix

@@ -0,0 +1,58 @@
+{ lib, config, pkgs, ... }:
+
+with lib;
+let
+  testing = config.testing;
+  cfg = testing.driver.kubetest;
+
+  kubetest = import ./kubetestdrv.nix { inherit pkgs; };
+
+  pythonEnv = pkgs.python38.withPackages (ps: with ps; [
+    pytest
+    kubetest
+    kubernetes
+  ] ++ cfg.extraPackages);
+
+  toTestScript = t:
+    if isString t.script
+    then
+      pkgs.writeText "${t.name}.py" ''
+        ${cfg.defaultHeader}
+        ${t.script}
+      ''
+    else t.script;
+
+  tests = pkgs.linkFarm "${testing.name}-tests" (
+    map
+      (t: {
+        path = toTestScript t;
+        name = "${t.name}_test.py";
+      })
+      (filter (t: t.script != null) testing.tests)
+  );
+
+  testScript = pkgs.writeScript "test-${testing.name}.sh" ''
+    #!/usr/bin/env bash
+    ${pythonEnv}/bin/pytest -p no:cacheprovider ${tests} $@
+  '';
+
+in
+{
+  options.testing.driver.kubetest = {
+    defaultHeader = mkOption {
+      type = types.lines;
+      description = "Default test header";
+      default = ''
+        import pytest
+      '';
+    };
+
+    extraPackages = mkOption {
+      type = types.listOf types.package;
+      description = "Extra packages to pass to tests";
+      default = [ ];
+    };
+  };
+
+  config.testing.testScript = testScript;
+}