From 162b8fba1278900be3ff940a47009e67c00c9969 Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Mon, 3 May 2021 13:33:41 +0200
Subject: [PATCH] testing-python.nix: document runTests pos argument

---
 nixos/lib/testing-python.nix | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/nixos/lib/testing-python.nix b/nixos/lib/testing-python.nix
index cbe90ff4cbf..6497b897eaf 100644
--- a/nixos/lib/testing-python.nix
+++ b/nixos/lib/testing-python.nix
@@ -54,8 +54,13 @@ rec {
     };
 
   # Run an automated test suite in the given virtual network.
-  # `driver' is the script that runs the network.
-  runTests = { driver, pos }:
+  runTests = {
+    # the script that runs the network
+    driver,
+    # a source position in the format of builtins.unsafeGetAttrPos
+    # for meta.position
+    pos,
+  }:
     stdenv.mkDerivation {
       name = "vm-test-run-${driver.testName}";