moq

name	moq
description	Guidance for Moq mocking framework for .NET unit testing. USE FOR: creating mock objects for interfaces, stubbing method return values, verifying method invocations, argument matching and capture, testing code in isolation from dependencies, simulating exceptions and async behavior in unit tests. DO NOT USE FOR: integration testing with real dependencies (use Testcontainers), mocking static methods or sealed classes (use shims or wrappers), or end-to-end testing.
license	MIT
metadata	{"displayName":"Moq","author":"Tyler-R-Kendrick","version":"1.0.0"}
compatibility	["claude","copilot","cursor"]
references	[{"title":"Moq GitHub Repository","url":"https://github.com/devlooped/moq"},{"title":"Moq Quickstart Guide","url":"https://github.com/devlooped/moq/wiki/Quickstart"},{"title":"Moq NuGet Package","url":"https://www.nuget.org/packages/Moq"}]

Moq

Overview

Moq is the most widely used mocking framework for .NET unit testing. It creates test doubles (mocks) for interfaces and virtual methods, allowing you to isolate the code under test from its dependencies. Moq uses a fluent API for setting up return values, throwing exceptions, raising events, and verifying that specific methods were called with expected arguments. It works with all major .NET test frameworks (xUnit, NUnit, MSTest) and integrates with AutoFixture via AutoMoqCustomization for fully automated test setup.