C#•6d ago

Unit Test, TestInitialize alternative in xUnit

Hello guys, I read that [TestInitialize] is used in MSTest to initialize an object. My first question is why should we initialize it? I mean, it seems that we build an entire method to initialize it, why not initializing it in the test cases? Second thing, when each test cases is executed, the TestInitialize attribute creates a new instance for each case? The idea is we don't want shared data to affect our result? I read a bit and came across how we can mimic TestInitialize in xUnit:

C#
namespace Week7Lab.UnitTest;


using Week7Labs;
public class OrderProcessorTest : IDisposable
{
    private OrderProcessor _processor;

    public OrderProcessorTest()
    {
        _processor = new OrderProcessor();
    }
    [Fact]
    public void CalculateTotal_WithValidOrder_ReturnsCorrectTotal()
    {
        // Arrange
        var listOfItems = new Items[1];
        var it = new Items();
        var order = new Order();
        it.Quantity = 10;
        it.Price = 100;
        listOfItems[0] = it;
        order.Items = listOfItems;
        // Act
        var result = _processor.CalculateTotal(order);
        // Assert
        Assert.Equal(1000, result);
    }

    public void Dispose()
    {
        //
    }
}

C#
namespace Week7Lab.UnitTest;


using Week7Labs;
public class OrderProcessorTest : IDisposable
{
    private OrderProcessor _processor;

    public OrderProcessorTest()
    {
        _processor = new OrderProcessor();
    }
    [Fact]
    public void CalculateTotal_WithValidOrder_ReturnsCorrectTotal()
    {
        // Arrange
        var listOfItems = new Items[1];
        var it = new Items();
        var order = new Order();
        it.Quantity = 10;
        it.Price = 100;
        listOfItems[0] = it;
        order.Items = listOfItems;
        // Act
        var result = _processor.CalculateTotal(order);
        // Assert
        Assert.Equal(1000, result);
    }

    public void Dispose()
    {
        //
    }
}

I write something like this. Can anyone confirm whether the idea is correct please. Also, notice that we implement the IDisposable, why is it necessary here?

2 Replies

Sehra•6d ago

https://thomhurst.github.io/TUnit/docs/comparison/attributes has a comparison table, lifecycle hook attributes if you have lots of common things to initialize, you can mark a method and you don't have to call it yourself in each test

FakerOP•6d ago

yep I see

Gaming

Programming

Unit Test, TestInitialize alternative in xUnit

Did you find this page helpful?