1 files changed, 57 insertions, 0 deletions
diff --git a/nixos/tests/nixos-pin-version.nix b/nixos/tests/nixos-pin-version.nix
new file mode 100644
index 000000000000..91fba2e759d2
--- /dev/null
+++ b/nixos/tests/nixos-pin-version.nix
@@ -0,0 +1,57 @@
+{ system ? builtins.currentSystem }:
+
+with import ../lib/testing.nix { inherit system; };
+let
+in
+
+pkgs.stdenv.mkDerivation rec {
+  name = "nixos-pin-version";
+  src = ../..;
+  buildInputs = with pkgs; [ nix gnugrep ];
+
+    withoutPath = pkgs.writeText "configuration.nix" ''
+    {
+      nixos.extraModules = [ ({lib, ...}: { system.nixosRevision = lib.mkForce "ABCDEF"; }) ];
+    }
+  '';
+
+  withPath = pkgs.writeText "configuration.nix" ''
+    {
+      nixos.path = ${src}/nixos ;
+      nixos.extraModules = [ ({lib, ...}: { system.nixosRevision = lib.mkForce "ABCDEF"; }) ];
+    }
+  '';
+
+  phases = "buildPhase";
+  buildPhase = ''
+    datadir="${pkgs.nix}/share"
+    export TEST_ROOT=$(pwd)/test-tmp
+    export NIX_STORE_DIR=$TEST_ROOT/store
+    export NIX_LOCALSTATE_DIR=$TEST_ROOT/var
+    export NIX_LOG_DIR=$TEST_ROOT/var/log/nix
+    export NIX_STATE_DIR=$TEST_ROOT/var/nix
+    export NIX_DB_DIR=$TEST_ROOT/db
+    export NIX_CONF_DIR=$TEST_ROOT/etc
+    export NIX_MANIFESTS_DIR=$TEST_ROOT/var/nix/manifests
+    export NIX_BUILD_HOOK=
+    export PAGER=cat
+    cacheDir=$TEST_ROOT/binary-cache
+    nix-store --init
+
+    export NIX_PATH="nixpkgs=$src:nixos=$src/nixos:nixos-config=${withoutPath}" ;
+    if test $(nix-instantiate $src/nixos -A config.system.nixosRevision --eval-only) != '"ABCDEF"' ; then :;
+    else
+      echo "Unexpected re-entry without the nixos.path option defined.";
+      exit 1;
+    fi;
+
+    export NIX_PATH="nixpkgs=$src:nixos=$src/nixos:nixos-config=${withPath}" ;
+    if test $(nix-instantiate $src/nixos -A config.system.nixosRevision --eval-only) = '"ABCDEF"' ; then :;
+    else
+      echo "Expected a re-entry when the nixos.path option is defined.";
+      exit 1;
+    fi;
+
+    touch $out;
+  '';
+}