Code Coverage Revised

EclEmmaon JaCoCo

Evgeny Mandrikov

Code quality

1 of 7 deadly sins of developer

Insufficient code coverage by tests

http://sonarsource.com

Untested Code is theDark Matter of Software

Robert (Uncle Bob) MartinAugust 2006

Apparently because itmakes up 90% of the software universe

Correctness

Completeness

AppTest

RequirementsA Library

FrameworkAgnostic

Tested

Scalable

Freaking Fast

Freaking Easy

Runtime profiling Instrumentation

Bytecode

On-The-Fly

Java Agent

Source

Offline

Class LoaderReplace Inject

Code Coverage

ALOAD probearrayICONST probeidICONST_1BASTORE

Java Byte Code Instrumentation

*.exec

Java Agent$ java -javaagent:jacocoagent.jar killerApp

Emma Cobertura Clover JaCoCo

License CPL GPL Commercial EPL

Latest release 13/06/2005 03/03/2010 25/04/2012 19/04/2012

Type offlinebytecode

offlinebytecode

offlinesource code

onlinebytecode

Java 1.2 — 1.6 1.3 — 1.6 1.4 — 1.7 1.5 — 1.7

Line hits partial yes yes partial

Branch coverage

no yes yes yes

Comparison

Comparison

IntegrationsAnt

MavenEclipse

SonarIntelliJ IDEA

SBTGUIDancer

Aquillian

MetricsTypes

MethodsLines

InstructionsBranches

Complexity

Plug-in Testing

No moreWorkspace Rebuilds!

Incremental Code Coverage

Intermediate Dumps

Fight Dark MatterIn Your Software!

Showcases

Future

Inject into a running JVM (Java 6)

Determine relationship code - test

Filters

Even faster with JSR 292 (Java 7)

Contribute

http://jacoco.org

?