How to unit test a .NET Core project using xUnit

Basically the same instructions as given in the Microsoft site, which I attempt to make yet simpler for the beginner to get started. Another useful link: https://xunit.net/docs/getting-started/netfx/visual-studio#write-first-tests Step 1: Create a directory for the test project Create a new directory for the test project. Navigate to that directory Create a new solution using the command: dotnet new sln Step 2: Create a new class library In the current directory create a new folder called Example. Navigate to the directory Example and run the command to create a new class library: dotnet new classlib. Step 3: Create an example test class Rename Class1.cs to Example.cs. Update the code in Example.cs to produce a function to test if an integer is even: [code language="csharp"] using System; namespace Example { public class ExampleService { public bool IsEven(int val) { return val % 2 == 0; } } } [/code] Step 4: Create the test project Navigate to the main directory UnitTestXunit. At the command prompt, create a new directory called Example.Tests. Navigate to that directory. Create a new test project: dotnet new xunit: Step 5: Add the required references to the test project Add the Example class library that was created previously as another dependency to the project. At the command prompt enter: dotnet add reference ../Example/Example.csproj Step 6: Add the test project to the solution: Navigate to the main directory UnitTestXunit. Add the test project to the solution by running the command: dotnet sln add ./Example.Tests/Example.Tests.csproj Step 7: Create the tests In the Example.Tests directory modify UnitTest.cs as follows ( you can rename this file if you wish) [code language="csharp"] using System; using Xunit; namespace Example.Tests { public class Example_IsEvenShould { private readonly ExampleService _example; public Example_IsEvenShould() { _example = new ExampleService(); } [Fact] public void ReturnFalseGivenValueOf1() { var result = _example.IsEven(1); Assert.False(result, "1 should not be even"); } } } [/code] Step 8: Run the tests Navigate to the main directory UnitTestXunit. Run the command dotnet test: To run the tests in Visual Studio Select Test > Windows > Test Explorer: Right-click Example.Tests and select Run Selected Tests:

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