Function expectedException

lib/assert.js:301–315

(actual, expected)

};

function expectedException(actual, expected) {
  if (!actual || !expected) {
    return false;
  }

  if (expected instanceof RegExp) {
    return expected.test(actual.message || actual);
  } else if (actual instanceof expected) {
    return true;
  } else if (expected.call({}, actual) === true) {
    return true;
  }

  return false;
}

function _throws(shouldThrow, block, expected, message) {
  var actual;