Gain insights into using xUnit for TDD in .NET. Delve into fundamentals, advanced topics, mocking, the testing pyramid, and integration tests to develop high-quality software.

Test Driven development on .net and xunit.png

xunit.tar.gz

Basic Tests

Unit/Integration Tests

End-to-end Tests

Basic Tests with coverage

Unit/Integration Tests with coverage

Test-driven development (TDD) is a proven way of developing high-quality applications with clean and well-maintainable code. In this course, you will learn how to use the xUnit testing library to apply the principles of test-driven development on .NET.

You will start this course by reviewing the fundamentals of xUnit and how automated testing works on .NET. Then, you will practice the key TDD fundamentals. After this, you will move to more advanced topics, such as mocking, understanding the testing pyramid, running integration tests against hosted apps, etc.

By the end of the course, you will have learned how to develop high-quality software by following the TDD principles. You will also have learned how to use xUnit to write any automated tests supported by .NET.

Using xUnit for Test-Driven Development in .NET

import React from 'react';
import { shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';

configure({ adapter: new Adapter() });

import HelloWorld from './app';

var TestResult = function() {
    this.succeeded = false;
    this.reason = "";
    this.input = "";
    this.expected_output = "";
    this.actual_output = "";
}

export const executeTests = function() {

  var results = [];

  result = new TestResult();
  result.input = 'HelloWorld Component';
  result.expected_output = "span containing text 'Hello World'"

  let wrapper = shallow(<HelloWorld />);

  // Call your Challenge function here.

  let type = wrapper.type();
  let testSuccessful = true;
  let failureReason;

  if (type !== 'span') {
    testSuccessful = false;
    failureReason = "You need to render exactly one span HTML element";
  } else if (wrapper.props().children != "Hello World") {
     testSuccessful = false;
     failureReason = "You have rendered wrong message in your span element";
  }

  result.actual_output = wrapper.html();

  if (testSuccessful) {
    result.succeeded = true;
    result.reason = "Succeeded"
  } else {
    result.succeeded = false;
    result.reason = failureReason;
  }

  results.push(result);

  return results;
}


React

Dart

GoJS React

Typescript React

Vue.js

namespace MainApp;

public class FileLogger
{
    public const string LogFileName = "log.txt";

    public void WriteToLog(string? message)
    {
        if (string.IsNullOrWhiteSpace(message))
            return;

        using StreamWriter writer = new(LogFileName, true);
        writer.WriteLine(message);
    }
}

Introduction to Automated Testing

Test-Driven Development

Assertions as a Key Part of Automated Tests

Different Types of Automated Tests

Mocking External Dependencies

Working with Code Coverage Metrics

Summary

Appendix

The Importance of Setup and Teardown