Pass data between flows

Flows that pass data between each other are called Hopper Flows in QA Wolf — the pattern for multi-user, multi-device, and multi-platform test scenarios.

Examples

Create a user, then log in as that user A common pattern: one flow creates a user and publishes credentials; a second flow logs in using those credentials.

// Flow 1: Create user (producer)
await page.goto("https://app.example.com/admin/users/new");
await page.fill('[name="email"]', "testuser@example.com");
await page.fill('[name="password"]', "hunter2");
await page.click('[type="submit"]');

setOutput("USER_EMAIL", "testuser@example.com", "USER_PASSWORD", "hunter2");

// Flow 2: Log in (consumer)
const email = inputs["USER_EMAIL"];
const password = inputs["USER_PASSWORD"];

await page.goto("https://app.example.com/login");
await page.fill('[name="email"]', email);
await page.fill('[name="password"]', password);
await page.click('[type="submit"]');

Create a user, log in, then verify activity Extend the chain: a third flow consumes the session token published by the login flow to verify downstream activity.

// Flow 1: Create user (producer)
setOutput("USER_EMAIL", "testuser@example.com", "USER_PASSWORD", "hunter2");

// Flow 2: Log in (producer + consumer)
const email = inputs["USER_EMAIL"];
const password = inputs["USER_PASSWORD"];

// ... log in ...
const token = await page.evaluate(() => localStorage.getItem("auth_token"));
setOutput("AUTH_TOKEN", token);

// Flow 3: Verify activity (consumer)
const token = inputs["AUTH_TOKEN"];

await page.setExtraHTTPHeaders({ Authorization: `Bearer ${token}` });
await page.goto("https://app.example.com/activity");
// ... assert expected activity ...

When to use

Your app has multi-step workflows that span separate user sessions.
Your test requires one user to create a resource another user acts on.
Your scenario involves multiple devices or platforms in a single run.
Your flow needs data that only exists after another flow has run.
Your test validates coordination between concurrent users or roles.

Notes

Key naming — Keys are uppercase by convention: AUTH_TOKEN, USER_EMAIL, USER_PASSWORD.
Overwrites — If the same flow calls setOutput multiple times, the last call wins for that key.
Conflicts — If two different flows publish the same key and a third flow depends on both, the run fails with Workflow run failed due to conflicting dependency outputs.
Execution order — A consumer will not run until its producer has published. Use Run Rules to enforce producer-before-consumer ordering.
Scheduling — Producers and consumers must be included in the same scheduled run. Target all flows or use a shared tag.

Email & SMS

Authentication

Networking

Data sharing

Audio

Camera

Accessibility

Performance

Visual diffing

AI & LLMs

Desktop

Sensors

Pass data between flows

Examples

When to use

Notes

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​When to use

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Examples

When to use

Notes