Cosmic Ray vs MuJava
Cosmic Ray
cosmic-ray.readthedocs.ioMuJava
albany.eduSide by side
| Figure | Cosmic Ray | MuJava |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 0 | 1 |
| Spec score · Mutation Testing Tools | 7.5 (#13) | 8.4 (#3) |
| Intended users | The documentation presents Cosmic Ray for Python projects whose teams want to check whether their test suites meaningfully verify code behavior. | The maker describes MuJava as a service to the community and says it has been used by students and researchers. |
| License | The project repository identifies the software as MIT licensed. | The project was released as open source under the Apache license in April 2015. |
| Purpose | Cosmic Ray is a mutation testing tool for Python 3 that makes small changes to production code and runs the test suite against each change. | MuJava automatically generates mutants for Java programs for traditional method-level and class-level mutation testing. |
Plans
In their own words
Cosmic Ray
Cosmic Ray has no write-up on Specifiction yet; its figures are above.
MuJava
MuJava is a free, open-source tool for mutation testing of Java programs. It generates mutants for individual classes and packages, using 24 class-level operators as well as method-level operators, then runs tests against those mutants and evaluates mutation coverage. Tests must be JUnit test cases with public test classes and methods that call the classes under test; JUnit test suites are not supported. Equivalent mutants require manual identification, and the documentation says they typically make up 5% to 20% of mutants. Version 4 supports Java 1.6 language features, including generics, annotations, enumerations, varargs, enhanced for-each loops and static imports. Setup uses two JAR files and a configuration file, with Java CLASSPATH and PATH configuration. The documented workflow uses Java GUI applications; a command-line interface called muScript was released in March 2014, and an Eclipse plugin was created in 2007. The project is provided as-is, without guarantees of answers, repairs or improvements. It is available for Linux, macOS and Windows.