only-changed-jest-watch-plugin/example/node_modules/form-data/lib/populate.js

Jest watch plugin for running either only the modified test (for TDD), or tests of dependant modules

// populates missing values
module.exports = function(dst, src) {

  Object.keys(src).forEach(function(prop)
  {
    dst[prop] = dst[prop] || src[prop];
  });

  return dst;
};