Function withEnv

test/spawnReplacementProcess.test.js:57–68

(key, value, fn)

}

function withEnv(key, value, fn) {
  const had = Object.prototype.hasOwnProperty.call(process.env, key);
  const prev = process.env[key];
  if (value === undefined) delete process.env[key];
  else process.env[key] = value;
  try {
    return fn();
  } finally {
    if (had) process.env[key] = prev;
    else delete process.env[key];
  }
}

describe('spawnReplacementProcess on Windows by default', () => {
  it('returns windows_default_skip without invoking spawn', () => {