tests/profpatsch/programs/nman: add nixos test for nman

We can't really do normal unit tests, since they'd be integration tests
requiring nix. Recursive nix is also a bad idea in normal derivations,
so we add a NixOS test for nman.

Here we are also somewhat limited since we already need to have all
store paths used by nman in /nix/store otherwise we'd need to access the
network which would fail. However we can verify that nman only builds
specific store paths before finding the desired man page this way.

2 files changed, 54 insertions, 0 deletions

diff --git a/tests/default.nix b/tests/default.nix
index e47ddd46..e7f54e76 100644
--- a/tests/default.nix
+++ b/tests/default.nix
@@ -15,6 +15,7 @@ in {
   games = {
     starbound = callTest ./games/starbound.nix;
   };
+  profpatsch.programs.nman = callTest ./profpatsch/programs/nman.nix;
   programs = {
     gnupg = callTest ./programs/gnupg;
   };
diff --git a/tests/profpatsch/programs/nman.nix b/tests/profpatsch/programs/nman.nix
new file mode 100644
index 00000000..12556fa5
--- /dev/null
+++ b/tests/profpatsch/programs/nman.nix
@@ -0,0 +1,53 @@
+{ nixpkgsPath, ... }:
+
+{
+  name = "nman-test";
+
+  machine = { pkgs, lib, ... }: {
+    nix.nixPath = lib.mkForce [
+      "nixpkgs=${pkgs.path}"
+    ];
+
+    documentation.man.enable = false;
+
+    environment.systemPackages = [
+      pkgs.mandoc
+      pkgs.vuizvui.profpatsch.nman
+    ];
+
+    # add all outputs of packages which are later requested
+    # by nman in tests. note that only a single output is
+    # added which allows us to test that nman accesses the
+    # right outputs first and is as lazy as possible
+    # (any other outputs need network to be realised).
+    system.extraDependencies = [
+      pkgs.lowdown.man
+      pkgs.man-pages.out
+      pkgs.libunwind.devman
+      pkgs.w3m.out
+    ];
+
+    environment.variables = {
+      PAGER = "cat";
+    };
+  };
+
+  testScript = ''
+    # fmt: off
+    machine.start()
+
+    # man pages which exist
+    machine.succeed("nman lowdown | grep LOWDOWN.1.")
+    machine.succeed("nman w3m | grep W3M.1.")
+    machine.succeed("nman lowdown 3 | grep LOWDOWN.3.")
+    machine.succeed("nman lowdown lowdown_html_rndr | grep LOWDOWN_HTML_RNDR.3.")
+    machine.succeed("nman mandoc 7 man | grep MAN.7.")
+    machine.succeed("nman libunwind unw_init_local | grep UNW_INIT_LOCAL.3.")
+
+    # man pages which should not be found
+    machine.fail("nman aewukaishenaiugenaifesphg")
+    machine.fail("nman man-pages 50 realpath")
+    machine.fail("nman man-pages does-not-exist")
+    machine.fail("nman man-pages 3 does-not-exist")
+  '';
+}