From ef5202d8a86b6772d4fa8dcb6c9ae48dca6f9261 Mon Sep 17 00:00:00 2001
From: Kiara Grouwstra <kiara@procolix.eu>
Date: Mon, 10 Nov 2025 14:07:49 +0100
Subject: [PATCH] test utils (#581)

Reviewed-on: https://git.fediversity.eu/fediversity/fediversity/pulls/581
---
 .forgejo/workflows/ci.yaml |  6 +++
 deployment/utils-test.nix  | 89 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 95 insertions(+)
 create mode 100644 deployment/utils-test.nix

diff --git a/.forgejo/workflows/ci.yaml b/.forgejo/workflows/ci.yaml
index 9046ae7d..6f06d5ab 100644
--- a/.forgejo/workflows/ci.yaml
+++ b/.forgejo/workflows/ci.yaml
@@ -14,6 +14,12 @@ concurrency:
   group: ${{ forgejo.workflow }}-${{ forgejo.event.pull_request.number || forgejo.ref }}
 
 jobs:
+  check-utils:
+    runs-on: native
+    steps:
+      - uses: actions/checkout@v4
+      - run: nix-shell --run 'nix-unit ./deployment/utils-test.nix'
+
   check-function:
     runs-on: native
     steps:
diff --git a/deployment/utils-test.nix b/deployment/utils-test.nix
new file mode 100644
index 00000000..4d66d200
--- /dev/null
+++ b/deployment/utils-test.nix
@@ -0,0 +1,89 @@
+let
+  inherit (import ../default.nix { }) pkgs;
+  inherit (pkgs.callPackage ./utils.nix { })
+    mapKeys
+    evalOption
+    toBash
+    withPackages
+    filterNull
+    withEnv
+    ;
+  inherit (pkgs) lib;
+  inherit (lib) mkOption types;
+  inherit (types) submodule;
+in
+{
+  _class = "nix-unit";
+
+  test-mapKeys = {
+    expr = mapKeys (k: "${k}${k}") { a = 1; };
+    expected = {
+      aa = 1;
+    };
+  };
+
+  test-evalOption = {
+    expr = evalOption (mkOption {
+      type = submodule {
+        options = {
+          a = mkOption { default = 3; };
+        };
+      };
+    }) { };
+    expected = {
+      a = 3;
+    };
+  };
+
+  test-toBash-int = {
+    expr = toBash 1;
+    expected = "1";
+  };
+
+  test-toBash-null = {
+    expr = toBash null;
+    expected = "";
+  };
+
+  test-toBash-attrs = {
+    expr = toBash { a = 1; };
+    expected = ''{\"a\":1}'';
+  };
+
+  test-toBash-str = {
+    expr = toBash "'b\"";
+    expected = "'b\\\"";
+  };
+
+  test-withPackages = {
+    expr = withPackages [ pkgs.hello ];
+    expected = {
+      makeWrapperArgs = [
+        "--prefix"
+        "PATH"
+        ":"
+        "${lib.makeBinPath [ pkgs.hello ]}"
+      ];
+    };
+  };
+
+  test-filterNull = {
+    expr = filterNull {
+      a = 4;
+      b = null;
+    };
+    expected = {
+      a = 4;
+    };
+  };
+
+  test-withEnv = {
+    expr = withEnv {
+      a = 1;
+      b = null;
+      c = "'d\"";
+      e.f = [ "g" ];
+    };
+    expected = ''a="1" b="" c="'d\"" e="{\"f\":[\"g\"]}"'';
+  };
+}