PLAYWRIGHT CLI · CHECKED OCTOBER 15, 2026
The next run should answer one question.
After locating a difference, change one condition in your own staging app. Keep the browser observation, request record and email observation separate.
Write the expected outcome first
A useful verification-flow test can be stated precisely: a new non-sensitive test address submits the form; the app requests a verification message; the inbox receives one expected message; following its link confirms the intended staging account. These are four observations, not a single “signup passed” label.
| Evidence | Record | Do not infer |
|---|---|---|
| Form state | Visible success or error after submission | The email arrived |
| Request | Method, endpoint, status and repeated attempts | The server performed the intended business operation |
| Inbox | Message received and its relevant time | All providers or recipients can receive it |
| Verification | Expected staging account confirmed | Production migration or authentication is certified |
Check the browser-state explanation
If the difference might depend on a saved cookie, an existing login or a local profile, repeat the visible flow in a fresh test browser. WebTraceCheck is an optional browser tool for this manual check. You can also use an isolated browser you already control. Record which browser and application build you used, because a fresh session is not the same thing as an identical browser engine.
This step does not import a trace into WebTraceCheck, run Playwright there, or prove that browser state caused the difference. If the behavior changes, design the next experiment to isolate the specific state. Do not transfer your production login into a disposable session merely to make the examples match.
Check the message independently
For your own staging signup flow, CleanTempMail can provide a temporary test inbox when the application accepts disposable addresses. Use a fresh, non-sensitive test identity and manually observe receipt. Your existing test mailbox works too. The comparison tool does not call an email API or automatically verify delivery.
A request returning 200 means that an HTTP response was recorded. It does not establish that a message arrived, was rendered correctly, or contained the right link. If your app intentionally rejects disposable addresses, record that policy branch instead of bypassing it. Temporary inboxes are not suitable for important accounts, permanent recovery addresses or confidential messages.
Keep a small reproduction record
- Write the application build, expected outcome and the one changed condition.
- Start tracing before the first relevant interaction. Use your own app and test identity.
- Stop tracing after the expected state or the observed failure, including enough time for the request you intend to inspect.
- Import the matched files. Review the action alignment and preserve incomplete or unassigned observations.
- Export the useful intervals. Keep any mailbox observation in a separate note without including tokens or private message bodies.
- Repeat the experiment if the result is ambiguous. One successful follow-up does not establish a failure rate.
Both linked products share the operator of TracePair. They are optional steps, not dependencies of the comparison. Links contain fixed campaign labels only; no trace content or exported data is added to them. Privacy and product relationships describes this boundary.