openzeppelin-contracts/test/Ownable.js

'use strict'
const assertJump = require('./helpers/assertJump')

var Ownable = artifacts.require('../contracts/ownership/Ownable.sol')

contract('Ownable', function (accounts) {
  let ownable

  beforeEach(async function () {
    ownable = await Ownable.new()
  })

  it('should have an owner', async function () {
    let owner = await ownable.owner()
    assert.isTrue(owner !== 0)
  })

  it('changes owner after transfer', async function () {
    let other = accounts[1]
    await ownable.transferOwnership(other)
    let owner = await ownable.owner()

    assert.isTrue(owner === other)
  })

  it('should prevent non-owners from transfering', async function () {
    const other = accounts[2]
    const owner = await ownable.owner.call()
    assert.isTrue(owner !== other)
    try {
      await ownable.transferOwnership(other, {from: other})
    } catch (error) {
      assertJump(error)
    }
  })

  it('should guard ownership against stuck state setting owner as 0x0 address', async function () {
    let originalOwner = await ownable.owner()
    try {
      await ownable.transferOwnership(null, {from: originalOwner})
    } catch (error) {
      assertJump(error)
    }
  })
})