TypeError: Cannot convert undefined or null to object (cleanYamlObj)

[tony-kerz]

the above error is triggered by the following code (which should just report a test failure):

import test from 'ava'
import React from 'react'
import {mount} from 'enzyme'

test('should kinda work', t => {
  const wrapper = mount(<div>foo</div>)
  t.is(wrapper.find('.does-not-exist').length, 1)
})

strangely, when the test is altered to pass, no such exception is thrown:

  t.is(wrapper.find('.does-not-exist').length, 0)

also observed that the issue does not surface when using enzyme shallow or render methods (just mount)

the rest of the project configuration can be found here for reference.

versions

node: 6.2.2
ava: 0.15.2
react: 15.1.0
enzyme: 2.3.0

stack trace

Warning: Element: `key` is not a prop. Trying to access it will result in `undefined` being returned. If you need to access the same value within the child component, you should pass it as a different prop. (https://fb.me/react-special-props)
Warning: Element: `ref` is not a prop. Trying to access it will result in `undefined` being returned. If you need to access the same value within the child component, you should pass it as a different prop. (https://fb.me/react-special-props)

   2 exceptions


   1. Uncaught Exception
   TypeError: Cannot convert undefined or null to object
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:12:17)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    setProp (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:84:22)
    /Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:73:4
    cleanYamlObj (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:57:15)
    module.exports (/Users/tony/git/react-drop-wrapper/node_modules/clean-yaml-object/index.js:3:9)
    _combinedTickCallback (internal/process/next_tick.js:67:7)
    process._tickCallback (internal/process/next_tick.js:98:9)


   ✖ Test results were not received from test/index-test.js

[tony-kerz]

fwiw, witnessing similar with:

  t.true(wrapper.hasClass('does-not-exist'))

[novemberborn]

This is fixed in master. If I were to guess, due to #903.

@tony-kerz please try installing AVA from GitHub until the next release is out. Or avoid bugs so your tests don't fail 😜

[tony-kerz]

@novemberborn oh yeah, my code never has bugs, it's the other devs i'm worried about 😆