imapnotify: move test

Also add test for the systemd service.

tests/modules/services/imapnotify-darwin/launchd.nix

@@ -0,0 +1,41 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  imports = [ ../../accounts/email-test-accounts.nix ];
+
+  accounts.email.accounts = {
+    "hm@example.com" = {
+      notmuch.enable = true;
+      imap.port = 993;
+
+      imapnotify = {
+        enable = true;
+        boxes = [ "Inbox" ];
+        onNotify = ''
+          ${pkgs.notmuch}/bin/notmuch new
+        '';
+      };
+    };
+  };
+
+  services.imapnotify = {
+    enable = true;
+    package = (config.lib.test.mkStubPackage {
+      name = "goimapnotify";
+      outPath = "@goimapnotify@";
+    });
+  };
+
+  test.stubs.notmuch = { };
+
+  nmt.script = let
+    serviceFileName = "org.nix-community.home.imapnotify-hm-example.com.plist";
+  in ''
+    serviceFile="LaunchAgents/${serviceFileName}"
+    serviceFileNormalized="$(normalizeStorePaths "$serviceFile")"
+    assertFileExists $serviceFile
+    assertFileContent $serviceFileNormalized ${./launchd.plist}
+  '';
+}