newTests.js

const { getWeb3, getContractInstance } = require("./helpers")
const web3 = getWeb3()
const getInstance = getContractInstance(web3)

contract("Counter", (accounts) => {
  it("should initialize with a count of 0", async () => {
    const counter = getInstance("Counter")

    const count = await counter.methods.get().call()
    const expected = 0

    assert.equal(count, expected, "count was not intialized with 0")
  })

  it("should increment to a count of 1", async () => {
    const counter = getInstance("Counter")

    await counter.methods.increment().send({ from: accounts[0] })
    const count = await counter.methods.get().call()
    const expected = 1

    assert.equal(count, expected, "count was not incremented to 1")
  })

  it("should decrement back to a count of 0", async () => {
    const counter = getInstance("Counter")

    await counter.methods.decrement().send({ from: accounts[0] })
    const count = await counter.methods.get().call()
    const expected = 0

    assert.equal(count, expected, "count was not decremented back to 0")
  })
})