{ system , pkgs ? import ../.. { inherit system config; } # Use a minimal kernel? , minimal ? false # Ignored , config ? { } # !!! See comment about args in lib/modules.nix , specialArgs ? { } # Modules to add to each VM , extraConfigurations ? [ ] }: with pkgs; rec { inherit pkgs; mkTestDriver = let testDriverScript = ./test-driver/test-driver.py; in qemu_pkg: stdenv.mkDerivation { name = "nixos-test-driver"; nativeBuildInputs = [ makeWrapper ]; buildInputs = [ (python3.withPackages (p: [ p.ptpython ])) ]; checkInputs = with python3Packages; [ pylint black mypy ]; dontUnpack = true; preferLocalBuild = true; doCheck = true; checkPhase = '' mypy --disallow-untyped-defs \ --no-implicit-optional \ --ignore-missing-imports ${testDriverScript} pylint --errors-only ${testDriverScript} black --check --diff ${testDriverScript} ''; installPhase = '' mkdir -p $out/bin cp ${testDriverScript} $out/bin/nixos-test-driver chmod u+x $out/bin/nixos-test-driver # TODO: copy user script part into this file (append) wrapProgram $out/bin/nixos-test-driver \ --prefix PATH : "${lib.makeBinPath [ qemu_pkg vde2 netpbm coreutils ]}" \ ''; }; # Run an automated test suite in the given virtual network. # `driver' is the script that runs the network. runTests = driver: stdenv.mkDerivation { name = "vm-test-run-${driver.testName}"; requiredSystemFeatures = [ "kvm" "nixos-test" ]; buildCommand = '' mkdir -p $out LOGFILE=/dev/null tests='exec(os.environ["testScript"])' ${driver}/bin/nixos-test-driver ''; }; makeTest = { testScript , enableOCR ? false , name ? "unnamed" # Skip linting (mainly intended for faster dev cycles) , skipLint ? false , ... } @ t: let # A standard store path to the vm monitor is built like this: # /tmp/nix-build-vm-test-run-$name.drv-0/vm-state-machine/monitor # The max filename length of a unix domain socket is 108 bytes. # This means $name can at most be 50 bytes long. maxTestNameLen = 50; testNameLen = builtins.stringLength name; ocrProg = tesseract4.override { enableLanguages = [ "eng" ]; }; imagemagick_tiff = imagemagick_light.override { inherit libtiff; }; # Generate convenience wrappers for running the test driver # interactively with the specified network, and for starting the # VMs from the command line. mkDriver = qemu_pkg: let build-vms = import ./build-vms.nix { inherit system pkgs minimal specialArgs; extraConfigurations = extraConfigurations ++ (pkgs.lib.optional (qemu_pkg != null) { virtualisation.qemu.package = qemu_pkg; } ); }; # FIXME: get this pkg from the module system testDriver = mkTestDriver (if qemu_pkg == null then pkgs.qemu_test else qemu_pkg); nodes = build-vms.buildVirtualNetwork ( t.nodes or (if t ? machine then { machine = t.machine; } else { }) ); vlans = map (m: m.config.virtualisation.vlans) (lib.attrValues nodes); vms = map (m: m.config.system.build.vm) (lib.attrValues nodes); testScript' = # Call the test script with the computed nodes. if lib.isFunction testScript then testScript { inherit nodes; } else testScript; testDriverName = with builtins; if testNameLen > maxTestNameLen then abort ("The name of the test '${name}' must not be longer than ${toString maxTestNameLen} " + "it's currently ${toString testNameLen} characters long.") else "nixos-test-driver-${name}"; warn = if skipLint then lib.warn "Linting is disabled!" else lib.id; in warn (runCommand testDriverName { buildInputs = [ makeWrapper ]; testScript = testScript'; preferLocalBuild = true; testName = name; passthru = { inherit nodes; }; } '' mkdir -p $out/bin echo -n "$testScript" > $out/test-script ${lib.optionalString (!skipLint) '' ${python3Packages.black}/bin/black --check --diff $out/test-script ''} ln -s ${testDriver}/bin/nixos-test-driver $out/bin/ vms=($(for i in ${toString vms}; do echo $i/bin/run-*-vm; done)) wrapProgram $out/bin/nixos-test-driver \ --add-flags "''${vms[*]}" \ ${lib.optionalString enableOCR "--prefix PATH : '${ocrProg}/bin:${imagemagick_tiff}/bin'"} \ --run "export testScript=\"\$(${coreutils}/bin/cat $out/test-script)\"" \ --set VLANS '${toString vlans}' ln -s ${testDriver}/bin/nixos-test-driver $out/bin/nixos-run-vms wrapProgram $out/bin/nixos-run-vms \ --add-flags "''${vms[*]}" \ ${lib.optionalString enableOCR "--prefix PATH : '${ocrProg}/bin'"} \ --set tests 'start_all(); join_all();' \ --set VLANS '${toString vlans}' \ ${lib.optionalString (builtins.length vms == 1) "--set USE_SERIAL 1"} ''); # " passMeta = drv: drv // lib.optionalAttrs (t ? meta) { meta = (drv.meta or { }) // t.meta; }; driver = mkDriver null; driverInteractive = mkDriver pkgs.qemu; test = passMeta (runTests driver); nodeNames = builtins.attrNames driver.nodes; invalidNodeNames = lib.filter (node: builtins.match "^[A-z_]([A-z0-9_]+)?$" node == null) nodeNames; in if lib.length invalidNodeNames > 0 then throw '' Cannot create machines out of (${lib.concatStringsSep ", " invalidNodeNames})! All machines are referenced as python variables in the testing framework which will break the script when special characters are used. Please stick to alphanumeric chars and underscores as separation. '' else test // { inherit test driver driverInteractive; inherit (driver) nodes; }; runInMachine = { drv , machine , preBuild ? "" , postBuild ? "" , qemu ? pkgs.qemu_test , ... # ??? }: let build-vms = import ./build-vms.nix { inherit system pkgs minimal specialArgs extraConfigurations; }; vm = build-vms.buildVM { } [ machine { key = "run-in-machine"; networking.hostName = "client"; nix.readOnlyStore = false; virtualisation.writableStore = false; } ]; buildrunner = writeText "vm-build" '' source $1 ${coreutils}/bin/mkdir -p $TMPDIR cd $TMPDIR exec $origBuilder $origArgs ''; testScript = '' start_all() client.wait_for_unit("multi-user.target") ${preBuild} client.succeed("env -i ${bash}/bin/bash ${buildrunner} /tmp/xchg/saved-env >&2") ${postBuild} client.succeed("sync") # flush all data before pulling the plug ''; vmRunCommand = writeText "vm-run" '' xchg=vm-state-client/xchg ${coreutils}/bin/mkdir $out ${coreutils}/bin/mkdir -p $xchg for i in $passAsFile; do i2=''${i}Path _basename=$(${coreutils}/bin/basename ''${!i2}) ${coreutils}/bin/cp ''${!i2} $xchg/$_basename eval $i2=/tmp/xchg/$_basename ${coreutils}/bin/ls -la $xchg done unset i i2 _basename export | ${gnugrep}/bin/grep -v '^xchg=' > $xchg/saved-env unset xchg export tests='${testScript}' ${mkTestDriver qemu}/bin/nixos-test-driver --keep-vm-state ${vm.config.system.build.vm}/bin/run-*-vm ''; # */ in lib.overrideDerivation drv (attrs: { requiredSystemFeatures = [ "kvm" ]; builder = "${bash}/bin/sh"; args = [ "-e" vmRunCommand ]; origArgs = attrs.args; origBuilder = attrs.builder; }); runInMachineWithX = { require ? [ ], ... } @ args: let client = { ... }: { inherit require; imports = [ ../tests/common/auto.nix ]; virtualisation.memorySize = 1024; services.xserver.enable = true; test-support.displayManager.auto.enable = true; services.xserver.displayManager.defaultSession = "none+icewm"; services.xserver.windowManager.icewm.enable = true; }; in runInMachine ({ machine = client; preBuild = '' client.wait_for_x() ''; } // args); simpleTest = as: (makeTest as).test; }