Document protected member support

[Copilot]

Mockolate supports setting up and verifying protected members on class mocks, but the API was undocumented. This adds documentation for the .Protected accessor across setup and verification scenarios.

Changes

• README.md: Added "Working with Protected Members" section under Setup, and "Protected Members" section under Verify interactions
• Docs/pages/02-setup.md: Added protected member setup documentation
• Docs/pages/04-verify-interactions.md: Added protected member verification documentation

Usage

public abstract class ChocolateDispenser
{
    protected virtual bool DispenseInternal(string type, int amount) => true;
    protected virtual int InternalStock { get; set; }
}

var sut = Mock.Create<ChocolateDispenser>();

// Setup
sut.SetupMock.Protected.Method.DispenseInternal(
    It.Is("Dark"), It.IsAny<int>())
    .Returns(true);

sut.SetupMock.Protected.Property.InternalStock.InitializeWith(100);

// Verify
sut.VerifyMock.Invoked.Protected.DispenseInternal(
    It.Is("Dark"), It.IsAny<int>()).Once();

sut.VerifyMock.Got.Protected.InternalStock().AtLeastOnce();

All setup options (.Returns(), .Throws(), .Do()) and verification options work with protected members. Protected indexers use .Protected.Indexer() for setup and .GotProtectedIndexer()/.SetProtectedIndexer() for verification.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Document protected member support</issue_title>
<issue_description>## Description

Mockolate supports setting up and verifying protected members, but this is completely undocumented.

Missing Documentation

• SetupMock.Protected.Method() and .Property()
• VerifyMock.Protected.Invoked(), .Got(), .Set()
• Examples of working with protected methods and properties

Suggested Documentation

Add a new section titled "Working with Protected Members":

### Working with Protected Members

Mockolate allows you to setup and verify protected methods and properties:

```csharp
var sut = Mock.Create<MyChocolateDispenser>();

// Setup protected method
sut.SetupMock.Protected.Method(\"DispenseInternal\",
    It.Is(\"Dark\"), It.IsAny<int>())
    .Returns(true);

// Setup protected property
sut.SetupMock.Protected.Property(\"InternalStock\").InitializeWith(100);

// Verify protected method was called
sut.VerifyMock.Protected.Invoked(\"DispenseInternal\",
    It.Is(\"Dark\"), It.IsAny<int>()).Once();

// Verify protected property was accessed
sut.VerifyMock.Protected.Got(\"InternalStock\").AtLeastOnce();

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

• Fixes Document protected member support #417

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[vbreuss]

Obsolete by #432