# RecordingOptions (/docs/api/core-testing/interfaces/RecordingOptions)



## Properties [#properties]

### id? [#id]

```ts
optional id?: (request, index) => string;
```

The `id` written on each line. Defaults to the 1-based call index.

#### Parameters [#parameters]

| Parameter | Type                                                             |
| --------- | ---------------------------------------------------------------- |
| `request` | [`SystemOneRequest`](/docs/api/core/interfaces/SystemOneRequest) |
| `index`   | `number`                                                         |

#### Returns [#returns]

`string`

***

### now? [#now]

```ts
optional now?: () => Date;
```

#### Returns [#returns-1]

`Date`