@onflow/flow-js-testing/examples/04-get-contract-address.test.js

This package will expose a set of utility methods, to allow Cadence code testing with libraries like Jest

import path from "path"
import {
  init,
  emulator,
  deployContractByName,
  getContractAddress,
  isAddress,
} from "../src"

beforeEach(async () => {
  const basePath = path.resolve(__dirname, "./cadence")

  await init(basePath)
  await emulator.start()
})

test("get contract address", async () => {
  // if we omit "to" it will be deployed to Service Account
  // but let's pretend we don't know where it will be deployed :)
  await deployContractByName({name: "Hello"})

  const contractAddress = await getContractAddress("Hello")

  // Expect contractAddress to be address
  expect(isAddress(contractAddress)).toBe(true)
})

afterEach(async () => {
  await emulator.stop()
})