Test storefront guest checkout with a test card

The flow under test

The value of testing checkout end to end is that the total has to survive four separate recalculations before anyone sees it, and each one is a place where tax, shipping or a currency rounding rule can move the number.

• Subtotal on the cart page - $32.00 for the Heavyweight Cotton Tee, before anything else is applied.
• Total in the order summary - $41.06 once shipping and tax are added on the checkout page.
• Total paid on the confirmation - $41.06 again, matching the summary, with order number #1003.

Asserting all three, rather than only the last, is what turns a green run into useful information. A mismatch between the summary and the amount charged is a support ticket and a chargeback, and it only shows up if the test looks at both.

The test file

Each step is one sentence describing an action and the thing that has to be true afterwards. The fourth step fills five fields in a single instruction, which Kane CLI plans in one pass rather than one field at a time.

---
mode: testing
url: https://my-testing-repo-main.vercel.app/shopify-clone-app?reset=true
max_steps: 45
tags: [shopify, e-commerce, checkout]
---

# Shoplify 2.1: Storefront guest checkout

Catalog objective: add a product to cart and complete checkout as a guest with a test card.
Key assertion: thank-you page shows order number and correct total.

## Add a product to the cart
Click "Add to cart" on "Heavyweight Cotton Tee" and verify the page shows a confirmation reading "Added Heavyweight Cotton Tee to cart".

## Open the cart
Click "View cart" and verify the cart lists "Heavyweight Cotton Tee" with a subtotal of "$32.00".

## Go to checkout
Click "Checkout" and verify the checkout page shows "Guest checkout - no account required" and a "Contact" section.

## Fill in contact and shipping
Type "guest@example.com" into Email, "Dana Reyes" into "Full name", "9 Pine Lane" into Address, "Austin" into City, and "78701" into ZIP, then verify the order summary shows a Total of "$41.06".

## Pay with the test card
Type "4242 4242 4242 4242" into "Card number", "12 / 34" into Expiration, "123" into CVC, click the Pay button, and verify the page shows "Thank you for your order!" with order number "#1003" and a total paid of "$41.06".

The card number is written into the file here because it is a public test card on a demo storefront. For a real checkout, pass it as a secret variable so the value never reaches version control. Run the test with:

kane-cli testmd run tests/shopify/guest-checkout_test.md

The run

All five passed. The payment step is the slowest at 86 seconds, which is expected: it fills three card fields, submits, and then waits for a confirmation page to render.

---
test: ../guest-checkout_test.md
status: passed
started: 2026-09-15T09:17:15.944Z
duration_s: 257
session_id: d98a48c0-d1d8-4ce3-9b71-30c9ae64d795
---

# Shoplify 2.1: Storefront guest checkout - Result

## Add a product to the cart ✓ passed (32.7s)
md5: 58762b11031975bad7857c925fc411f7
Click "Add to cart" on "Heavyweight Cotton Tee" and verify the page shows a confirmation reading "Added Heavyweight Cotton Tee to cart".

## Open the cart ✓ passed (40.7s)
md5: 6d0e845154fea05ae67bb8f0ee5ee806
Click "View cart" and verify the cart lists "Heavyweight Cotton Tee" with a subtotal of "$32.00".

## Go to checkout ✓ passed (47.5s)
md5: a756eb905a441072a940cb6004284df9
Click "Checkout" and verify the checkout page shows "Guest checkout - no account required" and a "Contact" section.

## Fill in contact and shipping ✓ passed (46.2s)
md5: d51fceaad20e7483e0dfc311f5dc7453
Type "guest@example.com" into Email, "Dana Reyes" into "Full name", "9 Pine Lane" into Address, "Austin" into City, and "78701" into ZIP, then verify the order summary shows a Total of "$41.06".

## Pay with the test card ✓ passed (86s)
md5: 1bd389db0092097ede958d01ecd83b19
Type "4242 4242 4242 4242" into "Card number", "12 / 34" into Expiration, "123" into CVC, click the Pay button, and verify the page shows "Thank you for your order!" with order number "#1003" and a total paid of "$41.06".

Four minutes of wall clock for a full guest purchase, unattended, with a result file at the end. The same journey done by hand costs a tester roughly the same time and produces nothing anyone can attach to a ticket.

Reading the evidence

You get a checkout regression test that anyone on the team can read and amend, with no page objects and no selector file to keep in sync with the theme.

The obvious follow-up is to run it on every deploy rather than on request. Kane CLI in CI covers the headless and agent flags plus the exit codes a pipeline reads, and the test.md format explains the front matter options used above.