openzeppelin-contracts/test/helpers/expectThrow.js

export default async promise => {
  try {
    await promise;
  } catch (error) {
    // TODO: Check jump destination to destinguish between a throw
    //       and an actual invalid jump.
    const invalidJump = error.message.search('invalid JUMP') >= 0;
    // TODO: When we contract A calls contract B, and B throws, instead
    //       of an 'invalid jump', we get an 'out of gas' error. How do
    //       we distinguish this from an actual out of gas event? (The
    //       testrpc log actually show an 'invalid jump' event.)
    const outOfGas = error.message.search('out of gas') >= 0;
    assert(
      invalidJump || outOfGas,
      "Expected throw, got '" + error + "' instead",
    );
    return;
  }
  assert.fail('Expected throw not received');
};