JS test hangs when solidity method is named 'toString'

• I’ve asked for help in the Truffle Gitter before filing this issue.

---

Issue

I have this utility function

library ByteUtils {
    function toString(bytes32[10] _data) internal pure returns (string) {
        bytes memory allBytes = new bytes(10 * 32);
        uint length;
        for (uint i = 0; i < 10; i++) {
            for (uint j = 0; j < 32; j++) {
                byte char = _data[i][j];
                if (char != 0) {
                    allBytes[length] = char;
                    length++;
                }
            }
        }

        bytes memory trimmedBytes = new bytes(length + 1);
        for (i = 0; i < length; i++) {
            trimmedBytes[i] = allBytes[i];
        }

        return string(trimmedBytes);
    }
}

that hangs when trying to test. I created a wrapper mock class to test it since it is internal:

contract ByteUtilsMock {
    function toString(bytes32[10] _data) public pure returns (string) {
        return ByteUtils.toString(_data);
    }
}

Here is my test class:

contract('ByteUtils', function(accounts) {
    const blockHeightManager = new BlockHeightManager(web3);

    let instance;

    beforeEach(blockHeightManager.snapshot);
    afterEach(blockHeightManager.revert);

    beforeEach(async function() {
        instance = await ByteUtilsMock.new();
    });

    describe('toString', async function() {
        it('should return the string', async function() {
            var test = ["Who will be the next president i", "n the 2020 election?"];
            assert.equal(await instance.toString(test), test.join(''), 'test 2 does not match');
        });
    });
});

It just stops at this test and nothing happens after that (and eventually times out). Please note I have another contract/tests that uses ByteUtils directly as a library and those tests pass with no issues.

Steps to Reproduce

Copy my utility function toString() and make a wrapper contract class. Then truffle test

Expected Behavior

Test should pass and not hang.

Actual Results

Doing truffle test all the other tests pass up to this test then it just hangs and stays there.

Environment

• Operating System: Mac OSX 10.12.6
• Truffle version: 4.0.1
• Ethereum client: cpp-ethereum
• node version: 8.8.0
• npm version: 5.4.2

[dwalintukan]

@Elaniobro I’ve tested the fix and it works so it should be closed. I didn’t create that one on gitcoin.co.

[Elaniobro]

Is this issue still open? I see it on gitcoin.co but its marked closed by @dwalintukan