tests: make enableBig an option

This makes it possible to identify the test as big in the test file
itself. It also seems like a more natural way to control the test
running.

tests/big-test.nix

@@ -0,0 +1,13 @@
+{ lib, ... }:
+
+{
+  options.test.enableBig = lib.mkOption {
+    type = lib.types.bool;
+    default = true;
+    description = ''
+      Whether to enable <quote>big</quote> tests. These are tests that require
+      more resources than typical tests. For example, tests that depend on large
+      packages or tests that take long to run.
+    '';
+  };
+}

tests/default.nix

@@ -26,7 +26,9 @@ let
       # unnecessary rebuilds of the tests.
       manual.manpages.enable = false;
 
-      imports = [ ./asserts.nix ./stubs.nix ];
+      imports = [ ./asserts.nix ./big-test.nix ./stubs.nix ];
+
+      test.enableBig = enableBig;
     }
   ];
 
@@ -55,6 +57,7 @@ import nmt {
     ./modules/programs/browserpass
     ./modules/programs/dircolors
     ./modules/programs/direnv
+    ./modules/programs/emacs
     ./modules/programs/feh
     ./modules/programs/fish
     ./modules/programs/gh
@@ -101,6 +104,7 @@ import nmt {
   ] ++ lib.optionals isLinux [
     ./modules/config/i18n
     ./modules/i18n/input-method
+    ./modules/misc/debug
     ./modules/misc/gtk
     ./modules/misc/numlock
     ./modules/misc/pam
@@ -109,6 +113,7 @@ import nmt {
     ./modules/misc/xsession
     ./modules/programs/abook
     ./modules/programs/autorandr
+    ./modules/programs/firefox
     ./modules/programs/foot
     ./modules/programs/getmail
     ./modules/programs/gnome-terminal
@@ -152,10 +157,5 @@ import nmt {
     ./modules/services/xsettingsd
     ./modules/systemd
     ./modules/targets-linux
-  ] ++ lib.optionals enableBig [
-    ./modules/programs/emacs
-  ] ++ lib.optionals (enableBig && isLinux) [
-    ./modules/misc/debug
-    ./modules/programs/firefox
   ]);
 }

tests/modules/misc/debug/default.nix

@@ -1,5 +1,6 @@
 {
-  debug = { pkgs, config, lib, ... }: {
+  debug = { pkgs, config, lib, ... }:
+    lib.mkIf config.test.enableBig {
       home.enableDebugInfo = true;
       home.packages = with pkgs; [ curl gdb ];
 

tests/modules/programs/emacs/extra-config.nix

@@ -10,7 +10,7 @@ let
 
   emacsBin = "${config.programs.emacs.finalPackage}/bin/emacs";
 
-in {
+in lib.mkIf config.test.enableBig {
   programs.emacs = {
     enable = true;
     package = pkgs.emacs-nox;

tests/modules/programs/firefox/deprecated-native-messenger.nix

@@ -2,8 +2,7 @@
 
 with lib;
 
-{
-  config = {
+lib.mkIf config.test.enableBig {
   programs.firefox = {
     enable = true;
     enableGnomeExtensions = true;
@@ -34,5 +33,4 @@ with lib;
     configuration using 'programs.firefox.package' instead. You can refer to
     its example for how to do this.
   ''];
-  };
 }

tests/modules/programs/firefox/profile-settings.nix

@@ -2,8 +2,7 @@
 
 with lib;
 
-{
-  config = {
+lib.mkIf config.test.enableBig {
   programs.firefox = {
     enable = true;
     profiles.basic.isDefault = true;
@@ -19,8 +18,7 @@ with lib;
       bookmarks = {
         wikipedia = {
           keyword = "wiki";
-            url =
-              "https://en.wikipedia.org/wiki/Special:Search?search=%s&go=Go";
+          url = "https://en.wikipedia.org/wiki/Special:Search?search=%s&go=Go";
         };
         "kernel.org" = { url = "https://www.kernel.org"; };
       };
@@ -67,5 +65,4 @@ with lib;
       $bookmarksFile \
       ${./profile-settings-expected-bookmarks.html}
   '';
-  };
 }

tests/modules/programs/firefox/state-version-19_09.nix

@@ -2,8 +2,7 @@
 
 with lib;
 
-{
-  config = {
+lib.mkIf config.test.enableBig {
   home.stateVersion = "19.09";
 
   programs.firefox.enable = true;
@@ -27,5 +26,4 @@ with lib;
       home-path/bin/firefox \
       MOZ_APP_LAUNCHER
   '';
-  };
 }