What are some examples of TDD in C#?

What are some examples of TDD in C#?

Test-Driven Development (TDD) in C# involves writing tests before the actual code. For example, you might start with a simple test for a calculator's addition method.

Can you show me a code example for that?

Sure! Here's a simple example:

using NUnit.Framework;

[TestFixture]
public class CalculatorTests
{
    [Test]
    public void Add_TwoNumbers_ReturnsSum()
    {
        var calculator = new Calculator();
        var result = calculator.Add(2, 3);
        Assert.AreEqual(5, result);
    }
}

This test checks if the Add method returns the correct sum.

What if I want to test for subtraction?

You would write a similar test for the subtraction method. Here's an example:

[Test]
public void Subtract_TwoNumbers_ReturnsDifference()
{
    var calculator = new Calculator();
    var result = calculator.Subtract(5, 3);
    Assert.AreEqual(2, result);
}

This ensures that the Subtract method works as expected.

How do I implement the Calculator class?

Here's a simple implementation of the Calculator class:

public class Calculator
{
    public int Add(int a, int b) => a + b;
    public int Subtract(int a, int b) => a - b;
}

This class provides basic addition and subtraction methods.