PosInformatique.Moq.Analyzers

PosInfoMoq2006: The Protected().Setup() method must be use with overridable protected or internal methods

Property	Value
Rule ID	PosInfoMoq2006
Title	The Protected().Setup() method must be use with overridable protected or internal methods.
Category	Compilation
Default severity	Error

Cause

A Protected().Setup() reference a method in the mocked type which is:

• Not existing in the mocked type.
• Not overridable (abstract, virtual or override, but not sealed).
• Not protected or internal.

Rule description

When using the Protected().Setup(), the method mocked must be protected, internal or protected internal, and must be overridable (virtual, abstract and override, but not sealed).

[Fact]
public void Test()
{
    var service = new Mock<Service>();
    service.Protected().Setup("GetData")            // The GetData() is public and can't be mocked with Protected() feature.
        .Returns(10);
    service.Protected().Setup("NotExists")          // The NotExists() method does not exist.
        .Returns(10);
    service.Protected().Setup("YouCantOverrideMe")  // The YouCantOverrideMe() is not virtual or abstract.
        .Returns(10);
}

public abstract class Service
{
    public abstract int GetData();

    protected void YouCantOverrideMe() { };
}

How to fix violations

To fix a violation of this rule, use the Protected().Setup() to mock method which are:

• protected
• internal
• protected internal
• Overridable (virtual, abstract or override, but not sealed).

Else use the standard mocking feature without the Protected() method.

When to suppress warnings

Do not suppress an error from this rule. If bypassed, the execution of the unit test will be failed with a MoqException thrown with the “Method X.xxxx is public. Use strong-typed.” message.

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