Java is widely used for developing web applications and relies heavily on APIs (Application Programming Interfaces). Therefore, API testing is a critical practice, as it ensures seamless functionality, compatibility, security, and performance while facilitating integration and simplifying debugging.

As part of our efforts to improve the security of open-source software, we continuously test open-source projects with our JVM fuzzing engine Jazzer in Google’s OSS-Fuzz. One of our tests yielded a Denial of Service vulnerability in the Spring Framework (CVE-2023-20861). Spring is one of the most widely used frameworks for developing web applications in Java. As a result, vulnerabilities have an amplified impact on all applications that rely on the vulnerable version.

Unit testing is an important part of software development and is considered a crucial step in ensuring the quality and accuracy of the code. It helps in identifying bugs and issues early on in the development cycle, which ultimately results in delivering high-quality software. Java is renowned for being one of the most versatile languages in programming, and it offers a wide selection of unit testing frameworks and tools.

In this post, we will show how you can write fuzz tests for your JavaScript projects in Jest as easily as regular unit tests. To make this possible, we have added integration for Jazzer.js into Jest, which enables you to write fuzz tests using the familiar Jest API. Additionally, you get great IDE support with features such as debugging and test coverage reporting out-of-the-box. This integration enables a smooth user experience with the advanced fuzzing technology provided by Jazzer.js.

As vehicles are becoming increasingly dependent on software, automotive software teams are adopting CI/CD (continuous integration and continuous deployment/delivery). This enables them to build, test, and deploy code faster than ever while simultaneously reducing potential maintenance costs. In automotive projects, functional and security bugs can be highly consequential, especially if they are found in the later stages of software development or, even worse, after shipping.

Unit testing is a crucial aspect of software development and helps to ensure that individual units of code are working as intended. In Java, the most popular framework for unit testing is JUnit. In this article, we will go over the basics of how to write and run unit tests in Java using the popular testing framework, as well as some best practices for unit testing.

Most developers, including myself, have written unit tests before. Fuzz testing on the other hand has only started seeing widespread industry usage in recent years. Yet, some voices are already praising fuzz testing as the more effective approach, due to its ability to automatically generate negative and invalid test inputs. Let's put this claim to the test and see how these two approaches match up.