Carolin Brandt



Software Developer

Incremental Just-In-Time Test Generation in Lock-Step with Code Development

SMILESENG Summer School
Full Publication Presentation Slides Permalink to here

On the SMILESENG Summer School 2022 in Córdoba, Spain, I presented my future work idea of generating test cases right while the developer is writing their production code. With the participants we discussed the open challenges to realize such a powerful tool.

I received the award for the “best new ideas and work in progress paper” at the summer school 😊

You can find the slides here. If you want to discuss any of the mentioned challenges, shoot me an email!


State-of-the-art test generation strategies employ advanced analyses of the code under test and powerful optimization algorithms to generate automatic test cases for software systems. As these techniques require a large amount of computational power, they are often limited to generating tests after the code under test is already written. However, today’s broad education about the importance of software testing lets developers strive to create test cases directly with new code they are contributing. To support these developers, we want to develop an incremental just-in-time test generation tool that works in close proximity to the development of the code under test. Whenever the developer creates a new class or functionality, the tool automatically proposes a matching test case. When the developer finishes implementing a new condition, the tool automatically recommends an additional test case that tests the code which was just added. The generated test cases are closely based on the existing test cases in the project with small, incremental changes to test the new lines of code. To realize such a just-in-time test generation tool we have to tackle many challenges: Detecting the completion of a test-worthy condition, generating a fitting test case in a short time on the developer’s machine, or effectively communicating the value of the new test case to the developer. With the participants of the SMILESENG Summer School we want discuss our new idea, brainstorm on the challenges that this research opens up and identify possible approaches to tackle them.


Software Testing · Automatic Test Generation · Test-Guided Development · Developer-Centric Design