@stryker-mutator/core
Advanced tools
Professor X: For someone who hates mutants... you certainly keep some strange company. William Stryker: Oh, they serve their purpose... as long as they can be controlled.
For an introduction to mutation testing and StrykerJS features, see stryker-mutator.io.
Please follow the quickstart on the website.
For small js projects, you can try the following command:
npm install --save-dev @stryker-mutator/core
# Only for small projects:
npx stryker run
It will run stryker with default values:
npm test as your test commandlib and src directories$ npx stryker <command> [options] [configFile]
See usage on stryker-mutator.io
See our website for the list of currently supported mutators.
See configuration on stryker-mutator.io.
Stryker can also be used programmatically from nodejs. It exports 2 classes for you to use: Stryker and StrykerCli.
import { Stryker, StrykerCli } from '@stryker-mutator/core';
Both classes can be used to run Stryker. The main difference is that Stryker is a slightly more low-level approach, while StrykerCli is the straight up CLI api.
In this example you can see how to use both.
async function main() {
// Runs Stryker as if it was called directly from the cli. Not even returns a promise, it assumes to be allowed to call `process.exit`.
new StrykerCli(process.argv /* RAW argv array */ ).run();
// Runs Stryker, will not assume to be allowed to exit the process.
const stryker = new Stryker({ concurrency: 4 } /* Partial Stryker options object */ );
const mutantResults = await stryker.runMutationTest();
// mutantResults or rejected with an error.
}
Stryker is written in TypeScript, so it is recommended to use Typescript as well to get the best developer experience.
FAQs
The extendable JavaScript mutation testing framework
The npm package @stryker-mutator/core receives a total of 81,211 weekly downloads. As such, @stryker-mutator/core popularity was classified as popular.
We found that @stryker-mutator/core demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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