staticjinja: add minimal template test

pkgs/development/python-modules/staticjinja/default.nix

···
 , testVersion
 , tomlkit
 , staticjinja
+, callPackage
 }:
 
 buildPythonPackage rec {
···
     export PATH="$PATH:$out/bin";
   '';
 
-  passthru.tests.version = testVersion {
-    package = staticjinja;
+  passthru.tests = {
+    version = testVersion { package = staticjinja; };
+    minimal-template = callPackage ./test-minimal-template {};
   };
 
   meta = with lib; {

pkgs/development/python-modules/staticjinja/test-minimal-template/default.nix

···
+{ stdenv, staticjinja }:
+
+stdenv.mkDerivation {
+  name = "staticjinja-test-minimal-template";
+  meta.timeout = 30;
+  buildCommand = ''
+    ${staticjinja}/bin/staticjinja build --srcpath ${./templates}
+    grep 'Hello World!' index
+    touch $out
+  '';
+}

pkgs/development/python-modules/staticjinja/test-minimal-template/templates/include

···
+World

pkgs/development/python-modules/staticjinja/test-minimal-template/templates/index

···
+Hello {% include './include' %}!