Assertion Fails with different values.

[kihiuFrank]

I have faced may errors while testing my staging test at lesson 9 and managed to solve them but this one I don't understand.
My error seems to be with the assertion that;

assert.equal(
             winnerEndingBalance.toString(),
             winnerStartingBalance.add(raffleEntranceFee).toString()
)

The error I get is;

1) Raffle Unit Tests
       fulfillRandomWords
         works with live chainlink keepers and chainlink VRF, we get a random winner:

      AssertionError: expected '1188256547412043550' to equal '1198256547515642318'
      + expected - actual

      -1188256547412043550
      +1198256547515642318
      
      at FragmentRunningEvent.<anonymous> (test/staging/Raffle.staging.test.js:42:38)
      at processTicksAndRejections (node:internal/process/task_queues:96:5)

I thought the difference might be gas but it's unlikely.

The tutorial just covers winnerEndingBalance and winnerStartingBalance + raffleEntranceFee.
What other value could I have omitted? Why is the startingBalance(collectively) more than the endingBalance?

Full test;

describe("fulfillRandomWords", function () {
              it("works with live chainlink keepers and chainlink VRF, we get a random winner", async function () {
                  console.log("Setting up test...")
                  // grab starting timestamp
                  const startingTimestamp = await raffle.getLastestTimeStamp()

                  const accounts = await ethers.getSigners()

                  // set up a listener before we enter the raffle
                  // just incase the blockchain moves really fast
                  console.log("Setting up Listener...")
                  await new Promise(async (resolve, reject) => {
                      raffle.once("WinnerPicked", async () => {
                          console.log("WinnerPicked event fired!")
                          try {
                              // add our asserts here
                              const recentWinner = await raffle.getRecentWinner()
                              const raffleState = await raffle.getRaffleState()
                              const winnerEndingBalance = await accounts[0].getBalance()
                              const endingTimestamp = await raffle.getLastestTimeStamp()

                              await expect(raffle.getPlayers(0)).to.be.reverted
                              //assert.equal(recentWinner.toString(), deployer.toString())
                              assert.equal(recentWinner.toString(), accounts[0].address)
                              assert.equal(raffleState, 0)
                              assert.equal(
                                  winnerEndingBalance.toString(),
                                  winnerStartingBalance.add(raffleEntranceFee).toString()
                              )
                              assert(endingTimestamp > startingTimestamp)
                              resolve()
                          } catch (error) {
                              console.log(error)
                              reject(error)
                          }
                      })
                      // enter the raffle
                      console.log("Entering Raffle...")
                      await raffle.enterRaffle({ value: raffleEntranceFee })
                      console.log("Ok, time to wait...")
                      const winnerStartingBalance = await accounts[0].getBalance()
                      // this code won't complete until listener has finished listening
                  })
              })
          })

[kihiuFrank]

I have faced may errors while testing my staging test at lesson 9 and managed to solve them but this one I don't understand. My error seems to be with the assertion that;

assert.equal(
             winnerEndingBalance.toString(),
             winnerStartingBalance.add(raffleEntranceFee).toString()
)

The error I get is;

1) Raffle Unit Tests
       fulfillRandomWords
         works with live chainlink keepers and chainlink VRF, we get a random winner:

      AssertionError: expected '1188256547412043550' to equal '1198256547515642318'
      + expected - actual

      -1188256547412043550
      +1198256547515642318
      
      at FragmentRunningEvent.<anonymous> (test/staging/Raffle.staging.test.js:42:38)
      at processTicksAndRejections (node:internal/process/task_queues:96:5)

I thought the difference might be gas but it's unlikely.

The tutorial just covers winnerEndingBalance and winnerStartingBalance + raffleEntranceFee. What other value could I have omitted? Why is the startingBalance(collectively) more than the endingBalance?

Full test;

describe("fulfillRandomWords", function () {
              it("works with live chainlink keepers and chainlink VRF, we get a random winner", async function () {
                  console.log("Setting up test...")
                  // grab starting timestamp
                  const startingTimestamp = await raffle.getLastestTimeStamp()

                  const accounts = await ethers.getSigners()

                  // set up a listener before we enter the raffle
                  // just incase the blockchain moves really fast
                  console.log("Setting up Listener...")
                  await new Promise(async (resolve, reject) => {
                      raffle.once("WinnerPicked", async () => {
                          console.log("WinnerPicked event fired!")
                          try {
                              // add our asserts here
                              const recentWinner = await raffle.getRecentWinner()
                              const raffleState = await raffle.getRaffleState()
                              const winnerEndingBalance = await accounts[0].getBalance()
                              const endingTimestamp = await raffle.getLastestTimeStamp()

                              await expect(raffle.getPlayers(0)).to.be.reverted
                              //assert.equal(recentWinner.toString(), deployer.toString())
                              assert.equal(recentWinner.toString(), accounts[0].address)
                              assert.equal(raffleState, 0)
                              assert.equal(
                                  winnerEndingBalance.toString(),
                                  winnerStartingBalance.add(raffleEntranceFee).toString()
                              )
                              assert(endingTimestamp > startingTimestamp)
                              resolve()
                          } catch (error) {
                              console.log(error)
                              reject(error)
                          }
                      })
                      // enter the raffle
                      console.log("Entering Raffle...")
                      await raffle.enterRaffle({ value: raffleEntranceFee })
                      console.log("Ok, time to wait...")
                      const winnerStartingBalance = await accounts[0].getBalance()
                      // this code won't complete until listener has finished listening
                  })
              })
          })

@othaime-en any ideas sir?

[othaime-en]

Hey @kihiuFrank please push your code to github and leave a link here. I can't see any error here. I need to run it locally and see if I can figure out what is wrong.

[othaime-en]

Wow nice. Feels good to fix your own bugs doesn't it? Really glad you got to fix it by yourself. All the best.

[gigaBrane]

Solved my problem. Should mark the fix as correct answer

[kihiuFrank]

@bigbraincrypto, Glad it helped.

[jvalero84]

@kihiuFrank I was facing the same issue as you and your fix solved it. Thanks a lot!

[M-D-Nadeem]

@kihiuFrank Thanks i was also facing this problem, thanks a lot.