openzeppelin-contracts/test/Inheritable.js

'use strict'
import increaseTime from './helpers/increaseTime'
import expectThrow from './helpers/expectThrow';

const NULL_ADDRESS = '0x0000000000000000000000000000000000000000'

const Inheritable = artifacts.require('../contracts/ownership/Inheritable.sol')

contract('Inheritable', function(accounts) {
  let inheritable
  let owner

  beforeEach(async function() {
    inheritable = await Inheritable.new(4141)
    owner = await inheritable.owner()
  })

  it('should start off with an owner, but without heir', async function() {
    const heir = await inheritable.heir()

    assert.equal(typeof(owner), 'string')
    assert.equal(typeof(heir), 'string')
    assert.notStrictEqual(
      owner, NULL_ADDRESS,
      "Owner shouldn't be the null address"
      )
    assert.isTrue(
      heir === NULL_ADDRESS,
      "Heir should be the null address"
    )
   })

  it('only owner should set heir', async function() {
    const newHeir = accounts[1]
    const someRandomAddress = accounts[2]
    assert.isTrue(owner !== someRandomAddress)

    await inheritable.setHeir(newHeir, {from: owner})
    await expectThrow(inheritable.setHeir(newHeir, {from: someRandomAddress}))
  })

  it('owner can remove heir', async function() {
    const newHeir = accounts[1]
    await inheritable.setHeir(newHeir, {from: owner})
    let heir = await inheritable.heir()

    assert.notStrictEqual(heir, NULL_ADDRESS)
    await inheritable.removeHeir()
    heir = await inheritable.heir()
    assert.isTrue(heir === NULL_ADDRESS)
  })

  it('heir can inherit only if owner is dead and timeout was reached', async function() {
    const heir = accounts[1]
    await inheritable.setHeir(heir, {from: owner})
    await expectThrow(inheritable.inherit({from: heir}))

    await inheritable.proclaimDeath({from: heir})
    await increaseTime(1)
    await expectThrow(inheritable.inherit({from: heir}))

    await increaseTime(4141)
    await inheritable.inherit({from: heir})
    assert.isTrue(await inheritable.heir() === heir)
  })

  it('heir can\'t inherit if owner heartbeats', async function() {
    const heir = accounts[1]
    await inheritable.setHeir(heir, {from: owner})
      
    await inheritable.proclaimDeath({from: heir})
    await inheritable.heartbeat({from: owner})
    await expectThrow(inheritable.inherit({from: heir}))

    await inheritable.proclaimDeath({from: heir})
    await increaseTime(4141)
    await inheritable.heartbeat({from: owner})
    await expectThrow(inheritable.inherit({from: heir}))
  })

  it('should log events appropriately', async function() {
    const heir = accounts[1]

    const setHeirLogs = (await inheritable.setHeir(heir, {from: owner})).logs
    const setHeirEvent = setHeirLogs.find(e => e.event === 'HeirChanged')

    assert.isTrue(setHeirEvent.args.owner === owner)
    assert.isTrue(setHeirEvent.args.newHeir === heir)

    const heartbeatLogs = (await inheritable.heartbeat({from: owner})).logs
    const heartbeatEvent = heartbeatLogs.find(e => e.event === 'OwnerHeartbeated')

    assert.isTrue(heartbeatEvent.args.owner === owner)

    const proclaimDeathLogs = (await inheritable.proclaimDeath({from: heir})).logs
    const ownerDeadEvent = proclaimDeathLogs.find(e => e.event === 'OwnerProclaimedDead')

    assert.isTrue(ownerDeadEvent.args.owner === owner)
    assert.isTrue(ownerDeadEvent.args.heir === heir)

    await increaseTime(4141)
    const inheritLogs = (await inheritable.inherit({from: heir})).logs
    const ownershipTransferredEvent = inheritLogs.find(e => e.event === 'OwnershipTransferred')

    assert.isTrue(ownershipTransferredEvent.args.previousOwner === owner)
    assert.isTrue(ownershipTransferredEvent.args.newOwner === heir)

  })
})