notmuch: add basic test case

tests/default.nix

@@ -46,6 +46,7 @@ import nmt {
   // import ./modules/programs/git
   // import ./modules/programs/gpg
   // import ./modules/programs/newsboat
+  // import ./modules/programs/notmuch
   // import ./modules/programs/readline
   // import ./modules/programs/ssh
   // import ./modules/programs/tmux

tests/modules/programs/notmuch/basic-config-expected.conf

@@ -0,0 +1,19 @@
+# Generated by Home Manager.
+
+[database]
+path=/home/hm-user/Mail
+
+[maildir]
+synchronize_flags=true
+
+[new]
+ignore=
+tags=unread;inbox
+
+[search]
+exclude_tags=deleted;spam
+
+[user]
+name=H. M. Test
+other_email=;hm@example.org;
+primary_email=hm@example.com

tests/modules/programs/notmuch/basic-config.nix

@@ -0,0 +1,33 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  imports = [ ../../accounts/email-test-accounts.nix ];
+
+  config = {
+    home.username = "hm-user";
+    home.homeDirectory = "/home/hm-user";
+
+    programs.notmuch = {
+      enable = true;
+    };
+
+    accounts.email.accounts = {
+      "hm@example.com" = {
+        notmuch.enable = true;
+        primary = true;
+      };
+
+      hm-account.notmuch = {
+        enable = true;
+      };
+    };
+
+    nmt.script = ''
+      assertFileExists home-files/.config/notmuch/notmuchrc
+      assertFileContent home-files/.config/notmuch/notmuchrc \
+        ${./basic-config-expected.conf}
+    '';
+  };
+}

tests/modules/programs/notmuch/default.nix

@@ -0,0 +1,3 @@
+{
+  notmuch-basic-config = ./basic-config.nix;
+}