Function expectEqualError

test/test-utils.js:28–37

(e1, e2)

 */
// chai does not do deep equality on errors: https://github.com/chaijs/chai/issues/1009
function expectEqualError(e1, e2) {
  // message and name are not always enumerable, so manually reference them
  expect(e1.message, 'Async/Sync Error equality: message').to.equal(e2.message);
  expect(e1.name, 'Async/Sync Error equality: name').to.equal(e2.name);

  // compare other enumerable error properties
  for(const propertyName in e1) {
    expect(e1[propertyName], `Async/Sync Error equality: ${propertyName}`).to.deep.equal(e2[propertyName]);
  }
}

/**
 * Base64-url encode a string