skills17/stryker-helpers

This package provides Stryker helpers for usage in a skills competition environment. It includes:

• Custom output formatter

Table of contents

• Installation
• Usage
• License

Installation

Requirements:

• Node 18 or greater

To install this package, run the following command:

npm install @skills17/stryker-helpers

It is suggested to add the following npm scripts:

"scripts": {
"test": "skills17-stryker run",
"test:json": "skills17-stryker run --json"
},

This will provide the following commands:

• npm test - Run all tests once and show a nice output with the awarded points (useful for the competitors to see their points)
• npm run test:json - Run all tests once and get a json output (useful for automated marking scripts)

Points can be awarded for coverage of conditionals and deductions for number of mutants survived. If any test fails in normal execution, no points will be awarded.

Usage

A config.yaml file needs to be created that contains some information about the task. It should be placed in the root folder of your task, next to the package.json file.

See the @skills17/task-config package for a detailed description of all available properties in the config.yaml file.

CLI

As seen in the installation instructions, the skills17-stryker command is available.

It is a thin wrapper around the stryker run command.

All arguments to the command will be forwarded to stryker so Stryker can be used exactly the same way if this package wouldn't be installed.

Additionally, the following new arguments are available:

• --json output the test result with scored points in json to standard out

Scoring

The generated test names are in the following format:

[file key]-[mutant name]

The file key is the file name being tested with the extension and src/ removed. Path separators are replace with .. If multiple mutants with the same name are generated, any surviving mutant will make the test fail.

Extra tests

With skills17/stryker-helpers there are no extra tests needed.

License

MIT