# `epic-web/prefer-dispose-in-tests`

Prefer disposable setup (`using`/`await using` with `dispose`/`disposeAsync`)
instead of `beforeEach`/`afterEach`/`beforeAll`/`afterAll` when cleanup can
reasonably live in each test body.

This rule is enabled as `warn` in test files by the shared Oxlint config.

## Runtime behavior

This rule is authored as an Oxlint JS plugin rule using Oxlint's optimized
`createOnce` + `before` flow.

## Why

Disposable test setup keeps setup and cleanup in the same lexical scope and
reduces hidden global lifecycle behavior in flat tests.

## What it reports

The rule reports lifecycle hooks that can usually be moved to disposable setup
inside each test.

## What it intentionally allows

To avoid noisy false positives, the rule skips reporting when disposable
refactors are often not straightforward:

- setup files with hooks but no colocated tests
- hooks that use callback params (for example, `done`) or `this`
- hooks that mutate shared outer state
- common framework-level timer/mock lifecycle hooks
- suite-level shared setup in larger suites

## Options

```js
{
	allowKnownFrameworkHooks: true,
	minimumTestsForSuiteHooks: 2,
}
```

- `allowKnownFrameworkHooks` (boolean, default `true`)
  - Allows known framework lifecycle calls like `vi.useFakeTimers()`.
- `minimumTestsForSuiteHooks` (integer, default `2`)
  - Minimum test count before suite-level shared hooks are considered
    reasonable.

## Example override

```json
{
	"plugins": ["import", "react", "typescript", "vitest"],
	"jsPlugins": [
		"./node_modules/@epic-web/config/lint-rules/epic-web-plugin.js"
	],
	"overrides": [
		{
			"files": ["**/*.test.*", "**/*.spec.*"],
			"rules": {
				"epic-web/prefer-dispose-in-tests": [
					"warn",
					{ "minimumTestsForSuiteHooks": 3 }
				]
			}
		}
	]
}
```

## Source files

- implementation: [`prefer-dispose-in-tests.js`](./prefer-dispose-in-tests.js)