Testing Java Archives - Mastertheboss

Getting Started with Testcontainers for Java

12 June 2023 by F.Marchioni

Introduction In modern software development, it is crucial to write robust and reliable tests to ensure the quality of your applications. One essential aspect of testing is dealing with dependencies, such as databases or external services. Testcontainers is an excellent Java library that provides lightweight, disposable containers for running dependencies during tests. In this tutorial, … Read more

How to Test Private Methods with JUnit

8 June 20238 April 2023 by F.Marchioni

When writing unit tests, the best practice is to test public methods, as they are the entry points to your classes and provide the intended behavior to external consumers. Testing private methods, on the other hand, is often considered an implementation detail and not directly exposed to the external API. In this article, we will discuss why testing private methods is not generally a good option and explore an approach to test them using JUnit 5.

Debugging RestAssured Tests

24 March 2023 by F.Marchioni

When you run REST Assured tests, you may encounter errors such as failing assertions, incorrect responses, or unexpected behaviors. This article explains some techniques that can help you identify the root cause of these errors and fix them quickly. By debugging your tests, you can see what’s happening under the hood and find the issues that are causing the test failures.

JUnit 5 Cheatsheet (2023)

16 June 202311 March 2023 by F.Marchioni

junit cheatsheet

This article contains a JUnit 5 Cheatsheet which you can use as handy reference to build your JUnit 5 Jupiter Tests in Java.

JUnit Testing Best Practices: Verifying No Exceptions in Your Java Code

29 April 202328 February 2023 by F.Marchioni

Introduction When writing tests in Java, it’s important to verify that a method or code block behaves as expected. One of the most common things to check is whether an exception is thrown during the execution of a test. However, sometimes we also want to verify that no exception is thrown. This can be particularly … Read more

How to use Mockito to supercharge your Java Testing

22 February 2023 by F.Marchioni

Mockito is a powerful and easy-to-use mocking framework for Java applications. With Mockito, you can easily create mock objects that simulate the behavior of real objects in your application, without actually invoking their methods. We will show at first how to plug Mockito in JUnit Tests. Then, we will integrate Mockito in Quarkus Tests.

How to wait in Java with Awaitility

12 January 2023 by F.Marchioni

The Awaitility library introduces a functional style usage to express expectations of an asynchronous system in a concise and easy to read manner. Let’s have a deep dive into it with this tutorial.

JUnit 5 Made Easy

11 January 2023 by F.Marchioni

JUnit 5 is a powerful testing framework for Java developers, allowing you to write and run repeatable, automated tests for your code. With its clear and expressive syntax, JUnit 5 makes it easy to write tests for a wide range of scenarios and use cases, from simple unit tests to complex integration tests. In this beginner’s tutorial, we’ll cover the basics of JUnit 5 and walk through the steps of writing and running your first test.

How to assert Exceptions in JUnit

11 January 20234 January 2023 by F.Marchioni

JUnit 5 provides several ways to assert that a certain exception is thrown in a @Test method. In this tutorial, we will show you how to use assert Exceptions using JUnit5 and JUnit4 Tests.

Getting started with TestNG

3 February 20224 August 2021 by F.Marchioni

TestNG is a testing framework inspired by JUnit but introducing a whole set of new functionalities. In this tutorial we will walk through the set up and execution of some example tests with TestNG.