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# valid-describe-callback

[Added in v0.3.4](https://github.com/web-infra-dev/rslint/releases/tag/v0.3.4)
## Configuration

| Preset                           | Configured Value |
| -------------------------------- | ---------------- |
| ✅ jestPlugin.configs.all         | `"error"`        |
| ✅ jestPlugin.configs.recommended | `"error"`        |


```ts title=rslint.config.ts
import { defineConfig, jestPlugin } from '@rslint/core';

export default defineConfig([
  jestPlugin.configs.recommended,
  {
    rules: {
      'jest/valid-describe-callback': 'error',
    },
  },
]);
```

## Rule Details

Enforce valid `describe()` callback usage in Jest. A `describe` block should include both a suite name and a callback function, the callback must not be `async`, should not take parameters (except in `describe.each(...)`), and should not return a value.

Examples of **incorrect** code for this rule:

```javascript
describe("suite");

describe("suite", "not a function");

describe("suite", async () => {
  await setup();
});

describe("suite", (done) => {
  done();
});

describe("suite", () => test("case", () => {}));
```

Examples of **correct** code for this rule:

```javascript
describe("suite", () => {
  test("case", () => {
    expect(true).toBe(true);
  });
});

describe.each([1, 2, 3])("value %s", (value) => {
  test("is truthy", () => {
    expect(value).toBeTruthy();
  });
});
```

## Original Documentation

- [eslint-plugin-jest: valid-describe-callback](https://github.com/jest-community/eslint-plugin-jest/blob/v29.16.0/docs/rules/valid-describe-callback.md)
- [Source code](https://github.com/jest-community/eslint-plugin-jest/blob/v29.16.0/src/rules/valid-describe-callback.ts)