source: frontend/node_modules/eslint-plugin-jest/docs/rules/consistent-test-it.md

# Have control over `test` and `it` usages (`consistent-test-it`)

Jest allows you to choose how you want to define your tests, using the `it` or
the `test` keywords, with multiple permutations for each:

- **it:** `it`, `xit`, `fit`, `it.only`, `it.skip`.
- **test:** `test`, `xtest`, `test.only`, `test.skip`.

This rule gives you control over the usage of these keywords in your codebase.

## Rule Details

This rule can be configured as follows

```json5
{
  type: 'object',
  properties: {
    fn: {
      enum: ['it', 'test'],
    },
    withinDescribe: {
      enum: ['it', 'test'],
    },
  },
  additionalProperties: false,
}
```

#### fn

Decides whether to use `test` or `it`.

#### withinDescribe

Decides whether to use `test` or `it` within a `describe` scope.

```js
/*eslint jest/consistent-test-it: ["error", {"fn": "test"}]*/

test('foo'); // valid
test.only('foo'); // valid

it('foo'); // invalid
it.only('foo'); // invalid
```

```js
/*eslint jest/consistent-test-it: ["error", {"fn": "it"}]*/

it('foo'); // valid
it.only('foo'); // valid

test('foo'); // invalid
test.only('foo'); // invalid
```

```js
/*eslint jest/consistent-test-it: ["error", {"fn": "it", "withinDescribe": "test"}]*/

it('foo'); // valid
describe('foo', function () {
  test('bar'); // valid
});

test('foo'); // invalid
describe('foo', function () {
  it('bar'); // invalid
});
```

### Default configuration

The default configuration forces all top-level tests to use `test` and all tests
nested within `describe` to use `it`.

```js
/*eslint jest/consistent-test-it: ["error"]*/

test('foo'); // valid
describe('foo', function () {
  it('bar'); // valid
});

it('foo'); // invalid
describe('foo', function () {
  test('bar'); // invalid
});
```