30 lines
735 B
Markdown
30 lines
735 B
Markdown
|
# Suggest using the built-in equality matchers (`prefer-equality-matcher`)
|
||
|
|
||
|
Jest has built-in matchers for expecting equality which allow for more readable
|
||
|
tests and error messages if an expectation fails.
|
||
|
|
||
|
## Rule details
|
||
|
|
||
|
This rule checks for _strict_ equality checks (`===` & `!==`) in tests that
|
||
|
could be replaced with one of the following built-in equality matchers:
|
||
|
|
||
|
- `toBe`
|
||
|
- `toEqual`
|
||
|
- `toStrictEqual`
|
||
|
|
||
|
Examples of **incorrect** code for this rule:
|
||
|
|
||
|
```js
|
||
|
expect(x === 5).toBe(true);
|
||
|
expect(name === 'Carl').not.toEqual(true);
|
||
|
expect(myObj !== thatObj).toStrictEqual(true);
|
||
|
```
|
||
|
|
||
|
Examples of **correct** code for this rule:
|
||
|
|
||
|
```js
|
||
|
expect(x).toBe(5);
|
||
|
expect(name).not.toEqual('Carl');
|
||
|
expect(myObj).toStrictEqual(thatObj);
|
||
|
```
|