testing fallback function with truffle js

Question

SOLUTION BELOW

How do I go about testing the following fallback function:

function () public payable {
  revert();
}

being that the function does not have a function name, what do I need to do to test it? I tried using a function name that does not exist like this:

it("should not accept ETH deposits", async function() {
  let xferAmt = web3.toWei(0.5, "ether");
  await contract.dummyfunction({value: xferAmt}).should.be.rejectedWith(EVMThrow);
})

But truffle complains about the dummyfunction not being a function.

Thanks. A.

SOLUTION

function () public {}

test:

it("should not accept ETH deposits", async function() {
  let xferAmt = 1;
  await contract.sendTransaction({value: xferAmt}).should.be.rejectedWith(EVMThrow);
});

Answer 1

Make the fallback function:

function () public {
  // dont receive ether via fallback method (by not having 'payable' modifier on this function). 
}

See OpenZeppelin examples: https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/ownership/HasNoEther.sol

And test it with sendTransaction:

it("...should reject sending ether directly to the contract.", async () => {
  instance = await Contract.deployed();
  await assertRevert(
    instance.sendTransaction(
      { from: myAddress, value: 1 }
    )
  );
});