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Test Invoice & Receipt Emails

Catch invoice bugs before customers do. Verify amounts, line items, and payment links are correct in your transactional emails.

Invoice errors damage trust and cause refunds

  • Wrong amounts or calculations go unnoticed until complaints
  • Missing or broken payment links frustrate customers
  • Dynamic content like names and items may not render
  • Currency and locale formatting can break silently

Automated invoice validation

  • Assert on amounts, taxes, and totals programmatically
  • Verify payment and download links work correctly
  • Test with different order scenarios and edge cases
  • Validate currency formatting and localization

Example

Testing Order Confirmation Emailtypescript
import { test, expect } from 'vitest';

test('order confirmation email has correct details', async () => {
  const orderEmail = `order+${Date.now()}@in.plop.email`;
  const orderData = {
    items: [
      { name: 'Pro Plan', price: 29.00, quantity: 1 },
      { name: 'Extra Seats', price: 10.00, quantity: 3 },
    ],
    tax: 5.90,
    total: 64.90,
    currency: 'USD',
  };

  // Trigger order and email
  await api.createOrder({ email: orderEmail, ...orderData });

  // Fetch receipt email
  const response = await fetch(
    `https://api.plop.email/v1/messages/latest?to=${orderEmail}`,
    { headers: { Authorization: `Bearer ${process.env.PLOP_API_KEY}` } }
  );
  const email = await response.json();

  // Verify subject
  expect(email.subject).toContain('Order Confirmation');

  // Verify line items
  expect(email.htmlContent).toContain('Pro Plan');
  expect(email.htmlContent).toContain('Extra Seats');

  // Verify amounts (accounting for currency formatting)
  expect(email.htmlContent).toMatch(/\$64\.90|64\.90\s*USD/);

  // Verify receipt/invoice link exists
  const receiptLink = email.htmlContent.match(/href="([^"]*receipt[^"]*)"/);
  expect(receiptLink).toBeTruthy();

  // Verify link works
  const linkResponse = await fetch(receiptLink[1]);
  expect(linkResponse.status).toBe(200);
});

Benefits

Prevent Revenue Loss

Catch billing errors before they reach customers.

Content Verification

Assert on amounts, items, and calculations.

Link Testing

Verify invoice downloads and payment links work.

Edge Case Coverage

Test discounts, refunds, and international orders.

Related Integrations

Jestpytest

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