Introduction to Unit Testing

[mervxxgotti]

I was having the same issues as the rest of the forum with running test but it not working so I had to downgrade node.js.

When i use test, it runs now but it always gives me “0 passing”.

I’m not sure if this is problem with node or my code? I also saw there is a new Smart Contract 201 class. Should I just do that if this old version has compatibility issues?

Here is my code:

HelloWorld.js

pragma solidity 0.5.12;

contract HelloWorld {
  string message = "Hello World!";

  function getMessage() public view returns (string memory) {
    return message;
  }

  function setMessage(string memory _message) public payable {
    message = _message;
  }
}

2_HelloWorld_deploy.js

const HelloWorld = artifacts.require("HelloWorld");

module.exports = function(deployer, network, accounts){
  deployer.deploy(HelloWorld).then(function(instance){
    instance.setMessage("PROMISE", {value: 100000000000000000, from: accounts[0]}).then(function(){
        console.log("SET SUCCESS");
      }).catch(function(err){
        console.log("ERROR: " + err);
      });
  }).catch(function(err){
    console.log("Deloy failed: " + err);
  });
};

HelloWorldTest.js

const HelloWorld = artifacts.require("HelloWorld");

contract("HelloWorld", async function(){

  it("should initialize correctly", async function(){
    let instance = await HelloWorld.deployed();
    let message = await instance.getMessage();
    assert(message == "PROMISE");
  });
});

Thanks for the help!

[mervxxgotti]

Here is the terminal screenshot, not sure why I’m getting 0 passing when in the video it shows Filip gets 2 passing?

[dan-i]

Hi @mervxxgotti

Your test runs fine in my computer.

Run:

• truffle develop

Once the blockchain is ready

• test

Regards,
Dani

[mervxxgotti]

Tried running > truffle develop then > test

Still gets “0 passing”, is there something wrong with my assert function? or is this a version issue? even when I change the setMessage string so it doesn’t match the assert function and should fail, it still reports “0 passing” so “0 passing” shows regardless.

Even when I add in the code from the second part of the Unit Testing Introduction, I still get “0 passing” when I thought I should be getting “2 passing” and the it() messages?

Thanks for all the help!

const HelloWorld = artifacts.require("HelloWorld");

contract("HelloWorld", async function(){

  it("should initialize correctly", async function(){
    let instance = await HelloWorld.deployed();
    let message = await instance.getMessage();
    assert(message === "PROMISE", "FAIL!");
  });
  it("should set the message correctly", async function(){
    let instance = await HelloWorld.deployed();
    await instance.setMessage("TESTTEST");
    let message = await instance.getMessage();
    assert(message === "TESTTEST", "FAIL2!");
  });
});

[dan-i]

Hey @mervxxgotti

You see ‘0 passing’ because your tests are not running however I was able to copy/paste your code and run it.
There has to be something wrong somewhere else, push your code on GitHub and give me the link so that I can copy and test.

Thanks
Dani

[mervxxgotti]

It’s working now. While figuring out how to push to GitHub I noticed the test .js file was not actually in the test folder but I made it accidentally outside of it

Thanks so much for you patience!

Since it’s necessary anyway, does Ivan On Tech have any lessons on using GitHub or can you recommend me any good tutorials?

Thanks!

[dan-i]

I learned git with lots of practice and google
It can seem annoying at the beginning but the more you practice, the more it will become clear.
For any question, YouTube is also full of Git tutorial.