Add UserNotifier tests

- Test deliver_update_email_instructions/2
- Test deliver_login_instructions/2 for confirmed and unconfirmed users
- Verify email content and recipients
- Coverage remains at 67.05%

test/towerops/accounts/user_notifier_test.exs

@@ -0,0 +1,48 @@
+defmodule Towerops.Accounts.UserNotifierTest do
+  use Towerops.DataCase, async: true
+
+  import Swoosh.TestAssertions
+  import Towerops.AccountsFixtures
+
+  alias Towerops.Accounts.UserNotifier
+
+  describe "deliver_update_email_instructions/2" do
+    test "sends email with update instructions" do
+      user = user_fixture()
+      url = "https://example.com/users/settings/confirm_email/token"
+
+      assert {:ok, email} = UserNotifier.deliver_update_email_instructions(user, url)
+      assert email.to == [{"", user.email}]
+      assert email.subject == "Update email instructions"
+      assert email.text_body =~ "You can change your email"
+      assert email.text_body =~ url
+      assert_email_sent(email)
+    end
+  end
+
+  describe "deliver_login_instructions/2" do
+    test "sends confirmation instructions for unconfirmed user" do
+      user = unconfirmed_user_fixture()
+      url = "https://example.com/users/confirm/token"
+
+      assert {:ok, email} = UserNotifier.deliver_login_instructions(user, url)
+      assert email.to == [{"", user.email}]
+      assert email.subject == "Confirmation instructions"
+      assert email.text_body =~ "You can confirm your account"
+      assert email.text_body =~ url
+      assert_email_sent(email)
+    end
+
+    test "sends magic link instructions for confirmed user" do
+      user = user_fixture(%{confirmed_at: DateTime.utc_now()})
+      url = "https://example.com/users/log-in/token"
+
+      assert {:ok, email} = UserNotifier.deliver_login_instructions(user, url)
+      assert email.to == [{"", user.email}]
+      assert email.subject == "Log in instructions"
+      assert email.text_body =~ "You can log into your account"
+      assert email.text_body =~ url
+      assert_email_sent(email)
+    end
+  end
+end