PIT

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

WeightsClosed

About

PIT is ranked #6 of 25 in mutation testing tools on Inferse. It runs on Linux, macOS, Self-hosted, Windows.

Compared on mutation testing tools

Free plan: Yespitest.org
Supported languages: Java and JVM bytecodepitest.org
Test frameworks: JUnit 3, JUnit 4, TestNG; JUnit 5 via pluginpitest.org
Incremental analysis: Yespitest.org
Parallel execution: Yespitest.org
Surviving mutant reports: Yespitest.org
Mutation quality gate: Yespitest.org
Mutation operators: Conditionals Boundary, Increments, Invert Negatives, Math, Negate Conditionals, Void Method Calls, Empty Returns, False Returns, True Returns, Null Returns, Primitive Returns, Remove Conditionals, Inline Constant, Constructor Calls, Non-Void Method Calls, Remove Increments, Argument Propagation, Big Integer, Member Variable, Naked Receiver, Negation, Arithmetic Operator Replacement, Arithmetic Opepitest.org

Facts

Purpose: PIT runs unit tests against automatically modified versions of application code to measure whether tests detect faults.pitest.org · 30 Sept 2026
Language coverage: PIT is designed for Java and the JVM; Kotlin support is provided through an ArcMutate plugin.pitest.org · 30 Sept 2026
Test selection: PIT uses line coverage, test execution speed, and test naming conventions to select and prioritize tests for mutations.pitest.org · 30 Sept 2026
Build integrations: PIT can be launched from the command line, Ant, or Maven, with third-party integrations for Gradle, Eclipse, and IntelliJ.pitest.org · 30 Sept 2026
Reports: PIT produces reports combining line coverage and mutation coverage information.pitest.org · 30 Sept 2026
Requirements: The FAQ says PIT 1.4.0 and later requires Java 8 or above and either JUnit or TestNG on the classpath.pitest.org · 30 Sept 2026
JUnit 5 limit: JUnit 5 is not supported out of the box, though the FAQ links to a plugin for it.pitest.org · 30 Sept 2026
Runtime limitation: Mutation testing can take a long time depending on codebase size and test suite speed; PIT recommends focusing analysis on changed code.pitest.org · 30 Sept 2026
Bytecode requirement: PIT requires line numbers and source file names in bytecode and mutates bytecode rather than compiling source code.pitest.org · 30 Sept 2026
Distribution: PIT releases are available through GitHub and its binaries are available on Maven Central.pitest.org · 30 Sept 2026
Support: PIT directs users to its Google Group for support questions.pitest.org · 30 Sept 2026
Security and privacy: PIT’s FAQ says generated mutations are held in memory and not written to disk unless its EXPORT feature is explicitly enabled; the site privacy page says it uses Google Analytics cookies and log files.pitest.org · 30 Sept 2026
Maker: The About page identifies Henry Coles, a software developer based in Edinburgh, as the principal author and says PIT has also received contributions from others.pitest.org · 30 Sept 2026
Mutation coverage: PIT reports mutation coverage alongside line coverage, and describes mutation testing as a way to assess whether executed code is meaningfully tested.pitest.org · 30 Sept 2026
IDE integrations: The PIT site lists third-party Eclipse and IntelliJ plugins and says PIT can also be launched from most other IDEs as a Java application.pitest.org · 30 Sept 2026
Language support: The FAQ lists Java as supported and says Kotlin support is available through an ArcMutate plugin.pitest.org · 30 Sept 2026
Mocking frameworks: PIT says it is tested with major mocking frameworks and lists JMock, EasyMock, Mockito, PowerMock, and JMockit as working with it.pitest.org · 30 Sept 2026
Mutation handling: PIT keeps generated mutations in memory and does not write them to disk unless its EXPORT feature is explicitly enabled.pitest.org · 30 Sept 2026
Security and compliance: The PIT pages reviewed do not state security certifications or compliance attestations.pitest.org · 30 Sept 2026