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

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

import path from 'path';
import fs from 'fs';
import { tokens, commonTokens } from '@stryker-mutator/api/plugin';
import { LibWrapper } from './lib-wrapper.js';
/**
 * A class that contains polyfills for different versions of mocha.
 * Tries to mimic the functionality of mocha's latest api.
 *
 * Currently supports mocha < 6
 */
export class MochaAdapter {
    log;
    static inject = tokens(commonTokens.logger);
    constructor(log) {
        this.log = log;
    }
    create(options) {
        return new LibWrapper.Mocha(options);
    }
    collectFiles(options) {
        const originalProcessExit = process.exit;
        try {
            // process.exit unfortunate side effect: https://github.com/mochajs/mocha/blob/07ea8763c663bdd3fe1f8446cdb62dae233f4916/lib/cli/run-helpers.js#L174
            process.exit = () => { };
            const files = LibWrapper.collectFiles(options);
            if (Array.isArray(files)) {
                return files;
            }
            else {
                return files.files;
            }
        }
        finally {
            process.exit = originalProcessExit;
        }
    }
    async handleRequires(requires) {
        this.log.trace('Resolving requires %s', requires);
        if (LibWrapper.handleRequires) {
            this.log.trace('Using `handleRequires`');
            const rawRootHooks = await LibWrapper.handleRequires(requires);
            if (rawRootHooks) {
                if (LibWrapper.loadRootHooks) {
                    // `loadRootHooks` made a brief appearance in mocha 8, removed in mocha 8.2
                    return await LibWrapper.loadRootHooks(rawRootHooks);
                }
                else {
                    return rawRootHooks.rootHooks;
                }
            }
        }
        else {
            const modulesToRequire = requires.map((moduleName) => {
                const maybeSetupFileName = path.resolve(moduleName);
                if (fs.existsSync(maybeSetupFileName)) {
                    return maybeSetupFileName;
                }
                else {
                    return moduleName;
                }
            });
            this.log.trace('Requiring %s manually', modulesToRequire);
            modulesToRequire.forEach(LibWrapper.require);
        }
        return undefined;
    }
}
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