---
title: testutil.yield() function
description: testutil.yield() is the identity function.
url: https://docs.influxdata.com/flux/v0/stdlib/internal/testutil/yield/
estimated_tokens: 233
product: Flux
version: v0
---

# testutil.yield() function

-   Flux 0.68.0+
-   View InfluxDB support

`testutil.yield()` is the identity function.

##### Function type signature

```js
(<-v: A) => A
```

For more information, see [Function type signatures](/flux/v0/function-type-signatures/).

## Parameters

### v

Any value.