Jest Email Service Test

// src/services/email.ts
import { Resend } from 'resend';

const resend = new Resend(process.env.RESEND_API_KEY);

export async function sendWelcomeEmail(to: string, name: string) {
  return resend.emails.send({
    from: 'hello@yourapp.com',
    to,
    subject: `Welcome to YourApp, ${name}!`,
    html: `
      <h1>Welcome, ${name}!</h1>
      <p>Thanks for signing up. Here's how to get started:</p>
      <a href="https://yourapp.com/dashboard">Go to Dashboard</a>
    `,
  });
}

// tests/email.test.ts
import { sendWelcomeEmail } from '../src/services/email';

const PLOP_API_URL = 'https://api.plop.email/v1';
const PLOP_API_KEY = process.env.PLOP_API_KEY!;

async function fetchEmail(to: string) {
  const response = await fetch(
    `${PLOP_API_URL}/messages/latest?to=${encodeURIComponent(to)}`,
    {
      headers: { Authorization: `Bearer ${PLOP_API_KEY}` },
    }
  );
  return response.json();
}

describe('Email Service', () => {
  it('sends welcome email with correct content', async () => {
    const testEmail = `welcome+${Date.now()}@in.plop.email`;
    const userName = 'Test User';

    // Send the email
    const result = await sendWelcomeEmail(testEmail, userName);
    expect(result.error).toBeUndefined();

    // Wait for delivery
    await new Promise((r) => setTimeout(r, 2000));

    // Fetch from plop
    const email = await fetchEmail(testEmail);

    // Verify content
    expect(email.subject).toBe(`Welcome to YourApp, ${userName}!`);
    expect(email.htmlContent).toContain(`Welcome, ${userName}!`);
    expect(email.htmlContent).toContain('Go to Dashboard');
    expect(email.htmlContent).toContain('https://yourapp.com/dashboard');
  });

  it('handles special characters in name', async () => {
    const testEmail = `special+${Date.now()}@in.plop.email`;
    const userName = "O'Brien & Co.";

    await sendWelcomeEmail(testEmail, userName);
    await new Promise((r) => setTimeout(r, 2000));

    const email = await fetchEmail(testEmail);

    // Verify HTML escaping
    expect(email.htmlContent).toContain("O'Brien");
    expect(email.subject).toContain("O'Brien");
  });
});