From 46156529f2682412b8867f7bc40b32b350a00bd9 Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Mon, 4 Apr 2022 14:08:21 +0200
Subject: [PATCH] tests.pkgs-lib.formats: Allow strings with context in test
 runner

---
 pkgs/pkgs-lib/tests/formats.nix | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkgs/pkgs-lib/tests/formats.nix b/pkgs/pkgs-lib/tests/formats.nix
index 99b88d36ec3c..25327acfe7a4 100644
--- a/pkgs/pkgs-lib/tests/formats.nix
+++ b/pkgs/pkgs-lib/tests/formats.nix
@@ -18,8 +18,11 @@ let
       }) [ def ]);
     in formatSet.generate "test-format-file" config;
 
-  runBuildTest = name: { drv, expected }: pkgs.runCommand name {} ''
-    if diff -u '${builtins.toFile "expected" expected}' '${drv}'; then
+  runBuildTest = name: { drv, expected }: pkgs.runCommand name {
+    passAsFile = ["expected"];
+    inherit expected drv;
+  } ''
+    if diff -u "$expectedPath" "$drv"; then
       touch "$out"
     else
       echo