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Code Coverage Revised : EclEmma on JaCoCo
This document discusses code coverage tools and JaCoCo in particular. It summarizes that JaCoCo is an open-source Java code coverage library that collects execution data for Java applications and libraries. JaCoCo can collect data both offline from Java byte code or online by instrumenting Java applications dynamically. The document compares JaCoCo to other code coverage tools and outlines JaCoCo's integrations, metrics, and features to help developers test code coverage.
In this document
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Introduction to code coverage tools EclEmma and JaCoCo, emphasizing code quality issues stemming from insufficient test coverage.
Highlights the significance of correctness and completeness in testing applications and the need for robust frameworks.
Discussion on Java byte code instrumentation techniques using runtime profiling and class loader mechanisms.
Comparison of various coverage tools like Emma, Cobertura, Clover, and JaCoCo, focusing on features and licensing.
Overview of integrations with popular development tools such as Ant, Maven, Eclipse, and others.
Identifying metrics for measuring code coverage including methods, lines, and complexity, emphasizing incremental coverage.
Insights into future enhancements in code coverage such as faster integration and JVM injection strategies.
Call to action for contributing to the JaCoCo project through the website.
Code Coverage Revised : EclEmma on JaCoCo
- 1. Code Coverage Revised EclEmma on JaCoCo Evgeny Mandrikov
- 2. Code quality 1 of 7 deadly sins of developer Insufficient code coverage by tests http://sonarsource.com
- 3. Untested Code isthe Dark Matter of Software Apparently because it makes up 90% of the software universe Robert (Uncle Bob) Martin August 2006
- 4. Correctness Test App Completeness
- 7. Requirements A Library Tested Framework Agnostic Scalable Freaking Fast Freaking Easy
- 8. Code Coverage Runtime profiling Instrumentation Source Bytecode Offline On-The-Fly Replace Inject Class Loader Java Agent
- 9. Java Byte Code Instrumentation ALOAD probearray ICONST probeid ICONST_1 BASTORE
- 10. Java Agent $ java-javaagent:jacocoagent.jar killerApp *.exec
- 11. Comparison Emma Cobertura Clover JaCoCo License CPL GPL Commercial EPL Latest release 13/06/2005 03/03/2010 25/04/2012 19/04/2012 Type offline offline offline online bytecode bytecode source code bytecode Java 1.2 — 1.6 1.3 — 1.6 1.4 — 1.7 1.5 — 1.7 Line hits partial yes yes partial Branch no yes yes yes coverage
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- 13. Integrations Ant Eclipse Maven Sonar IntelliJ IDEA Aquillian GUIDancer SBT
- 15. Metrics Types Methods Lines Instructions Branches Complexity
- 16. Plug-in Testing No more WorkspaceRebuilds!
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- 18. Showcases Fight Dark Matter In Your Software!
- 19. Future Determine relationship code- test Even faster with JSR 292 (Java 7) Filters Inject into a running JVM (Java 6)
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