A misleading error message if an interface is not implemented completely

[mushketyk]

If a contract inherits an interface and does not implement one of the methods Truffle test displays the following error:

$ truffle test  
Using network 'test'.

Compiling ./contracts/Interface.sol...
Compiling ./contracts/Contract.sol...


  Contract: Contract
    1) "before each" hook for "contract is initialized"


  0 passing (129ms)
  1 failing

  1) Contract: Contract
       "before each" hook for "contract is initialized":
     Error: The contract code couldn't be stored, please check your gas amount.
      at Object.callback (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/contract.js:147:1)
      at /usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/method.js:142:1
      at /usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/requestmanager.js:89:1
      at /usr/local/lib/node_modules/truffle/build/webpack:/~/truffle-provider/wrapper.js:134:1
      at XMLHttpRequest.request.onreadystatechange (/usr/local/lib/node_modules/truffle/build/webpack:/~/web3/lib/web3/httpprovider.js:128:1)
      at XMLHttpRequestEventTarget.dispatchEvent (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2/lib/xhr2.js:64:1)
      at XMLHttpRequest._setReadyState (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2/lib/xhr2.js:354:1)
      at XMLHttpRequest._onHttpResponseEnd (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2/lib/xhr2.js:509:1)
      at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/truffle/build/webpack:/~/xhr2/lib/xhr2.js:469:1)
      at endReadableNT (_stream_readable.js:1106:12)
      at process._tickCallback (internal/process/next_tick.js:114:19)

Is it possible output a better error message in this case?

[cgewecke]

@mushketyk Agree - we're tracking this problem for Migrations in #971 and there's a little more detail about why this happens here. That case is being addressed with PR #1028.

However you are seeing this with truffle test and I'd like to make sure we handle that correctly. Could you show anything of your beforeEach hook (if there is one) or your migrations.js files (if you've written any)?

[mushketyk]

@cgewecke

Here is my beforeEach method:

  beforeEach(async function() {
    funding = await TestCrowdFundingWithDeadline.new(1, 10, beneficiary, {from: owner, gas: 2000000});
  });

It just deploys a contract.

For migrations, for now I only have a default migration that is defined like:

var Migrations = artifacts.require("./Migrations.sol");

module.exports = function(deployer) {
  deployer.deploy(Migrations);
};

[stale]

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[stale]

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