@coriolis/coriolis/src/test/lib/function/throwFalsy.spec.js

Event sourced effect management

import { throwFalsy } from '../../../lib/function/throwFalsy'

describe('throwFalsy', () => {
  it(`Given a validator and an error object
      And an argument for the validator
      When throwFalsy is called with those
      And validation is truthy
      Then throwFalsy should just return undefined
  `, () => {
    const validator = sinon.stub().returns(true)
    const error = new Error('error')

    const result = throwFalsy(validator, error)('arg')

    expect(result).to.be.undefined()
    expect(validator).to.have.been.calledWith('arg')
  })

  it(`Given a validator and an error object
      And an argument for the validator
      When throwFalsy is called with those
      And validation is falsy
      Then throwFalsy should throw the error object
  `, () => {
    const validator = sinon.stub().returns(false)
    const error = new Error('error')

    const experiment = () => throwFalsy(validator, error)('arg')

    expect(experiment).to.throw(error)
    expect(validator).to.have.been.calledWith('arg')
  })
})