From ffb9b68bd3629d81d082193db000959039347518 Mon Sep 17 00:00:00 2001
From: Luiz Ribeiro <luizribeiro@gmail.com>
Date: Thu, 27 Jul 2023 09:40:16 -0400
Subject: [PATCH] pkgs.format.toml: introduce test for checking semantics

---
 pkgs/pkgs-lib/tests/formats.nix | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/pkgs/pkgs-lib/tests/formats.nix b/pkgs/pkgs-lib/tests/formats.nix
index 80df247f7b6a..b7e958565ca6 100644
--- a/pkgs/pkgs-lib/tests/formats.nix
+++ b/pkgs/pkgs-lib/tests/formats.nix
@@ -219,6 +219,35 @@ in runBuildTests {
     '';
   };
 
+  # see https://github.com/NixOS/nixpkgs/issues/237521 for this particular test
+  testTomlSemantics = {
+    drv = evalFormat formats.toml {} {
+      processors = {
+        override = [
+          { tags = { cluster = "staging"; }; }
+        ];
+        rename = [
+          {
+            replace = [
+              { dest = "ceph_telegraf_check"; measurement = "exec"; }
+            ];
+          }
+        ];
+      };
+    };
+    expected = ''
+      [processors]
+      [[processors.override]]
+      [processors.override.tags]
+      cluster = "staging"
+
+      [[processors.rename]]
+      [[processors.rename.replace]]
+      dest = "ceph_telegraf_check"
+      measurement = "exec"
+    '';
+  };
+
   # This test is responsible for
   #   1. testing type coercions
   #   2. providing a more readable example test