import ./make-test-python.nix (
  { pkgs, ... }:
  {
    name = "overlayfs";
    meta.maintainers = with pkgs.lib.maintainers; [ bachp ];

    nodes.machine =
      { pkgs, ... }:
      {
        virtualisation.emptyDiskImages = [ 512 ];
        networking.hostId = "deadbeef";
        environment.systemPackages = with pkgs; [ parted ];
      };

    testScript = ''
      machine.succeed("ls /dev")

      machine.succeed("mkdir -p /tmp/mnt")

      # Test ext4 + overlayfs
      machine.succeed(
        'mkfs.ext4 -F -L overlay-ext4 /dev/vdb',
        'mount -t ext4 /dev/vdb /tmp/mnt',
        'mkdir -p /tmp/mnt/upper /tmp/mnt/lower /tmp/mnt/work /tmp/mnt/merged',
        # Setup some existing files
        'echo Replace > /tmp/mnt/lower/replace.txt',
        'echo Append > /tmp/mnt/lower/append.txt',
        'echo Overwrite > /tmp/mnt/lower/overwrite.txt',
        'mount -t overlay overlay -o lowerdir=/tmp/mnt/lower,upperdir=/tmp/mnt/upper,workdir=/tmp/mnt/work /tmp/mnt/merged',
        # Test new
        'echo New > /tmp/mnt/merged/new.txt',
        '[[ "$(cat /tmp/mnt/merged/new.txt)" == New ]]',
        # Test replace
        '[[ "$(cat /tmp/mnt/merged/replace.txt)" == Replace ]]',
        'echo Replaced > /tmp/mnt/merged/replace-tmp.txt',
        'mv /tmp/mnt/merged/replace-tmp.txt /tmp/mnt/merged/replace.txt',
        '[[ "$(cat /tmp/mnt/merged/replace.txt)" == Replaced ]]',
        # Overwrite
        '[[ "$(cat /tmp/mnt/merged/overwrite.txt)" == Overwrite ]]',
        'echo Overwritten > /tmp/mnt/merged/overwrite.txt',
        '[[ "$(cat /tmp/mnt/merged/overwrite.txt)" == Overwritten ]]',
        # Test append
        '[[ "$(cat /tmp/mnt/merged/append.txt)" == Append ]]',
        'echo ed >> /tmp/mnt/merged/append.txt',
        '[[ "$(cat /tmp/mnt/merged/append.txt)" == "Append\ned" ]]',
        'umount /tmp/mnt/merged',
        'umount /tmp/mnt',
        'udevadm settle',
      )
    '';
  }
)