10
votes
Accepted
I am running my tests in the hardhat environment but it gives me 0 passing all the time
This can happen if await ethers.getSigners() is executed in describe clause.
Example that doesn't work (0 passing):
describe("ContractName", async () => {
await ethers.getSigners()
...
- 2,993
10
votes
Accepted
Followed hardhat test tutorial and got "TypeError: (0 , ethers_1.getAddress) is not a function" error
Nomic foundation released a new version of hardhat (2.15.0)
Try:
npm install -g yarn
yarn add --dev hardhat @nomiclabs/hardhat-ethers@npm:hardhat-deploy-ethers ethers
which will force update the ...
- 116
8
votes
Accepted
Transaction reverted: trying to deploy a contract whose code is too large
In this case, the problem was the mal-formed hardhat.config.js file. Here is what should solve the problem:
module.exports = {
solidity: {
version: "0.8.9",
settings: {
...
6
votes
Accepted
Property 'revertedWith' does not exist on type 'Assertion'
Pre June 2022
You need to also add ethereum-waffle to your package, not just the nomiclabs one @nomiclabs/hardhat-waffle. you need both
yarn add --dev ethereum-waffle
you just only need to install ...
- 12.1k
5
votes
Accepted
unit testing with chai : is there a way to simulate or force a failed transaction?
minimal code to implement Lauri's suggestion
Target.sol (contract being tested)
pragma solidity ^0.8.10;
contract Target {
address payable owner;
constructor () {
owner = payable(...
- 1,248
5
votes
Accepted
Comparing ethers BigNumber does not work
Try like this :
expect(totalSupply.eq(BigNumber.from("4")).to.equal(true);
This is because to.equal internally uses the strict equality check === which on Objects only returns true if the ...
- 7,841
4
votes
Smart Contract Testing - ethereum-waffle expect function
The await keyword blocks continuation of execution until a promise has been resolved (or rejected, which throws an Error).
This is nothing specific to waffle, it's a feature of modern JavaScript and ...
- 96
4
votes
Property 'revertedWith' does not exist on type 'Assertion'
Hardhat has released a new package named hardhat-toolbox to replace hardhat-waffle.
Install it with npm install --save-dev @nomicfoundation/hardhat-toolbox and then import it in your hardhat.config.js ...
- 649
3
votes
solidity function functionCall from openzeppelin-contracts-accounts reverted
i was able to solve this.
the issue was functionCall requires a bytes String of an function.
So here i was in need of approve function byte string.
bytes memory data = abi.encodeWithSignature(
...
- 151
3
votes
Property 'revertedWith' does not exist on type 'Assertion'
I was experiencing this issue as well and most online help weren't addressing the underlying cause.
You also have to add the following to your test files to use event emitters from chai matchers:
...
3
votes
Accepted
Why are there so many async and await in smart contract tests?
Not only on smart contract tests, but in Javascript and Nodejs, in general, is common to find many async/await function calls.
The Javascript is single-threaded. So, how do you get this sense of ...
- 4,629
2
votes
Accepted
How to test a function which calls another contract from inside the function?
I'm assuming your question is "How do I interact with the deployed 'newToken' contract created in 'createContract.create'?".
I haven't used truffle before, so the following code is untested.
...
- 1,625
2
votes
How test uint from smartcontract with chai?
Self answer :
expect(parseInt(amountForSpenderBeforeWithdraw)).to.be.greaterThan(parseInt(amountForSpenderAfterWithdraw));
- 157
2
votes
I am running my tests in the hardhat environment but it gives me 0 passing all the time
once upon a time, i wrote this, it should be "it", but i wrote "if". no error, just tip "0 passing",
describe("Token contract", function () {
if("...
- 21
2
votes
Accepted
Convert big number to number on hardhat tests
You're getting an overflow error, because javascript can't represent this number with enough accuracy. Even if you were able to convert it to a number, comparing it with any other would not be ...
- 1,625
2
votes
npm throw errors when installing dependencies of hardhat
Hardhat migrated waffle plugin to the chai detailed info here
https://hardhat.org/hardhat-runner/docs/guides/migrating-from-hardhat-waffle#migrating-away-from-hardhat-waffle
- 21
2
votes
Hardhat test is not working
Your beforEach(async function () is missing an "e" at the end of before
Should be beforeEach(async function ()
- 21
2
votes
Accepted
How to use variables set inside a beforeEach with hardhat testing
You have defined local constant called owner, but haven't assigned the global owner value. Just remove the const from beforeEach action and you should have access to globally defined owner:
...
- 505
2
votes
Accepted
Encountering difficulties while writing tests with .connect(notDeployer)
You should connect to a signer, not an address.
accounts = await ethers.getSigners()
await LPR.connect(accounts[1]).gift(someAddress)
- 524
2
votes
revertedWith not matched error message
I ran into a very similar error as this, and after a lot of searching, this discussion proved helpful to me, specifically this comment here
The important bit is that apparently BigNumbers matchers use ...
- 121
2
votes
hardhat: want to test an emit event that is in a library
When you have a contract that emits an event in an underlying library instead of the contract itself, since the contract doesn't contain the ABI of the event you probably face this error:
...
- 21
2
votes
Accepted
What is a good way to learn Solidity?
Solidity isn't really a hard language to learn if you know basic programming concepts.
There are multiple places that are teaching solidity and it is hard to say which is the best place.
So I will ...
- 978
2
votes
How to get the gas costs of a reversed transaction when testing (with Chai / ethers.js / Hardhat)?
I've figured out a way to do this, althought I wonder if there isn't an easier way.
// Get latest transaction hash
const latestBlock = await ethers.provider.getBlock("latest");
...
- 163
2
votes
Transaction reverted: trying to deploy a contract whose code is too large
This one is hard to answer without the smart contract code. I guess the compiled bytecode is too large (e.g. 24kb limit in ETH), You may try to use optimizer when compiling: https://hardhat.org/...
- 1,820
2
votes
Transaction reverted: trying to deploy a contract whose code is too large
Sometimes, it could also be that the contract costs more gas than the limit you set on it, I had a similar problem and I got over it by
removing the gas limit and deploying on a local node
checking ...
2
votes
Accepted
How to work with block timestamps in ethers and hardhat?
I think the first require statement fails, because you are passing the blockTimestamp value to the launch function as startAt.
Try to test the condition where the campaign is too short by adding a few ...
- 648
2
votes
How to write test cases for custom errors?
What error is it? I tried it by myself and see the error Invalid Chai property: revertedWithCustomError.
Did you try to change revertedWithCustomError => revertedWith like below?
it("Should ...
- 503
1
vote
Encountering difficulties while writing tests with .connect(notDeployer)
According to ethersjs docs:
A Signer in ethers is an abstraction of an Ethereum Account, which can
be used to sign messages and transactions and send signed transactions
to the Ethereum Network to ...
- 174
1
vote
Encountering difficulties while writing tests with .connect(notDeployer)
well do this way here we are connecting addr1 and gifting to addr2
const connectacc2 = await LPR.connect(addr1.address).gift(addr2.address);
- 294
1
vote
How to Properly Unit Test onlyOwner
The await keyword is at the wrong place. Replace this part:
await expect(token721
.connect(account1.address)
.mint(account1.address, TEST_URI1))
.to.be.rejectedWith("...
Only top scored, non community-wiki answers of a minimum length are eligible