treewide: Align the rest of the files with the server repository

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diff --git a/tests/old/README.md b/tests/old/README.md
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+<!--
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+-->
+
+# How to write a test
+
+Test are simple derivations, put into the `by-name` directory. As you
+often want to test configuration, the 'standard' nixos-vm-test function
+starts a vm with the specified configuration and lets you run a python
+test script.
+
+But, I've noticed, that most of my tests in this nixos-configuration are
+actually testing the home-manager config of a program. As such I've built
+a test infrastructure on top of the pre-existing nixos-vm-tests. It is
+further described in the `mkTest` section.
+
+## `mkTest`
+
+A standard application test would look somewhat like this:
+
+```nix
+{mkTest}:
+mkTest {
+  name = "my-tests";
+
+  # The configuration to add.
+  # In this case, the less config is being tested.
+  configuration = {
+    imports = [
+      ../../../../modules/by-name/le/less/module.nix
+    ];
+    config.soispha.programs.less.enable = true;
+  };
+
+  # Files that are provided at the test directory.
+  # In this case, the test dir would have a `./data/test.file`
+  # path pre-populated with the
+  # contents of the file at the lhs.
+  testData = {
+    "data/test.file" = ./data/test.file;
+  };
+
+  # The description of what to do in the test.
+  description = ./test.desc;
+
+  # A sha256 hashsum of the concatenated output of the program.
+  # This can be `null` to disable the checksum mechanism.
+  hash = "87901231393b51cdd45bbb4339a32db2894a3a5ab164cb5c7a8fa14721fdcba7";
+}
+```
+
+### The test description file
+
+All line starting with `#` or only containing white space are
+ignored. Additionally, all leading and trailing white space is stripped
+before evaluating.
+
+The general syntax is:
+
+```
+COMMAND ARGS
+```
+
+where `COMMAND` is one of the commands listed in [Commands](#commands)
+
+The `ARGS` are the verbatim content from the space after the `COMMAND`
+to the end of line character.
+
+You can run the description file, similarly as in the tests via the `run_test_description`
+package exported by the flake.
+
+#### Commands
+
+##### `Type`
+
+Send the `ARGS` to the application. This interprets `ARGS` as specified
+by the TMUX (1) man page on `send-keys`.
+
+#### `Sleep`
+
+Sleep for `ARGS` seconds.
+
+#### `Expect`
+
+Grep the currently visible screen for the regex `ARGS`. This regex
+must match.
+
+#### `ExpectNot`
+
+Does the same thing as [Expect](#expect), but enforces, that the
+regex does not match.
+
+#### `SetGolden`
+
+Set the golden file (the file used for the hash generation) to `ARGS`.
+`ARGS` must be a valid file path.
+
+#### `Exec`
+
+Executes the command (`ARGS`) and waits until it finishes.
+This will hang forever, when the command that does not exit.
diff --git a/tests/old/by-name/le/less/data/test.file b/tests/old/by-name/le/less/data/test.file
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+Line number 941.
+Line number 942.
+Line number 943.
+Line number 944.
+Line number 945.
+Line number 946.
+Line number 947.
+Line number 948.
+Line number 949.
+Line number 950.
+Line number 951.
+Line number 952.
+Line number 953.
+Line number 954.
+Line number 955.
+Line number 956.
+Line number 957.
+Line number 958.
+Line number 959.
+Line number 960.
+Line number 961.
+Line number 962.
+Line number 963.
+Line number 964.
+Line number 965.
+Line number 966.
+Line number 967.
+Line number 968.
+Line number 969.
+Line number 970.
+Line number 971.
+Line number 972.
+Line number 973.
+Line number 974.
+Line number 975.
+Line number 976.
+Line number 977.
+Line number 978.
+Line number 979.
+Line number 980.
+Line number 981.
+Line number 982.
+Line number 983.
+Line number 984.
+Line number 985.
+Line number 986.
+Line number 987.
+Line number 988.
+Line number 989.
+Line number 990.
+Line number 991.
+Line number 992.
+Line number 993.
+Line number 994.
+Line number 995.
+Line number 996.
+Line number 997.
+Line number 998.
+Line number 999.
+Line number 1000.
diff --git a/tests/old/by-name/le/less/data/test.file.license b/tests/old/by-name/le/less/data/test.file.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/tests/old/by-name/le/less/data/test.file.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/tests/old/by-name/le/less/test.desc b/tests/old/by-name/le/less/test.desc
new file mode 100644
index 00000000..a0c49e7b
--- /dev/null
+++ b/tests/old/by-name/le/less/test.desc
@@ -0,0 +1,50 @@
+# This is a specification of what to do in the test script.
+# It is inspired by the syntax of vhs tapes.
+
+# Give everything time to start up
+Sleep 2
+
+Type less ./data/test.file
+Sleep 1
+Type Enter
+Sleep 2
+
+Type G
+Sleep 1
+Expect ^Line number 1000.$
+
+Type gg
+Sleep 1
+Expect ^Line number 1.$
+
+Type Space
+Sleep 1
+Expect ^Line number 23.$
+ExpectNot ^Line number 22.$
+ExpectNot ^Line number 46.$
+
+Type tt
+Sleep 1
+ExpectNot ^Line number 23.$
+ExpectNot ^Line number 24.$
+Expect ^Line number 25.$
+Expect ^Line number 47.$
+
+Type Gn
+Sleep 1
+Expect ^Line number 999.$
+ExpectNot ^Line number 1000.$
+
+# Type Up
+# Sleep 1
+# ExpectNot ^Line number 976.$
+# Expect ^Line number 999.$
+#
+# Type Down
+# Sleep 1
+# ExpectNot ^Line number 1000.$
+# Expect ^Line number 977.$
+
+Type Escape
+
+# vim: ft=tape
diff --git a/tests/old/by-name/le/less/test.desc.license b/tests/old/by-name/le/less/test.desc.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/tests/old/by-name/le/less/test.desc.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/tests/old/by-name/le/less/test.nix b/tests/old/by-name/le/less/test.nix
new file mode 100644
index 00000000..c9716ffc
--- /dev/null
+++ b/tests/old/by-name/le/less/test.nix
@@ -0,0 +1,30 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{mkTest, ...}:
+mkTest {
+  name = "less";
+
+  configuration = {
+    imports = [
+      ../../../../modules/by-name/le/less/module.nix
+    ];
+    config.soispha.programs.less.enable = true;
+  };
+
+  testData = {
+    "data/test.file" = ./data/test.file;
+  };
+
+  description = ./test.desc;
+
+  # FIXME: Currently the golden file is not reproducible. <2024-11-22>
+  hash = null;
+  # hash = "87901231393b51cdd45bbb4339a32db2894a3a5ab164cb5c7a8fa14721fdcba7";
+}
diff --git a/tests/old/by-name/nv/nvim-checkhealth/test.desc b/tests/old/by-name/nv/nvim-checkhealth/test.desc
new file mode 100644
index 00000000..169cf49f
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-checkhealth/test.desc
@@ -0,0 +1,10 @@
+# We open a `*.norg` file to run the norg ftplugin.
+Exec nvim test.norg --headless "+set nospell" "+checkhealth" "+w! health.log" +q +wa +qa
+
+# The `checkhealth` output is not reproducible.
+# Thus only output the warnings/errors.
+Exec batgrep --ignore-case 'warning|error' health.log > new_golden
+
+SetGolden new_golden
+
+# vim: ft=tape
diff --git a/tests/old/by-name/nv/nvim-checkhealth/test.desc.license b/tests/old/by-name/nv/nvim-checkhealth/test.desc.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-checkhealth/test.desc.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/tests/old/by-name/nv/nvim-checkhealth/test.nix b/tests/old/by-name/nv/nvim-checkhealth/test.nix
new file mode 100644
index 00000000..cb04e758
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-checkhealth/test.nix
@@ -0,0 +1,55 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{
+  mkTest,
+  extraModules,
+  pkgs,
+  ...
+}:
+mkTest {
+  name = "nvim-checkhealth";
+
+  configuration = {
+    imports = [
+      ../../../../modules/by-name/nv/nvim/module.nix
+      ../../../../modules/by-name/ni/nixpkgs/module.nix
+    ];
+    config = {
+      soispha = {
+        nixpkgs = {
+          enable = true;
+          systemName = "x86_64-linux";
+        };
+        programs.nvim = {
+          enable = true;
+          shell = pkgs.zsh;
+        };
+      };
+      home-manager.users.soispha = {
+        home.packages = [
+          pkgs.bat
+          pkgs.ripgrep
+          pkgs.bat-extras.batgrep
+        ];
+        imports = [
+          extraModules.nixvim.homeManagerModule
+        ];
+      };
+    };
+  };
+
+  testData = {};
+
+  description = ./test.desc;
+
+  # FIXME: This is not reproducible, but is also not checked via `Expect`s. As such this
+  # whole test is quite useless, but it might work some day. <2024-11-30>
+  hash = null;
+}
diff --git a/tests/old/by-name/nv/nvim-neorg/data/index.norg b/tests/old/by-name/nv/nvim-neorg/data/index.norg
new file mode 100644
index 00000000..4d643019
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-neorg/data/index.norg
@@ -0,0 +1,16 @@
+@document.meta
+title: index
+description:
+authors: soispha
+categories:
+created: 2023-08-29
+updated: 2023-08-29
+version: 1.1.1
+@end
+
+* First heading
+- {* Second heading}[Second]
+
+
+* Second heading
+-- {:./reference.norg:}[References]
diff --git a/tests/old/by-name/nv/nvim-neorg/data/index.norg.license b/tests/old/by-name/nv/nvim-neorg/data/index.norg.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-neorg/data/index.norg.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/tests/old/by-name/nv/nvim-neorg/data/reference.norg b/tests/old/by-name/nv/nvim-neorg/data/reference.norg
new file mode 100644
index 00000000..b572a469
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-neorg/data/reference.norg
@@ -0,0 +1,11 @@
+@document.meta
+title: references
+description:
+authors: soispha
+categories:
+created: 2023-08-29
+updated: 2023-08-29
+version: 1.1.1
+@end
+
+* Some other content
diff --git a/tests/old/by-name/nv/nvim-neorg/data/reference.norg.license b/tests/old/by-name/nv/nvim-neorg/data/reference.norg.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-neorg/data/reference.norg.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/tests/old/by-name/nv/nvim-neorg/test.desc b/tests/old/by-name/nv/nvim-neorg/test.desc
new file mode 100644
index 00000000..bd1e8f49
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-neorg/test.desc
@@ -0,0 +1,73 @@
+Type nvim
+Sleep 3
+Type Enter
+Sleep 9
+# Remove the spellfile download prompt
+Type C-c
+ExpectNot Warning: Cannot find word list
+Expect Nvim is open source and freely distributable
+
+Type :NeorgStart
+Sleep 1.5
+Type Enter
+Sleep 4
+
+Type :Neorg workspace general
+Sleep 1.5
+Type Enter
+Sleep 4
+
+
+Type 10t
+Sleep 0.5
+
+# Cursor is on the first heading
+Type iMARKER
+Sleep 0.5
+Type Escape
+Sleep 2
+Expect ^11\s*MARKER◉ First heading$
+
+# Now moves to the link to the second
+Type t
+Sleep 0.2
+Type $
+Sleep 0.2
+Type h
+Sleep 0.2
+Type Enter
+Sleep 0.5
+
+# Should be on the second
+Type iMARKER
+Sleep 0.5
+Type Escape
+Sleep 2
+Expect ^15\s*◉ MARKERSecond heading$
+
+# Moves to the references file
+Type t
+Sleep 0.2
+Type $
+Sleep 0.2
+Type h
+Sleep 0.2
+Type Enter
+Sleep 0.5
+
+# Skip another spell file prompt
+Type Enter
+Sleep 0.5
+
+
+Type 10t
+Sleep 1.0
+
+Expect ^11\s*◉ Some other content$
+
+Type :q!
+Sleep 0.5
+Type Enter
+Sleep 1
+
+# vim: ft=tape
diff --git a/tests/old/by-name/nv/nvim-neorg/test.desc.license b/tests/old/by-name/nv/nvim-neorg/test.desc.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-neorg/test.desc.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/tests/old/by-name/nv/nvim-neorg/test.nix b/tests/old/by-name/nv/nvim-neorg/test.nix
new file mode 100644
index 00000000..9f160df5
--- /dev/null
+++ b/tests/old/by-name/nv/nvim-neorg/test.nix
@@ -0,0 +1,55 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{
+  mkTest,
+  extraModules,
+  pkgs,
+  ...
+}:
+mkTest {
+  name = "nvim-neorg";
+
+  configuration = {
+    imports = [
+      ../../../../modules/by-name/nv/nvim/module.nix
+      ../../../../modules/by-name/ni/nixpkgs/module.nix
+    ];
+    config = {
+      soispha = {
+        nixpkgs = {
+          enable = true;
+          systemName = "x86_64-linux";
+        };
+        programs.nvim = {
+          enable = true;
+          shell = pkgs.zsh;
+        };
+      };
+      home-manager.users.soispha = {
+        imports = [
+          extraModules.nixvim.homeManagerModule
+        ];
+      };
+    };
+  };
+
+  alternateScreen = false;
+
+  testData = {
+    "/home/soispha/repos/notes/general/index.norg" = ./data/index.norg;
+    "/home/soispha/repos/notes/general/reference.norg" = ./data/reference.norg;
+  };
+
+  description = ./test.desc;
+
+  # The golden file is just full of nvim's terminal control sequences. There is no point
+  # in trying to check it.
+  hash = null;
+}
diff --git a/tests/old/by-name/ya/yambar/test.desc b/tests/old/by-name/ya/yambar/test.desc
new file mode 100644
index 00000000..067c201e
--- /dev/null
+++ b/tests/old/by-name/ya/yambar/test.desc
@@ -0,0 +1,5 @@
+Exec yambar --validate && echo "SUCCESS"
+
+Expect ^SUCCESS$
+
+# vim: ft=tape
diff --git a/tests/old/by-name/ya/yambar/test.desc.license b/tests/old/by-name/ya/yambar/test.desc.license
new file mode 100644
index 00000000..eae6a84c
--- /dev/null
+++ b/tests/old/by-name/ya/yambar/test.desc.license
@@ -0,0 +1,9 @@
+nixos-config - My current NixOS configuration
+
+Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+SPDX-License-Identifier: GPL-3.0-or-later
+
+This file is part of my nixos-config.
+
+You should have received a copy of the License along with this program.
+If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
diff --git a/tests/old/by-name/ya/yambar/test.nix b/tests/old/by-name/ya/yambar/test.nix
new file mode 100644
index 00000000..0e4d0033
--- /dev/null
+++ b/tests/old/by-name/ya/yambar/test.nix
@@ -0,0 +1,33 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{mkTest, ...}:
+mkTest {
+  name = "yambar";
+
+  configuration = {
+    imports = [
+      ../../../../modules/by-name/ya/yambar/module.nix
+      ../../../../modules/by-name/ni/nixpkgs/module.nix
+    ];
+    config.soispha = {
+      programs.yambar.enable = true;
+      nixpkgs = {
+        enable = true;
+        systemName = "x86_64-linux";
+      };
+    };
+  };
+
+  testData = {};
+
+  description = ./test.desc;
+
+  hash = "aa90e8898fa23c76299158415cb29db739165e94c252a447aff763ab24fbfc9c";
+}
diff --git a/tests/old/default.nix b/tests/old/default.nix
new file mode 100644
index 00000000..d13723b4
--- /dev/null
+++ b/tests/old/default.nix
@@ -0,0 +1,50 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{
+  lib,
+  nixLib,
+  pkgs,
+  myPkgs,
+  nixpkgs_as_input,
+  sysLib,
+  extraModules,
+  nixpkgs_open_prs,
+  system,
+}: let
+  mkTest = import ./infrastructure {
+    inherit
+      pkgs
+      lib
+      nixos-lib
+      myPkgs
+      extraModules
+      sysLib
+      nixpkgs_open_prs
+      system
+      ;
+  };
+
+  nixos-lib = import (nixpkgs_as_input + "/nixos/lib") {};
+
+  tests = nixLib.mkByName {
+    baseDirectory = ./by-name;
+    fileName = "test.nix";
+    finalizeFunction = name: value:
+      import value {
+        inherit
+          mkTest
+          extraModules
+          pkgs
+          myPkgs
+          ;
+      };
+  };
+in
+  tests
diff --git a/tests/old/infrastructure/clean.awk b/tests/old/infrastructure/clean.awk
new file mode 100644
index 00000000..0362d38b
--- /dev/null
+++ b/tests/old/infrastructure/clean.awk
@@ -0,0 +1,23 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+
+{
+    # Shell like comments
+    gsub(/^#.*$/, "", $0)
+
+    # Strip leading and trailing white space
+    gsub(/^[[:blank:]]*/, "", $0)
+    gsub(/[[:blank:]]*$/, "", $0)
+
+    # Only accept the line, if it contains something
+    if (NF) {
+        print $0
+    }
+}
diff --git a/tests/old/infrastructure/default.nix b/tests/old/infrastructure/default.nix
new file mode 100644
index 00000000..cd21198c
--- /dev/null
+++ b/tests/old/infrastructure/default.nix
@@ -0,0 +1,177 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{
+  pkgs,
+  myPkgs,
+  lib,
+  nixos-lib,
+  extraModules,
+  sysLib,
+  nixpkgs_open_prs,
+  system,
+}: {
+  name,
+  configuration,
+  description,
+  hash,
+  testData,
+  testShell ? pkgs.dash,
+  alternateScreen ? false,
+}:
+nixos-lib.runTest {
+  hostPkgs = pkgs; # the Nixpkgs package set used outside the VMs
+
+  inherit name;
+
+  node = {
+    specialArgs = {
+      inherit
+        myPkgs
+        sysLib
+        nixpkgs_open_prs
+        system
+        ;
+    };
+    # Use the nixpkgs as constructed by the `nixpkgs.*` options
+    pkgs = null;
+  };
+
+  nodes = {
+    machine = {config, ...}: {
+      imports =
+        [
+          extraModules.home-manager
+          ../../modules/by-name/us/users/module.nix
+        ]
+        ++ configuration.imports;
+
+      config = lib.modules.mkMerge [
+        {
+          soispha = {
+            users = {
+              enable = true;
+
+              # The password is 'test'.
+              hashedPassword = "$y$j9T$yYYUpE9OaxmEO8MaPI2jr0$WGpYYWaLySakI.Mwqz4sljGSOetAp4s5CIUa1VUU1l2";
+            };
+          };
+          home-manager.users.soispha.home.stateVersion = "24.11";
+        }
+        configuration.config
+      ];
+    };
+  };
+
+  testScript = {nodes, ...}: let
+    testDir = "${nodes.machine.home-manager.users.soispha.home.homeDirectory}/test";
+    goldenFile = "${testDir}/__test_golden";
+    logFile = "${testDir}/__test_log";
+    testTmux = lib.getExe pkgs.tmux;
+  in
+    /*
+    python
+    */
+    ''
+      start_all()
+
+      __TEST_TMUX="${testTmux}"
+
+      machine.succeed("sudo -u soispha ${pkgs.writeShellScript "mkTestEnvironment" ''
+        set -e
+
+        mkdir --parents "${testDir}"
+        cd "${testDir}"
+
+        ${
+          lib.strings.concatStringsSep "\n\n" (
+            builtins.attrValues
+            (builtins.mapAttrs
+              (name: value: ''
+                mkdir --parents "$(dirname '${name}')"
+                cp --recursive '${value}' '${name}'
+              '')
+              testData)
+          )
+        }
+      ''}")
+
+      machine.succeed("sudo -u soispha ${pkgs.writeShellScript "mkGoldenRecord" ''
+        set -e
+
+        # HACK: Prevent zsh from complaining about missing configuration.
+        # TODO: These tests should probably just run under bash. <2024-11-22>
+        touch ~soispha/.zshrc
+
+        cd "${testDir}"
+
+        __TEST_TMUX="${testTmux}"
+        __TEST_SHELL="${lib.getExe testShell}"
+        __TEST_TMUX_PANE="__TEST_TMUX_PANE"
+
+        __TEST_EVAL_USE_ALTERNATE_SCREEN="${
+          if alternateScreen
+          then "true"
+          else "false"
+        }"
+        __TEST_EVAL_AWK_CLEAN_FILE="${./clean.awk}"
+        __TEST_EVAL_LOG_FILE="${logFile}"
+        __TEST_EVAL_GOLDEN_FILE="$(mktemp)"
+        printf "%s" "${goldenFile}" >"$__TEST_EVAL_GOLDEN_FILE"
+
+        . ${./driver.sh}
+
+        "$__TEST_TMUX" new-session -d -s "$__TEST_TMUX_PANE" "$__TEST_SHELL"
+
+        # Warm up the shell in the tmux sesssion
+        "$__TEST_TMUX" send-keys -t "$__TEST_TMUX_PANE" "echo hi" "Enter" "clear" "Enter"
+        sleep 2
+
+        "$__TEST_TMUX" pipe-pane -t "$__TEST_TMUX_PANE" -o 'cat >>${goldenFile}'
+
+        __test_eval "${description}"
+
+        # Remove the pipe
+        "$__TEST_TMUX" pipe-pane -t "$__TEST_TMUX_PANE"
+
+        # Check if the golden file was changed.
+        if [ "$(cat "$__TEST_EVAL_GOLDEN_FILE")" != "${goldenFile}" ]; then
+          mv "$(cat "$__TEST_EVAL_GOLDEN_FILE")" "${goldenFile}"
+        fi
+
+        rm "$__TEST_EVAL_GOLDEN_FILE"
+      ''}")
+
+      machine.succeed("sudo -u soispha ${pkgs.writeShellScript "testHashOfGolden" (''
+          set -e
+
+          cd "${testDir}"
+        ''
+        + lib.optionalString (hash != null)
+        /*
+        bash
+        */
+        ''
+          golden_hash="$(sha256sum ${goldenFile} | awk '{print $1}')"
+
+          if [ "$golden_hash" != "${hash}" ]; then
+            echo "Hash mismatch."
+            echo "Expected '${hash}',"
+            echo "but got '$golden_hash'"
+            exit 1
+          else
+            echo "Hash was successfully checked."
+          fi
+        '')}")
+
+
+      machine.copy_from_vm("${goldenFile}", "golden")
+      machine.copy_from_vm("${logFile}", "log")
+    '';
+}
diff --git a/tests/old/infrastructure/driver.sh b/tests/old/infrastructure/driver.sh
new file mode 100644
index 00000000..a8b241d2
--- /dev/null
+++ b/tests/old/infrastructure/driver.sh
@@ -0,0 +1,176 @@
+#! /usr/bin/env bash
+
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+
+set -e
+
+msg() {
+    if [ "$#" -ne 0 ]; then
+        echo "$@" | tee --append "$__TEST_EVAL_LOG_FILE" >&2
+    else
+        cat | tee --append "$__TEST_EVAL_LOG_FILE" >&2
+    fi
+}
+
+# Use bash built-ins to trim a string
+# source: https://stackoverflow.com/a/3352015
+trim() {
+    local var="$*"
+    # remove leading whitespace characters
+    var="${var#"${var%%[![:space:]]*}"}"
+    # remove trailing whitespace characters
+    var="${var%"${var##*[![:space:]]}"}"
+    printf '%s' "$var"
+}
+
+# contains(string, substring)
+#
+# Returns 0 if the specified string contains the specified substring,
+# otherwise returns 1.
+contains() {
+    string="$1"
+    substring="$2"
+    if [ "${string#*"$substring"}" != "$string" ]; then
+        return 0 # $substring is in $string
+    else
+        return 1 # $substring is not in $string
+    fi
+}
+
+__test_wait_for_pid() {
+    local pre_pids_file="$1"
+
+    exec_pids="$(mktemp)"
+    ps -eo tty,pid | awk "--assign=tmuxTty=$tmux_tty" '{if ($1 == tmuxTty) {print $2}}' >"$exec_pids"
+
+    while read -r pid; do
+        sed --in-place "s/$pid//" "$exec_pids"
+    done <"$pre_pids_file"
+
+    gawk --include inplace '{if (NF) {print $0}}' "$exec_pids"
+
+    if [ "$(wc -l <"$exec_pids")" -eq 0 ]; then
+        # No further spawned processes left
+        return 0
+    else
+        # Some other program is still running
+        pid="$(tail -n 1 "$exec_pids")"
+        rm "$exec_pids"
+        name="$(trim "$(tr '\0' ' ' <"/proc/$pid/cmdline")")"
+
+        msg "Waiting until command ('$name') finishes (has pid: $pid).."
+
+        # This allows waiting for non-children of the current shell
+        # source: https://stackoverflow.com/a/76046235
+        tail --pid "$pid" --follow /dev/null &
+        wait $!
+
+        # Give the `testShell` some time, to process the next command from a chained command.
+        sleep 0.2
+        __test_wait_for_pid "$pre_pids_file"
+    fi
+}
+
+__test_eval() {
+    tmux="$__TEST_TMUX"
+    tpane="$__TEST_TMUX_PANE"
+    file="$1"
+
+    awk --file "$__TEST_EVAL_AWK_CLEAN_FILE" "$file" | while read -r cmd args; do
+        case "$cmd" in
+        "Type")
+            msg "Sending keys to application '$args'.."
+            "$tmux" send-keys -t "$tpane": "$args"
+            ;;
+        "Sleep")
+            msg "Sleeping for '$args' seconds.."
+            sleep "$args"
+            ;;
+        "Exec")
+            local pre_exec_pids
+            local tmux_tty
+
+            msg "Executing command '$args'.."
+            tmux_tty="$("$tmux" list-panes -t "$tpane" -F "#{pane_tty}" | sed 's|/dev/||')"
+
+            pre_exec_pids="$(mktemp)"
+            ps -eo tty,pid | awk "--assign=tmuxTty=$tmux_tty" '{if ($1 == tmuxTty) {print $2}}' >"$pre_exec_pids"
+
+            "$tmux" send-keys -t "$tpane": "$args" "Enter"
+            sleep 1
+
+            __test_wait_for_pid "$pre_exec_pids"
+
+            rm "$pre_exec_pids"
+            msg "Finished command '$args'."
+            ;;
+        "Expect" | "ExpectNot")
+            msg "Trying to match regex ('$args') for currently visible content.."
+
+            get_plane_text() {
+                alternate=""
+                [ "$__TEST_EVAL_USE_ALTERNATE_SCREEN" = "true" ] && alternate="-a"
+
+                "$tmux" capture-pane -t "$tpane" -p $alternate -S 0 -E -
+            }
+
+            matched=""
+            if get_plane_text | grep "$args"; then
+                matched=true
+            else
+                matched=false
+            fi
+
+            case "$cmd" in
+            "Expect")
+                if [ "$matched" = true ]; then
+                    msg "Regex matched."
+                else
+                    msg "Failed to find string, matched by regex '$args' on the screen"
+                    msg current screen:
+                    get_plane_text | msg
+
+                    exit 1
+                fi
+                ;;
+            "ExpectNot")
+                if [ "$matched" = false ]; then
+                    msg "Regex successfully not matched."
+                else
+                    msg "Found to find string, matched by regex '$args' on the screen. But expected none"
+                    msg current screen:
+                    get_plane_text | msg
+
+                    exit 1
+                fi
+                ;;
+            *)
+                msg "Entered unrechable code. This is a bug."
+                exit 1
+                ;;
+            esac
+            ;;
+        "SetGolden")
+            msg "Trying to set '$args' as golden file."
+            [ -f "$args" ] || {
+                msg "Argument is not a file!"
+                exit 1
+            }
+            printf "%s" "$args" >"$__TEST_EVAL_GOLDEN_FILE"
+            msg "Set golden file to: '$args'"
+            ;;
+        *)
+            msg "Unrecognized command: '$cmd'"
+            exit 1
+            ;;
+        esac
+    done
+}
diff --git a/tests/old/infrastructure/run.nix b/tests/old/infrastructure/run.nix
new file mode 100644
index 00000000..3148a2d9
--- /dev/null
+++ b/tests/old/infrastructure/run.nix
@@ -0,0 +1,54 @@
+# nixos-config - My current NixOS configuration
+#
+# Copyright (C) 2025 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+# This file is part of my nixos-config.
+#
+# You should have received a copy of the License along with this program.
+# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
+{
+  pkgs,
+  lib,
+}:
+pkgs.writeShellScriptBin "run_test_description" ''
+  set -eu
+
+  [ "$#" -ne 1 ] && {
+    echo "Usage: $0 <Test description file>";
+    exit 2
+  }
+  description="$(realpath "$1")"
+
+  base="$(mktemp -d)"
+  cd "$base"
+
+  __TEST_TMUX="${lib.getExe pkgs.tmux}"
+  __TEST_SHELL="${lib.getExe pkgs.dash}"
+  __TEST_TMUX_PANE="__TEST_TMUX_PANE"
+
+  __TEST_EVAL_USE_ALTERNATE_SCREEN="false"
+  __TEST_EVAL_AWK_CLEAN_FILE="${./clean.awk}"
+  __TEST_EVAL_LOG_FILE="__test_log"
+  __TEST_EVAL_GOLDEN_FILE="$(mktemp)"
+  printf "%s" "__test_golden" >"$__TEST_EVAL_GOLDEN_FILE"
+
+  . ${./driver.sh}
+
+  echo "Setting up a session.."
+  if "$__TEST_TMUX" has-session -t "$__TEST_TMUX_PANE"; then
+    echo "Killing old '$__TEST_TMUX_PANE' session."
+    "$__TEST_TMUX" kill-session -t "$__TEST_TMUX_PANE"
+  fi
+  "$__TEST_TMUX" new-session -d -s "$__TEST_TMUX_PANE"
+
+  echo "Initializing pipe.."
+  "$__TEST_TMUX" pipe-pane -t "$__TEST_TMUX_PANE" -o 'cat >>./test.golden'
+
+  echo "Evaluating description.."
+  __test_eval "$description"
+
+  "$__TEST_TMUX" pipe-pane -t "$__TEST_TMUX_PANE"
+
+  echo "Base dir: $base"
+''