From a299fc23515d50d8161027af87b649eca27662d8 Mon Sep 17 00:00:00 2001
From: Florian Klink <flokli@flokli.de>
Date: Thu, 15 Oct 2020 00:24:39 +0200
Subject: [PATCH] nixosTests.cloud-init: test changing hostname actually works

---
 nixos/tests/cloud-init.nix | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/nixos/tests/cloud-init.nix b/nixos/tests/cloud-init.nix
index d23e9c64b373..a127be6dd85f 100644
--- a/nixos/tests/cloud-init.nix
+++ b/nixos/tests/cloud-init.nix
@@ -48,7 +48,7 @@ in makeTest {
     virtualisation.qemu.options = [ "-cdrom" "${metadataDrive}/metadata.iso" ];
     services.cloud-init.enable = true;
     services.openssh.enable = true;
-
+    networking.hostName = "";
   };
   testScript = ''
     machine.wait_for_unit("cloud-init.service")
@@ -70,5 +70,13 @@ in makeTest {
     machine.succeed(
         "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o IdentityFile=~/.ssh/id_snakeoil nixos@localhost 'true'"
     )
+
+    # test changing hostname via cloud-init worked
+    assert (
+        machine.succeed(
+            "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o IdentityFile=~/.ssh/id_snakeoil nixos@localhost 'hostname'"
+        ).strip()
+        == "test"
+    )
   '';
 }