---
title: testutil.yield() function
description: >
  `testutil.yield()` is the identity function.
menu:
  flux_v0_ref:
    name: testutil.yield
    parent: internal/testutil
    identifier: internal/testutil/yield
weight: 201
---

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



##### Function type signature

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

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

## Parameters

### v

Any value.