fix(email): test saved SMTP config and add TLS modes (#3388)

fluxer_api/pkgs/email/src/SmtpEmailProvider.test.ts

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import {SmtpEmailProvider} from '@pkgs/email/src/SmtpEmailProvider';
+import {beforeEach, describe, expect, it, vi} from 'vitest';
+
+const {createTransport} = vi.hoisted(() => ({createTransport: vi.fn()}));
+
+vi.mock('nodemailer', () => ({default: {createTransport}}));
+
+describe('SmtpEmailProvider', () => {
+	beforeEach(() => {
+		createTransport.mockReset();
+		createTransport.mockReturnValue({sendMail: vi.fn(), verify: vi.fn()});
+	});
+
+	it.each([
+		{port: 465, tlsMode: undefined, secure: true, requireTLS: false, ignoreTLS: false},
+		{port: 587, tlsMode: undefined, secure: false, requireTLS: true, ignoreTLS: false},
+		{port: 587, tlsMode: null, secure: false, requireTLS: true, ignoreTLS: false},
+		{port: 587, tlsMode: 'implicit', secure: true, requireTLS: false, ignoreTLS: false},
+		{port: 465, tlsMode: 'starttls', secure: false, requireTLS: true, ignoreTLS: false},
+		{port: 25, tlsMode: 'opportunistic', secure: false, requireTLS: false, ignoreTLS: false},
+		{port: 587, tlsMode: 'none', secure: false, requireTLS: false, ignoreTLS: true},
+	] as const)('maps TLS mode $tlsMode on port $port to nodemailer options', ({port, tlsMode, ...expected}) => {
+		new SmtpEmailProvider({host: 'smtp.example.com', port, username: 'user', password: 'pass', tlsMode});
+		expect(createTransport).toHaveBeenCalledWith(expect.objectContaining(expected));
+	});
+});