# U - Unit Under Test

It's the first section in the [name](https://blog.fiftywords.co/use).

It specifies which is the [unit](https://blog.fiftywords.co/unit-of-code) that we're currently testing.

The [unit](https://blog.fiftywords.co/unit-of-code) can be in the same text as the other sections or separated in a group if we're going to create multiple [unit tests](https://blog.fiftywords.co/unit-test) for the same [unit of code](https://blog.fiftywords.co/unit-of-code).

```ts
/** In this example the three sections of the name are in the same text.
 * The xxx refer to the other sections
 */
test("Airplane, xxx, xxx", () => {});

/** In this example the first section of the test name is in a group
 * because there will be multiple tests on the same unit.
 * The xxx refer to the other sections
 */
group("Airplane", () => {
  test("xxx, xxx", () => {});

  test("xxx, xxx", () => {});
});
```

[🇨🇴 Versión en Español](https://blog.cincuentapalabras.co/use-unidad-bajo-prueba)