slapp-testing-stubs.js

const slapp = require('slapp')

slapp.message('^(hi|hello|hey).*', ['direct_mention', 'direct_message'], helloHandler)

// Pull slapp message handler into a function you can export and test
function helloHandler (msg, text, greeting) {
  msg.say(`${greeting}, how are you?`)
}

// write a test for just the handler
describe('hello handler', () => {
  it('should reply w/ greeting', () => {
    let msg = {}
    let sayStub = sinon.stub(msg, 'say')

    helloHandler(msg, '', 'hello')
    assert(sayStub.calledWith('hello, how are you?'))
  })
})