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# Step 4: Check if a class is already booked

## What you gain

You learn to read the state of a button before acting: "Book Class", "Join Waitlist", "Booked" or "Waitlisted". A class that is already booked is not clicked again, and the bot prints a ✓ line that says what it did.

## Where it is in the code

`src/snack_and_lift/domain/rules.py`

## Screenshot

![Step 4: Check if a class is already booked](https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/049-snack-and-lift/raw/branch/main/docs/images/step-4.png)

> This image is an illustration: the bot ran against the project's local test pages (`tests/e2e/fixtures`), not against the live gym site. A run with a real account and `--screenshot-dir` (see [Getting started](Getting-Started)) replaces it.

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