# Disallow using `toBeTruthy()` & `toBeFalsy()` (no-truthy-falsy)

Tests against boolean values should assert true or false. Asserting `toBeTruthy`
or `toBeFalsy` matches non-boolean values as well and encourages weaker tests.

For example, `expect(someBoolean).toBeFalsy()` passes when
`someBoolean === null`, and when `someBoolean === false`.

Similarly, `expect(someBoolean).toBeTruthy()` passes when `someBoolean === []`,
and when `someBoolean === 'false'` (note that `'false'` is a string).

## Rule details

This rule triggers a warning if `toBeTruthy()` or `toBeFalsy()` are used.

This rule is disabled by default.

### Default configuration

The following patterns are considered warnings:

```js
expect(someValue).toBeTruthy();
expect(someValue).toBeFalsy();
```

The following patterns are not considered warnings:

```js
expect(someValue).toBe(true);
expect(someValue).toBe(false);
```