How to migrate from Moq to NSubstitute

Seamless Migration from Moq to NSubstitute

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Table of contents

• Basic Migration Steps
• Advanced Concepts
• Migration with Find/Replace

Basic Migration Steps:

Step 1: Install NSubstitute Package

Begin by installing the NSubstitute NuGet package into your project. You can do this via the NuGet Package Manager Console or the Visual Studio NuGet Package Manager.

Install-Package NSubstitute

Step 2: Replace Moq Imports

Update your test classes to use the NSubstitute namespace instead of Moq:

using NSubstitute;
// using Moq; (Remove this line)

Step 3: Creating Mocks

NSubstitute provides a Substitute class to create substitutes (mocks) for your classes and interfaces. Replace your Moq mock setup with NSubstitute syntax:

Moq:

var mockService = new Mock<IService>();
mockService.Setup(s => s.Method()).Returns(result)…