From e7808666ea6abbe5fb9037d72710df77b1be6b01 Mon Sep 17 00:00:00 2001
From: Luflosi <luflosi@luflosi.de>
Date: Mon, 1 Jul 2024 21:42:50 +0200
Subject: [PATCH] nixos/tests/darling-dmg: init

---
 nixos/tests/all-tests.nix                     |  1 +
 nixos/tests/darling-dmg.nix                   | 34 +++++++++++++++++++
 .../tools/filesystems/darling-dmg/default.nix |  8 ++++-
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 nixos/tests/darling-dmg.nix

diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index d16b747bfa95..93391ee3d43a 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -240,6 +240,7 @@ in {
   custom-ca = handleTest ./custom-ca.nix {};
   croc = handleTest ./croc.nix {};
   darling = handleTest ./darling.nix {};
+  darling-dmg = runTest ./darling-dmg.nix;
   dae = handleTest ./dae.nix {};
   davis = handleTest ./davis.nix {};
   db-rest = handleTest ./db-rest.nix {};
diff --git a/nixos/tests/darling-dmg.nix b/nixos/tests/darling-dmg.nix
new file mode 100644
index 000000000000..0a2ec8298122
--- /dev/null
+++ b/nixos/tests/darling-dmg.nix
@@ -0,0 +1,34 @@
+{ lib, pkgs, ... }:
+# This needs to be a VM test because the FUSE kernel module can't be used inside of a derivation in the Nix sandbox.
+# This test also exercises the LZFSE support in darling-dmg.
+let
+  # The last kitty release which is stored on an HFS+ filesystem inside the disk image
+  test-dmg-file = pkgs.fetchurl {
+    url = "https://github.com/kovidgoyal/kitty/releases/download/v0.17.4/kitty-0.17.4.dmg";
+    hash = "sha256-m+c5s8fFrgUc0xQNI196WplYBZq9+lNgems5haZUdvA=";
+  };
+in
+{
+  name = "darling-dmg";
+  meta.maintainers = with lib.maintainers; [ Luflosi ];
+
+  nodes.machine = {};
+
+  testScript = ''
+    start_all()
+
+    machine.succeed("mkdir mount-point")
+    machine.succeed("'${pkgs.darling-dmg}/bin/darling-dmg' '${test-dmg-file}' mount-point")
+
+    # Crude way to verify the contents
+    # Taken from https://stackoverflow.com/questions/545387/linux-compute-a-single-hash-for-a-given-folder-contents
+    # This could be improved. It does not check symlinks for example.
+    hash = machine.succeed("""
+      (find mount-point -type f -print0  | sort -z | xargs -0 sha256sum; \
+       find mount-point \( -type f -o -type d \) -print0 | sort -z | \
+         xargs -0 stat -c '%n %a') \
+      | sha256sum
+    """).strip()
+    assert hash == "00e61c2ef171093fbf194e420c17bb84bcdb823238d70eb46e375bab2427cc21  -", f"The disk image contents differ from what was expected (was {hash})"
+  '';
+}
diff --git a/pkgs/tools/filesystems/darling-dmg/default.nix b/pkgs/tools/filesystems/darling-dmg/default.nix
index 8884ef2f63d5..916b2db3b64e 100644
--- a/pkgs/tools/filesystems/darling-dmg/default.nix
+++ b/pkgs/tools/filesystems/darling-dmg/default.nix
@@ -1,4 +1,6 @@
-{ lib, stdenv, fetchFromGitHub, cmake, fuse, zlib, bzip2, openssl, libxml2, icu, lzfse, libiconv }:
+{ lib, stdenv, fetchFromGitHub, cmake, fuse, zlib, bzip2, openssl, libxml2, icu, lzfse, libiconv
+, nixosTests
+}:
 
 stdenv.mkDerivation rec {
   pname = "darling-dmg";
@@ -20,6 +22,10 @@ stdenv.mkDerivation rec {
     "-llzfse"
   ];
 
+  passthru.tests = {
+    inherit (nixosTests) darling-dmg;
+  };
+
   meta = with lib; {
     homepage = "https://www.darlinghq.org/";
     description = "Darling lets you open macOS dmgs on Linux";