docs: document MinimalLambda.Testing package and enhance testing guide

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <Version>2.0.0-beta.5</Version>
+    <Version>2.0.0-beta.6</Version>
     <!-- SPDX license identifier for MIT -->
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <!-- Other useful metadata -->

README.md

@@ -46,6 +46,7 @@ for building AWS Lambda functions.
 | [**MinimalLambda**](./src/MinimalLambda/README.md)                        | [![NuGet](https://img.shields.io/nuget/v/MinimalLambda.svg)](https://www.nuget.org/packages/MinimalLambda)                             | [![Downloads](https://img.shields.io/nuget/dt/MinimalLambda.svg)](https://www.nuget.org/packages/MinimalLambda/)                             |
 | [**MinimalLambda.Abstractions**](./src/MinimalLambda.Abstractions/README.md)   | [![NuGet](https://img.shields.io/nuget/v/MinimalLambda.Abstractions.svg)](https://www.nuget.org/packages/MinimalLambda.Abstractions)   | [![Downloads](https://img.shields.io/nuget/dt/MinimalLambda.Abstractions.svg)](https://www.nuget.org/packages/MinimalLambda.Abstractions/)   |
 | [**MinimalLambda.OpenTelemetry**](./src/MinimalLambda.OpenTelemetry/README.md) | [![NuGet](https://img.shields.io/nuget/v/MinimalLambda.OpenTelemetry.svg)](https://www.nuget.org/packages/MinimalLambda.OpenTelemetry) | [![Downloads](https://img.shields.io/nuget/dt/MinimalLambda.OpenTelemetry.svg)](https://www.nuget.org/packages/MinimalLambda.OpenTelemetry/) |
+| [**MinimalLambda.Testing**](./src/MinimalLambda.Testing/README.md) | [![NuGet](https://img.shields.io/nuget/v/MinimalLambda.Testing.svg)](https://www.nuget.org/packages/MinimalLambda.Testing) | [![Downloads](https://img.shields.io/nuget/dt/MinimalLambda.Testing.svg)](https://www.nuget.org/packages/MinimalLambda.Testing/) |
 
 ### Envelopes Packages
 
@@ -105,7 +106,8 @@ public class GreetingService : IGreetingService
 ```
 
 See the [examples directory](./examples/) for more complete examples, including middleware and
-OpenTelemetry integration.
+OpenTelemetry integration. For in-memory integration tests, use
+[MinimalLambda.Testing](./docs/guides/testing.md) (a `WebApplicationFactory`-style runtime shim).
 
 ## Documentation
 

docs/getting-started/index.md

@@ -28,6 +28,8 @@ Before you begin, ensure you have:
 - **[Installation](installation.md)** – Add the NuGet packages and configure your csproj.
 - **[Your First Lambda](first-lambda.md)** – Walk through a handler, DI setup, and local testing.
 - **[Core Concepts](core-concepts.md)** – Learn about the host lifecycle, middleware, and source generation.
+- **Testing** – For in-memory, `WebApplicationFactory`-style integration tests, see
+  [MinimalLambda.Testing](../guides/testing.md).
 
 Prefer to explore? Head directly to **[Guides](../guides/index.md)** or **[Examples](../examples/index.md)** for deeper dives.
 

docs/guides/index.md

@@ -101,6 +101,7 @@ Write comprehensive tests for your Lambda functions using xUnit, NSubstitute, an
 - Testing handlers and middleware
 - Integration testing
 - Test naming conventions
+ - In-memory end-to-end testing with `MinimalLambda.Testing` (`WebApplicationFactory`-style runtime shim)
 
 ## Learning Path