---
title: "assert"
sidebarTitle: "assert"
description: "Validate conditions during a test using the assert command."
icon: "check"
mode: "wide"
---

import Replay from "/snippets/tests/assert-replay.mdx";
import Example from "/snippets/tests/assert-yaml.mdx";

<Replay />
<Example />

## Description

The `assert` command validates that a specific condition is true. It ensures that a task completed successfully by checking the screen for the expected outcome. If the condition isn't met, the test will fail.

## Arguments

| Argument | Type      | Description                                                                                                        |
| -------- | --------- | ------------------------------------------------------------------------------------------------------------------ |
| `expect` | `string`  | The condition to check. This should describe what you expect to see on the screen.                                 |
| `async`  | `boolean` | (Optional) If set to `true`, the test will continue without waiting for the assertion to pass. Default is `false`. |
| `invert` | `boolean` | (Optional) If set to `true`, will fail if the assertion passes.                                                    |

## Example usage

```yaml
command: assert
expect: the video is playing
```

### Example with `async`

```yaml
command: assert
expect: There is no error message
async: true
```

## Notes

- Use `async: true` to speed up tests by allowing non-blocking assertions. However, the test will still fail if the condition isn't met.
- Ensure the `expect` string clearly describes the condition to avoid ambiguity.