# FieldCodecTester<TValue, TCodec>.FieldCodecTester<TValue, TCodec>(ITestOutputHelper)

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.serialization.testkit/orleans.serialization.testkit.fieldcodectester-2/) | [Constructors](/orleans/docs/api/csharp/microsoft.orleans.serialization.testkit/orleans.serialization.testkit.fieldcodectester-2/constructors/)

[Source](https://github.com/dotnet/orleans/blob/1644940b035c7bdf215a4fd7135757c06bcfe9ec/src/Orleans.Serialization.TestKit/FieldCodecTester.cs#L41-L44)

```csharp
protected FieldCodecTester<TValue, FieldCodecTester(ITestOutputHelper output)
```

Initializes a new instance of the `Orleans.Serialization.TestKit.FieldCodecTester-2` class.

### Parameters

- `output` (`ITestOutputHelper`)

### Exceptions

- `System.ArgumentNullException`: `output` is `null`.