add documentation

src/bunit.web/Extensions/StubComponentFactoryCollectionExtensions.cs

@@ -164,10 +164,18 @@ public static ComponentFactoryCollection AddStub(
 
 #if NET8_0_OR_GREATER
  /// <summary>
- /// TODO.
+ /// Marks a component as a stub component so that a stub gets generated for it. The stub has the same name as the component, but with the suffix "Stub" added.
  /// </summary>
+ /// <typeparam name="TComponent">The type of component to generate a stub for.</typeparam>
+ /// <remarks>
+ /// When <c>ComponentFactories.AddGeneratedStub&lt;MyButton&gt;()</c> is called, a stub component is generated for the component
+ /// with the name <c>MyButtonStub</c>. The stub component is added to the <see cref="ComponentFactoryCollection"/> and can be used.
+ /// It can also be retrieved via `cut.FindComponent&lt;MyButtonStub&gt;()`.
+ /// This call does the same as <c>ComponentFactories.Add&lt;MyButton, MyButtonStub&gt;()</c>.
+ /// </remarks>
 #pragma warning disable S2326
- public static ComponentFactoryCollection AddGeneratedStub<TComponent>(this ComponentFactoryCollection factories) where TComponent : IComponent
+ public static ComponentFactoryCollection AddGeneratedStub<TComponent>(this ComponentFactoryCollection factories)
+ where TComponent : IComponent
 #pragma warning restore S2326
  {
  if (factories is null)