# DovetailDistributedApplicationTestingHelpers Methods

- Package: [Joinery.Dovetail.Aspire.Testing](/Dovetail/api/joinery.dovetail.aspire.testing.md)
- Type: [DovetailDistributedApplicationTestingHelpers](/Dovetail/api/joinery.dovetail.aspire.testing/dovetaildistributedapplicationtestinghelpers.md)
- Kind: `Methods`
- Members: `1`

Shared helpers used to wire an `Testing.IDistributedApplicationTestingBuilder` up to a Dovetail `Dovetail.IDovetailContext`. Not intended to be called directly by consumers; hidden from IntelliSense via `EditorBrowsableState.Never`.

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## Configure(IDistributedApplicationTestingBuilder, DovetailContextBuilder, CancellationToken)

- Name: `Configure(IDistributedApplicationTestingBuilder, DovetailContextBuilder, CancellationToken)`
- Modifiers: `static`
- Returns: `ValueTask<DistributedApplication>`

Populates the context, applies shared configuration, and builds the distributed application test host.

```csharp
public static class DovetailDistributedApplicationTestingHelpers
{
    public static ValueTask<DistributedApplication> Configure(
        IDistributedApplicationTestingBuilder builder,
        DovetailContextBuilder contextBuilder,
        CancellationToken cancellationToken)
    {
        // ...
    }
}
```

## Parameters

- `builder` (`IDistributedApplicationTestingBuilder`)
  The distributed application testing builder to configure.
- `contextBuilder` (`DovetailContextBuilder`)
  The context builder used to create the `Dovetail.IDovetailContext`.
- `cancellationToken` (`CancellationToken`)
  The cancellation token used while applying configuration and building the host.

## Returns

`ValueTask<DistributedApplication>` -- The built and configured `Hosting.DistributedApplication` test host.

## Exceptions

- `ArgumentNullException` -- `builder` or `contextBuilder` is `null`.