'use strict'
  
  var tap = require('tap')
  var test = tap.test
  var sinon = require('sinon')
  var shimmer = require('../index.js')
  
  test('shimmer initialization', function (t) {
    t.plan(4)
  
    t.doesNotThrow(function () { shimmer() })
  
    var mock = sinon.expectation
      .create('logger')
      .withArgs('no original function undefined to wrap')
      .once()
  
    t.doesNotThrow(function () {
      shimmer({logger: mock})
    }, "initializer doesn't throw")
  
    t.doesNotThrow(function () {
      shimmer.wrap()
    }, "invoking the wrap method with no params doesn't throw")
  
    t.doesNotThrow(function () {
      mock.verify()
    }, 'logger method was called with the expected message')
  })
  
  test('shimmer initialized with non-function logger', function (t) {
    t.plan(2)
  
    var mock = sinon.expectation
      .create('logger')
      .withArgs("new logger isn't a function, not replacing")
      .once()
  
    shimmer({logger: mock})
  
    t.doesNotThrow(function () {
      shimmer({logger: {ham: 'chunx'}})
    }, "even bad initialization doesn't throw")
  
    t.doesNotThrow(function () {
      mock.verify()
    }, 'logger initialization failed in the expected way')
  })