Guides for testing
real user flows.

Engineering guidance for browser QA, payment and email integrations, release checks, and coding-agent workflows.

Browse all guides

Test Stripe checkout without charging a real card

Check payment records, callbacks, and account access with an authorized test environment or supported clone.

Read the guide
Payment and order checksExample
Payment provider02
Payment acceptedpayment_intent.succeeded state changed
Your application03
Order confirmedReceipt sent to test inboxorder_1042
Signed callbackWebhook received and verified

What are you trying to test?

Ask a specific question about your test. Get an answer with the guides and documentation behind it.

Open Ask Molar

Use a general question. Leave out passwords, private URLs and customer details.

Start with a question

Test an invoice download beyond the button click

Capture the download, save it before teardown, and check the invoice fields that matter. Includes a Playwright example and failure cases.

Read guide

Payment succeeded. Why is the account still locked?

A practical test plan for delayed payment webhooks, duplicate deliveries and the account access a paying customer expects.

Read guide

AI Playwright test generation: from a task to a reviewed test

How to review generated browser tests: locators, assertions, clean starting state, and repeatability in CI.

Read guide

Flaky tests: causes and fixes

Investigate timing races, shared data, changing environments, and unstable selectors before adding retries.

Read guide

Review automated test repairs without weakening assertions

How to evaluate a proposed locator change, preserve the intended behavior, and rerun the original assertion.

Read guide

End-to-end testing: practical habits for reliable checks

Choose important app tasks, stable locators, isolated test data, and useful failure recordings.

Read guide

Run Playwright tests in GitHub Actions

Configure test jobs, sharding, failure recordings, and required checks in GitHub Actions.

Read guide

Require passing checks before merging

Choose the GitHub checks that must pass, configure the requirement, and define how to handle an unreliable check.

Read guide

Check that important tasks still work in production

Choose browser checks, test accounts, schedules, and alerts for the application your customers use.

Read guide

Test SMS verification with captured messages

Configure a test SMS service, inspect the code, and check account verification, expiry, and retry behavior.

Read guide

Test email verification, invitations, and notifications

Check captured messages, recipients, links, codes, and expiry using a configured test inbox.

Read guide

API mocking vs stateful service clones

Compare configured API responses, stateful mocks, and supported service clones for integration testing.

Read guide

Choose which regression tests to run before release

Map changes to affected tasks, keep essential checks, and learn from regressions your tests missed.

Read guide

Test the third-party services behind your app

Choose test endpoints, isolate accounts and data, and inspect the callbacks that complete a customer task.

Read guide

Continuous testing in your CI/CD pipeline

Choose which tests to run during development, pull requests, deployment, and production monitoring.

Read guide

Make test environments easier to trust

Reduce configuration drift, isolate data, and choose appropriate test services for preview and staging environments.

Read guide

AI agents and the future of software testing

A practical guide to letting coding agents test their own changes in a browser, with deterministic checks where judgment matters.

Read guide

Test Stripe checkout without charging a real card

Check payment records, callbacks, and account access with an authorized test environment or supported clone.

Read guide

Plan tests before a change is ready to ship

Review acceptance criteria early and bring useful browser checks into the pull-request workflow.

Read guide

Playwright vs Cypress: choosing for your app

Evaluate browser navigation, CI execution, failure inspection, and test maintenance on a representative task.

Read guide

Startup QA without a dedicated QA team

Start with important customer tasks, build repeatable tests, and add release checks your team can maintain.

Read guide

Manage test data across local runs and CI

Use separate accounts, predictable starting data, and verified cleanup to prevent tests from interfering.

Read guide

Review visual changes without losing functional checks

Set useful screenshot scopes and baselines, control rendering variation, and review the behavior behind the page.

Read guide

23 guides

Try a check on a public page.

Enter a public URL and ask Molar to confirm a heading or text. Inspect the result and captured screenshot.

Free during the beta. No card.