Java, Code Coverage: Scandals, Intrigues & Investigations • Evgeny Mandrikov • GOTO 2023

This presentation was recorded at GOTO Copenhagen 2023. #GOTOcon #GOTOcph https://gotocph.com Evgeny Mandrikov - Software Gardener, Language Team Technical Leader @EvgenyMandrikov ORIGINAL TALK TITLE Java, Code Coverage & Their Best Friend — Bytecode: Scandals, Intrigues, Investigations RESOURCES https://twitter.com/_Godin_ https://linkedin.com/in/mandrikov https://github.com/Godin https://sessionize.com/godin Links https://github.com/jacoco/jacoco https://github.com/openjdk/jdk/pull/3863#issuecomment-847711414 ABSTRACT Do you know what is inside of your class files? Are you ready to bet? Let's have fun by diving into bytecode pattern matching and explore how compilers and their different versions, from the old ones up to the most recent, transform your source code. Our dive will be based on details of the implementation of the most popular open-source code coverage tool for Java – JaCoCo ( https://www.jacoco.org/ ), which finds in bytecode and filters out various compiler generated artifacts, which otherwise require unnecessary and sometimes impossible tricks to have full code coverage. [...] TIMECODES 00:00 Intro 01:24 Java Code Coverage 05:33 Java 22:55 JaCoCo should ignore synthetic methods 45:45 Demo 49:56 Conclusion 52:52 Outro Read the full abstract here: https://gotocph.com/2023/sessions/2992 RECOMMENDED BOOKS Vijay SRJ • Java 21 New Features Simplified • https://amzn.to/3SugyRc Kevlin Henney & Trisha Gee • 97 Things Every Java Programmer Should Know • https://amzn.to/3kiTwJJ Joshua Bloch • Effective Java • https://amzn.to/3ygmQJt Jeff Scott Brown & Graeme Rocher • The Definitive Guide to Grails 2 • https://amzn.to/3DdcugY Todd Raymond Sharp • Introducing Micronaut • https://amzn.to/3pFvt0v Sanjay Patni • Pro RESTful APIs with Micronaut • https://amzn.to/43qekpp Nirmal Singh & Zack Dawood • Building Microservices with Micronaut • https://amzn.to/43mKfH5 https://twitter.com/GOTOcon https://www.linkedin.com/company/goto- https://www.instagram.com/goto_con https://www.facebook.com/GOTOConferences #Bytecode #Java #CodeCoverage #JaCoCo #JDK #JavaCodeCoverage #Enum #EmptyEnum #EvgenyMandrikov Looking for a unique learning experience? Attend the next GOTO conference near you! Get your ticket at https://gotopia.tech Sign up for updates and specials at https://gotopia.tech/newsletter SUBSCRIBE TO OUR CHANNEL - new videos posted almost daily. https://www.youtube.com/user/GotoConferences/?sub_confirmation=1