nixosTests.bcache: init

nixos/tests/all-tests.nix

@@ -244,6 +244,7 @@ in
   ayatana-indicators = runTest ./ayatana-indicators.nix;
   babeld = runTest ./babeld.nix;
   bazarr = runTest ./bazarr.nix;
+  bcache = runTestOn [ "x86_64-linux" "aarch64-linux" ] ./bcache.nix;
   bcachefs = runTestOn [ "x86_64-linux" "aarch64-linux" ] ./bcachefs.nix;
   beanstalkd = runTest ./beanstalkd.nix;
   bees = runTest ./bees.nix;

nixos/tests/bcache.nix

@@ -0,0 +1,40 @@
+{ pkgs, ... }:
+{
+  name = "bcache";
+  meta.maintainers = with pkgs.lib.maintainers; [ pineapplehunter ];
+
+  nodes.machine =
+    { pkgs, ... }:
+    {
+      virtualisation.emptyDiskImages = [ 4096 ];
+      networking.hostId = "deadbeef";
+      boot.supportedFilesystems = [ "ext4" ];
+      environment.systemPackages = [ pkgs.parted ];
+    };
+
+  testScript = ''
+    machine.succeed("modprobe bcache")
+    machine.succeed("bcache version")
+    machine.succeed("ls /dev")
+
+    machine.succeed(
+        "mkdir /tmp/mnt",
+        "udevadm settle",
+        "parted --script /dev/vdb mklabel gpt",
+        "parted --script /dev/vdb mkpart primary 0% 50% mkpart primary 50% 100%",
+        "udevadm settle",
+        "bcache make -C /dev/vdb1",
+        "bcache make -B /dev/vdb2",
+        "udevadm settle",
+        "bcache attach /dev/vdb1 /dev/vdb2",
+        "bcache set-cachemode /dev/vdb2 writeback",
+        "udevadm settle",
+        "bcache show",
+        "ls /sys/fs/bcache",
+        "mkfs.ext4 /dev/bcache0",
+        "mount /dev/bcache0 /tmp/mnt",
+        "umount /tmp/mnt",
+        "udevadm settle",
+    )
+  '';
+}

pkgs/by-name/bc/bcache-tools/package.nix

@@ -6,6 +6,7 @@
   util-linux,
   bash,
   udevCheckHook,
+  nixosTests,
 }:
 
 stdenv.mkDerivation rec {
@@ -51,6 +52,10 @@ stdenv.mkDerivation rec {
     mkdir -p "$out/sbin" "$out/lib/udev/rules.d" "$out/share/man/man8"
   '';
 
+  passthru.tests = {
+    inherit (nixosTests) bcache;
+  };
+
   meta = {
     description = "User-space tools required for bcache (Linux block layer cache)";
     longDescription = ''