1 files changed, 28 insertions, 0 deletions
diff --git a/tests/functional/plugins/plugintest.cc b/tests/functional/plugins/plugintest.cc
new file mode 100644
index 000000000..e02fd68d5
--- /dev/null
+++ b/tests/functional/plugins/plugintest.cc
@@ -0,0 +1,28 @@
+#include "config.hh"
+#include "primops.hh"
+
+using namespace nix;
+
+struct MySettings : Config
+{
+    Setting<bool> settingSet{this, false, "setting-set",
+        "Whether the plugin-defined setting was set"};
+};
+
+MySettings mySettings;
+
+static GlobalConfig::Register rs(&mySettings);
+
+static void prim_anotherNull (EvalState & state, const PosIdx pos, Value ** args, Value & v)
+{
+    if (mySettings.settingSet)
+        v.mkNull();
+    else
+        v.mkBool(false);
+}
+
+static RegisterPrimOp rp({
+    .name = "anotherNull",
+    .arity = 0,
+    .fun = prim_anotherNull,
+});