@stryker-mutator/mocha-runner/dist/src/utils.js

A plugin to use the mocha test runner in Stryker, the JavaScript mutation testing framework

import fs from 'fs';
const mochaSchema = JSON.parse(fs.readFileSync(new URL('../schema/mocha-runner-options.json', import.meta.url), 'utf-8'));
export function serializeMochaLoadOptionsArguments(mochaOptions) {
    const args = [];
    if (mochaOptions['no-config']) {
        args.push('--no-config');
    }
    if (mochaOptions['no-opts']) {
        args.push('--no-opts');
    }
    if (mochaOptions['no-package']) {
        args.push('--no-package');
    }
    if (mochaOptions.package) {
        args.push('--package');
        args.push(mochaOptions.package);
    }
    if (mochaOptions.opts) {
        args.push('--opts');
        args.push(mochaOptions.opts);
    }
    if (mochaOptions.config) {
        args.push('--config');
        args.push(mochaOptions.config);
    }
    return args;
}
const SUPPORTED_MOCHA_OPTIONS = Object.freeze(Object.keys(mochaSchema.properties.mochaOptions.properties));
/**
 * Filter out those config values that are actually useful to run mocha with Stryker
 * @param rawConfig The raw parsed mocha configuration
 */
export function filterConfig(rawConfig) {
    const options = {};
    Object.keys(rawConfig)
        .filter((rawOption) => SUPPORTED_MOCHA_OPTIONS.some((supportedOption) => rawOption === supportedOption))
        .forEach((option) => (options[option] = rawConfig[option]));
    // Config file can also contain positional arguments. They are provided under the `_` key
    // For example:
    // When mocha.opts contains "--async-only test/**/*.js", then "test/**/*.js will be the positional argument
    // We must provide it to mocha as "spec"
    if (rawConfig._?.length) {
        if (!options.spec) {
            options.spec = [];
        }
        const specs = options.spec;
        rawConfig._.forEach((positionalArgument) => specs.push(positionalArgument));
    }
    return options;
}
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