log4js-node/test/sandbox-coverage.js

const sandbox = require('@log4js-node/sandboxed-module');

sandbox.configure({
  sourceTransformers: {
    nyc(source) {
      if (this.filename.indexOf('node_modules') > -1) {
        return source;
      }
      const nyc = new (require('nyc'))({});
      return nyc
        .instrumenter()
        .instrumentSync(source, this.filename, { registerMap: () => {} });
    },
  },
});