# ava/use-true-false

📝 Prefer `t.true()`/`t.false()` over `t.truthy()`/`t.falsy()`.

💼 This rule is enabled in the ✅ `recommended` [config](https://github.com/avajs/eslint-plugin-ava#recommended-config).

🔧 This rule is automatically fixable by the [`--fix` CLI option](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix).

<!-- end auto-generated rule header -->

Translations: [Français](https://github.com/avajs/ava-docs/blob/main/fr_FR/related/eslint-plugin-ava/docs/rules/use-true-false.md)

`t.true()` and `t.false()` are stricter in their checks than `t.truthy()` and `t.falsy()`.
For example: if you have a function `foo()` which normally returns `true`, but suddenly returns `1` instead, `t.truthy(foo())` would not catch the change, but `t.true(foo())` would.
This rule enforces the use of the former when the tested expression is known to result in a boolean value.

This rule also enforces `t.true(x)` over `t.is(x, true)` and `t.false(x)` over `t.is(x, false)`.

## Examples

```js
import test from 'ava';

test('foo', t => {
	t.truthy(value < 2); // ❌
	t.true(value < 2); // ✅

	t.truthy(value === 1); // ❌
	t.true(value === 1); // ✅

	t.truthy([1, 2, 3].includes(value)); // ❌
	t.true([1, 2, 3].includes(value)); // ✅

	t.falsy(!value); // ❌
	t.false(!value); // ✅

	t.truthy(!!value); // ❌
	t.true(!!value); // ✅

	t.truthy(Array.isArray(value)); // ❌
	t.true(Array.isArray(value)); // ✅

	t.is(value, true); // ❌
	t.true(value); // ✅

	t.is(value, false); // ❌
	t.false(value); // ✅
});
```