lesson:14 unable to run randomIpfsNft.test

[ghost]

here is my randomIpfsNft.test.js

const {developmentChains, networkConfig} = require("../../helper-hardhat-config")
const {getNamedAccounts, deployments, ethers} = require("hardhat")
const {assert, expect} = require("chai")

!developmentChains.includes(network.name)?describe.skip:describe("randomIpfs NFT test", function(){
let randomIpfsNft, deployer, vrfCoordinatorV2Mock
const chainId = network.config.chainId

beforeEach(async function(){
accounts = await ethers.getSigners()
deployer = accounts[0]
await deployments.fixture(["mocks", "randomIpfs"])
randomIpfsNft = await ethers.getContract("RandomIpfsNft")
vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
})
describe("constructor",() =>{
it("sets the initial value correctly", async function(){
const dogTokenUriZero = await randomIpfsNft.getDogTokenUri(0)
const isInitialized = await randomIpfsNft.getInitialized()
assert(dogTokenUriZero.includes("ipfs://"))
assert.equal(isInitialized, true)
})
})
describe("requestNft",()=> {
it("fails if payment is not enough", async () =>{
await expect(randomIpfsNft.requestNft()).to.be.revertedWith("RandomIpfsNft__NeedMoreEth")
})
it("should revert an error if payment amount is less than mint fee", async () =>{
const fee = await randomIpfsNft.getMintFee()
await expect(randomIpfsNft.requestNft({
value:fee.sub(ethers.utils.parseEther("0.001")),}).to.be.revertedWith("RandomIpfsNft__NeedMoreEth"))
})
it("emits an nftRequested events",async () =>{
const fee = await randomIpfsNft.getMintFee()
await expect(randomIpfsNft.requestNft({value:fee.toString()})).to.emit(randomIpfsNft,"NftRequested")
})
})
describe("fulfillRandomWords", async () =>{
})

describe("getBreedFromModdedRng", async () =>{
it("should return pug if the moddedRng is less than 10", async () =>{
const expectedValue = await randomIpfsNft.getBreedFromModdedRng(7)
assert.equal(0, expectedValue)
})
it("should return shiba-INU if the moddedRng value is more than 10 but less than 40", async () =>{
const expectedValue = await randomIpfsNft. getBreedFromModdedRng(21)
assert.equal(1, expectedValue)
})
it("should return st.bernard if moddedRng value is more than 40 but less than 100", async () =>{
const expectedValue = await randomIpfsNft.getBreedFromModdedRng(77)
assert.equal(2, expectedValue)
})
it("should revert back an error if moddedRng value exceed 100", async () =>{
await expect(randomIpfsNft.getBreedFromModdedRng(100)).to.be.revertedWith("RandomIpfsNft__RangeOutOfBounds")
})
})

})

firstly, i do not know where i am going wrong but half of these tests are not working
secondly, i cannot figure out how to write "fulfillRandomWords" tests and i am unable to understand patrick's solution
thirdly, why are we putting these numbers
const expectedValue = await randomIpfsNft.getBreedFromModdedRng(7)
const expectedValue = await randomIpfsNft. getBreedFromModdedRng(21)
const expectedValue = await randomIpfsNft. getBreedFromModdedRng(77)
how are we getting these??? can someone please explain