Test setup helper added (#1482)

* signing prefix added

* Minor improvement

* Tests changed

* Successfully tested

* Minor improvements

* Minor improvements

* Revert "Dangling commas are now required. (#1359)"

This reverts commit a6889776f4.

* updates

* fixes #1404

* approve failing test

* suggested changes done

* ISafeERC20 removed

* conflict fixes

* fixes #1205

* minor change

* suggested changes

* reviewed changes

* final update

test/cryptography/ECDSA.test.js

@@ -3,8 +3,7 @@ const shouldFail = require('../helpers/shouldFail');
 
 const ECDSAMock = artifacts.require('ECDSAMock');
 
-require('chai')
-  .should();
+require('../helpers/setup');
 
 const TEST_MESSAGE = web3.sha3('OpenZeppelin');
 const WRONG_MESSAGE = web3.sha3('Nope');