From fd49155848a8ee8aa2f103fe765ddb9aed1b3d2d Mon Sep 17 00:00:00 2001
From: Florian Klink <flokli@flokli.de>
Date: Mon, 18 May 2020 11:16:56 +0200
Subject: [PATCH] nixosTests.systemd-binfmt: init

This adds a simple test running GNU Hello cross-compiled for armv7l and
aarch64 inside a x86_64 VM with configured binfmt.

We already build the cross toolchains in other invocations, and building
hello itself is small.
---
 nixos/tests/all-tests.nix      |  1 +
 nixos/tests/systemd-binfmt.nix | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 nixos/tests/systemd-binfmt.nix

diff --git a/nixos/tests/all-tests.nix b/nixos/tests/all-tests.nix
index 525e97c039e..0acded892c7 100644
--- a/nixos/tests/all-tests.nix
+++ b/nixos/tests/all-tests.nix
@@ -304,6 +304,7 @@ in
   syncthing-relay = handleTest ./syncthing-relay.nix {};
   systemd = handleTest ./systemd.nix {};
   systemd-analyze = handleTest ./systemd-analyze.nix {};
+  systemd-binfmt = handleTestOn ["x86_64-linux"] ./systemd-binfmt.nix {};
   systemd-boot = handleTestOn ["x86_64-linux"] ./systemd-boot.nix {};
   systemd-confinement = handleTest ./systemd-confinement.nix {};
   systemd-timesyncd = handleTest ./systemd-timesyncd.nix {};
diff --git a/nixos/tests/systemd-binfmt.nix b/nixos/tests/systemd-binfmt.nix
new file mode 100644
index 00000000000..2a676f3da98
--- /dev/null
+++ b/nixos/tests/systemd-binfmt.nix
@@ -0,0 +1,24 @@
+# Teach the kernel how to run armv7l and aarch64-linux binaries,
+# and run GNU Hello for these architectures.
+import ./make-test-python.nix ({ pkgs, ... }: {
+  name = "systemd-binfmt";
+  machine = {
+    boot.binfmt.emulatedSystems = [
+      "armv7l-linux"
+      "aarch64-linux"
+    ];
+  };
+
+  testScript = let
+    helloArmv7l = pkgs.pkgsCross.armv7l-hf-multiplatform.hello;
+    helloAarch64 = pkgs.pkgsCross.aarch64-multiplatform.hello;
+  in ''
+    machine.start()
+    assert "world" in machine.succeed(
+        "${helloArmv7l}/bin/hello"
+    )
+    assert "world" in machine.succeed(
+        "${helloAarch64}/bin/hello"
+    )
+  '';
+})