WIKIPEDIA proxyquire-argumentvalidation.js

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'use strict'

var assert = require('assert')
var proxyquire = require('..')

describe('Illegal parameters to resolve give meaningful errors', function () {
  var bar = { bar: function () { return 'bar' } }

function throws (action, regex) {
    assert.throws(action, function (err) {
      return err.name === 'ProxyquireError' && regex.test(err.message) && regex.test(err.toString())
    })
  }

describe('when I pass no request', function () {
    function act () {
      proxyquire(null, {})
    }

it('throws an exception explaining that a request path must be provided', function () {
      throws(act, /missing argument: "request"/i)
    })
  })

describe('when I pass an object as a request', function () {
    function act () {
      proxyquire({ }, { './bar': bar })
    }

it('throws an exception explaining that request needs to be a requirable string', function () {
      throws(act, /invalid argument: "request".+needs to be a requirable string/i)
    })
  })

describe('when I pass no stubs', function () {
    function act () {
      proxyquire('./samples/foo')
    }

it('throws an exception explaining that resolve without stubs makes no sense', function () {
      throws(act, /missing argument: "stubs".+use regular require instead/i)
    })
  })

describe('when I pass a string as stubs', function () {
    function act () {
      proxyquire('./samples/foo', 'stubs')
    }

it('throws an exception explaining that stubs need to be an object', function () {
      throws(act, /invalid argument: "stubs".+needs to be an object/i)
    })
  })

describe('when I pass an undefined stub', function () {
    function act () {
      proxyquire('./samples/foo', {
        myStub: undefined
      })
    }

it('throws an exception with the stub key', function () {
      throws(act, /Invalid stub: "myStub" cannot be undefined/)
    })
  })
})