What tools and approaches do you use when developing test scenarios?

When developing test scenarios in C#, the following tools and approaches are usually used:

• Unit testing frameworks: NUnit, xUnit, MSTest. They allow structuring tests, running them, and generating reports.

• Dependency mocking: using libraries like Moq, NSubstitute, or FakeItEasy to create mock objects to isolate the code under test.

• Parameterized tests: enable running a single test with different input data.

• BDD approach (Behavior Driven Development): using SpecFlow to describe scenarios in natural language.

• Testing exceptions and boundary conditions: verifying that the code correctly handles errors and edge cases.

• Automation and integration with CI/CD: running tests on each commit for quick regression detection.

Example of a simple test with NUnit:

using NUnit.Framework;

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

This approach helps create reliable, maintainable, and understandable tests.