Lesson 7, Unit testing TypeError: Cannot read properties of undefined (reading 'getBalance')

[ChpokmanKG]

Here is my code

const { assert, expect } = require("chai")
const { deployments, ethers, getNamedAccounts } = require("hardhat")

describe("FundMe", async () => {
  let fundMe
  let deployer
  let mockV3Aggregator
  const sendValue = ethers.parseEther("1")
  beforeEach(async function () {
    //const accounts = await ethers.getSigners()
    //const accountZero = account[0]
    deployer = (await getNamedAccounts()).deployer
    await deployments.fixture(["all"]) // deploy all contracts using deployment.fixture()
    fundMe = await ethers.getContract("FundMe", deployer)
    mockV3Aggregator = await ethers.getContract("MockV3Aggregator", deployer)
  })

  describe("constructor", async function () {
    it("Should set the aggregator addresses correctly", async function () {
      const response = await fundMe.priceFeed()
      assert.equal(response, mockV3Aggregator.target)
    })
  })

  describe("fund", async () => {
    it("fails if you dont send enough eth", async () => {
      await expect(fundMe.fund()).to.be.revertedWith(
        "You need to spend more ETH!",
      )
    })

    it("updates the amount founded data structure", async () => {
      await fundMe.fund({ value: sendValue })
      const response = await fundMe.addressToAmountFunded(deployer)
      assert.equal(response.toString(), sendValue.toString())
    })
    it("Adds funder to array of funders", async () => {
      await fundMe.fund({ value: sendValue })
      const funder = await fundMe.funders(0)
      assert.equal(funder, deployer)
    })
  })

  describe("withdraw", async () => {
    beforeEach(async () => {
      await fundMe.fund({ value: sendValue })
    })
    it("withdraws ETH from a single funder", async () => {
      // Arrange
      const startingFundMeBalance = await fundMe.provider.getBalance(
        fundMe.address,
      )
      const startingDeployerBalance = await fundMe.provider.getBalance(deployer)

      // Act
      const transactionResponse = await fundMe.withdraw()
      const transactionReceipt = await transactionResponse.wait(1)
      const { gasUsed, effectiveGasPrice } = transactionReceipt
      const gasCost = gasUsed.mul(effectiveGasPrice)

      const endingFundMeBalance = await fundMe.provider.getBalance(
        fundMe.address,
      )
      const endingDeployerBalance = await fundMe.provider.getBalance(deployer)

      // Assert
      // Maybe clean up to understand the testing
      assert.equal(endingFundMeBalance, 0)
      assert.equal(
        startingFundMeBalance.add(startingDeployerBalance).toString(),
        endingDeployerBalance.add(gasCost).toString(),
      )
    })
  })
})

The last test case keep throwing the error

TypeError: Cannot read properties of undefined (reading 'getBalance')
      at Context.<anonymous> (test/unit/fund.test.js:51:61)

Code of the last test was copied from the repo. Tried to debug it but debugger didn't work. I did't find an asnwer here.

[alfaqi]

Change await fundMe.provider.getBalance( to await ethers.provider.getBalance(