liquid-funding/test/helpers/assertFail.js

const chai = require('chai');
const assert = chai.assert;

module.exports = async function(promise) {
    let web3_error_thrown = false;
    try {
        await promise
            .then(({ status }) => {
                if (status === '0x00') {
                    web3_error_thrown = true;
                }
            });
    } catch (error) {
        if (error.message.includes("invalid opcode") || error.message.includes('revert')) web3_error_thrown = true;
    }
    assert.ok(web3_error_thrown, "Transaction should fail");
};