Pitest (aka PIT) is a state of the art mutation testing system for Java and the JVM.

Read all about it at http://pitest.org

• Switch version numbering scheme
• Upgrade to ASM 5.0.2
• Fix for #114 - fails to run for java 8 when -parameters flag is set
• #99 Support additionalClasspathElements property in maven plugin (thanks artspb)
• #98 Do not mutate java 7 try with resources (thanks @artspb)
• #109 extended remove conditional mutator (thanks @vrthra)

• Move to Github
• Upgrade of ASM to support Java 8 bytecode (thanks to "iirekm")
• Partial support for JUnit categories (thanks to "chrisr")
• New Remove Increments Mutator (thanks to Rahul Gopinath)
• Minor logging improvements (thanks to Kyle Rogers aka Stephan Penndorf)
• Fix for #92 - broken maven 2 support
• Fix for #75 - incorrectly ignored tests in classes with both @Ignore and @BeforeClass / @AfterClass

• restores java 7 compatibility
• new remove conditionals mutator
• support for mutating static initializers with TestNG
• properly isolate classpaths when running via Ant
• break builds on coverage threshold
• allow JVM to be specified
• support user defined test selection strategies
• support user defined output format
• support user defined test prioritisation
• fix for issue blocking usage with Robolectric

Note, setup for Ant based projects changes in this release. See ant setup for details on usage.

• Maven 2 compatibility restored
• Much faster line coverage calculation
• Fix for #78 - Error when PowerMockito test stores mock as member

This release also changes a number of internal implementation details, some of which may be of interest/importance to those maintaining tools that integrate with PIT.

Mutations are now scoped internally as described in https://groups.google.com/forum/#!topic/pitusers/E0-3QZuMYjE

A new class (org.pitest.mutationtest.tooling.EntryPoint) has been introduced that removes some of the duplication that existed in the various ways of launching mutation analysis.

• Support for parametrized Spock tests
• Support for JUnitParams tests
• Fix for #73 - JUnit parameterised tests calling mutee during setup failing during mutation phase
• Fix to #63 - ant task fails when empty options supplied
• Ability to override maven options from command line
• Ability to fail a build if it does not achieve a given mutation score
• Performance improvement when tests use @BeforeClass or @AfterClass annotations
• Slightly improved scheduling over multiple threads
• Improved maven multi project support
• Integration with source control for maven users

• Incremental analysis (--historyInputLocation and --historyOutputLocation)
• Inlined code detection turned on by default
• Quieter loggging by default
• Improved Java 7 support
• Upgrade of ASM from 3.3 to 4
• Fix for concurrency issues during coverage collection
• Fix for #53 - problems with snapshot junit versions
• Fix for #59 - duplicate dependencies set via maven

• Inlined finally block detection (--detectInlinedCode)
• New experimental switch statement mutator (contributed by Chris Rimmer)
• Do not mutate Groovy classes
• Fix for #33 - set user.dir to match surefire
• Fix for #43 - optionally suppress timestamped folders (--timestampedReports=true/false)
• Fix for #44 - concurrent modification exception when gathering coverage
• Fix for #46 - incorrect setting of flags by ant task
• Smaller memory footprint for main process
• Faster coverage gathering for large codebases
• Faster classpath scanning for large codebases
• Support for JUnit 3 suite methods
• Fixes for incorrect detection of JUnit 3 tests

Known issue - Fix for #33 may not resolve issue for maven 2 users.

Detection of Groovy code has not yet been tested with Groovy 2 which may generate substantially different byte code to earlier versions.

• Much prettier reports
• Now avoids mutating assert statements
• Removed inScopeClasses option - use targetClasses and targetTests instead
• Fix for 100% CPU usage when child JVM crashes
• Fix for #35 #38 - experimental member variable mutator now corrects stack
• Fix for #39 - order of classpath elements now maintained when running from maven

Upgrading users may need to modify their build due to removal of the inScopeClasses parameter

• Ant support
• New experimental mutator for member variables
• Fix for #12 #27 - no longer hangs when code under test launches non daemon threads
• Fix for #26 - now warns when no test library found on classpath
• Fix for #30 - now errors if mutated classes have no line or source debug
• Fix for #32 - now correctly handles of JUnit assumptions

Known issue - The new member variable mutator may cause errors in synchronized errors. The mutator is however disabled by default, and the generated errors are correctly handled by PIT.

• TestNG support (experimental)
• Fix for issue where mutations in nested classes not isolated from each other
• Fix for broken classpath isolation for projects using xstream
• Improved handling of JUnit parametrized tests
• Ability to limit mutations to specific classpath roots (--mutableCodePaths)
• Ability to add non launch classpath roots (--classPath) (experimental)
• Read configuration values from XML (experimental)
• Option to not throw error when no mutations found
• Consistent ordering of classes in HTML report
• Statistics written to console
• Classes no longer loaded during initial classpath scanning
• New syntax to easily enable all mutation operations

• JMockit support
• Option to output results in XML or CSV
• Fix for #11
• Improved INLINE_CONSTS mutator

• Fix for issue 7 - source files not located

• Upgrade of Xstream to 1.4.1 to enable OpenJDK 7 support
• Fix for #5 - corruption of newline character in child processes
• Ability to set child process launch arguments

• Significant performance improvements
• Support for powermock via both classloader (requires PowerMockIgnore annotation) and java agent
• Minor error reporting and usability improvements
• Fix for major defect around dependency analysis
• PIT dependencies no longer placed on classpath when running via maven
• Support for excluding certain classes or tests
• Support for verbose logging

• Limit number of mutations per class
• Upgrade xstream to 1.3.1
• Make available from maven central

• Built in enum methods now excluded from mutation
• Fixed bug around reporting of untested classes
• Support for excluding tests greater than a certain distance from class
• Support for excluding methods from mutation analysis
• Performance improvements
• Removed support for launching mutation reports from JUnit runner

• First public release