Merge pull request #337 from jxnblk/refactor-modes

Refactor to use hooks

CHANGELOG.md

@@ -5,6 +5,11 @@
 - Refactor localStorage to use hooks #334
 - Refactor keyboard shortcuts #335
 - Refactor query string to use hooks #336
+- Refactor to use hooks #337
+  - Adds `MDXDeckState` provider component
+  - Fixes an issue with rerenders in Gatsby theme
+  - Adjusts styles in grid mode
+  - Refactors `useSteps` to use effect hook
 
 ## v2.2.3 2019-04-20
 

docs/demo.mdx

@@ -57,8 +57,10 @@ import { Box } from '@rebass/emotion'
 ```
 
 <Notes>
-These are speaker notes
+
+- These are speaker notes
 - And they won't be rendered in your slide
+
 </Notes>
 
 ---

package.json

@@ -10,6 +10,9 @@
     "start": "yarn workspace @mdx-deck/docs start",
     "analyze-bundle": "yarn workspace @mdx-deck/docs start --webpack bundle-analyzer.config.js",
     "build": "yarn workspace @mdx-deck/docs build",
+    "start-theme": "yarn workspace @mdx-deck/gatsby-theme start",
+    "build-theme": "yarn workspace @mdx-deck/gatsby-theme build",
+    "export": "yarn workspace @mdx-deck/export pdf",
     "test": "jest"
   },
   "devDependencies": {

packages/components/package.json

@@ -21,6 +21,7 @@
   "devDependencies": {
     "react": "^16.8.3",
     "react-dom": "^16.8.3",
-    "react-test-renderer": "^16.8.4"
+    "react-test-renderer": "^16.8.4",
+    "react-testing-library": "^6.1.2"
   }
 }

packages/components/src/Grid.js

@@ -1,22 +1,9 @@
 import React, { useEffect } from 'react'
-import { Location, navigate } from '@reach/router'
 import Zoom from './Zoom'
 import Slide from './Slide'
 
-const getIndex = ({ pathname }) => {
-  return Number(pathname.split('/')[1] || 0)
-}
-
-const withLocation = Component => props => (
-  <Location
-    children={({ location }) => (
-      <Component {...props} location={location} index={getIndex(location)} />
-    )}
-  />
-)
-
-export const Grid = withLocation(props => {
-  const { index, slides, modes, update, basepath } = props
+export const Grid = props => {
+  const { index, slides, modes, update, goto } = props
   const activeThumb = React.createRef()
 
   useEffect(() => {
@@ -49,18 +36,19 @@ export const Grid = withLocation(props => {
             key={i}
             role="link"
             onClick={e => {
-              navigate(basepath + '/' + i)
+              goto(i)
               update({ mode: modes.NORMAL })
             }}
             style={{
               display: 'block',
-              width: '25vw',
-              height: '25vh',
-              padding: '2px',
+              width: 'calc(25vw - 4px)',
+              height: 'calc(25vh - 4px)',
+              margin: '2px',
               overflow: 'hidden',
               color: 'inherit',
               textDecoration: 'none',
               cursor: 'pointer',
+              outline: i === index ? '4px solid #0cf' : null,
             }}
           >
             <Zoom zoom={1 / 4}>
@@ -73,6 +61,6 @@ export const Grid = withLocation(props => {
       </div>
     </div>
   )
-})
+}
 
 export default Grid

packages/components/src/Head.js

@@ -20,6 +20,7 @@ export const HeadProvider = ({ tags = [], children }) => {
 
 // get head for all slides
 export const UserHead = ({ mdx }) =>
+  !!mdx &&
   React.createElement(mdx, {
     components: {
       wrapper: props => {

packages/components/src/Keyboard.js

@@ -69,21 +69,13 @@ const handleKeyDown = props => e => {
   }
 }
 
-export const Keyboard = props => {
+export default props => {
   useEffect(() => {
     const handler = handleKeyDown(props)
     window.addEventListener('keydown', handler)
     return () => {
       window.removeEventListener('keydown', handler)
     }
-  }, [])
+  }, [props.metadata])
   return false
 }
-
-const noop = () => {}
-
-Keyboard.defaultProps = {
-  setState: noop,
-}
-
-export default Keyboard

packages/components/src/MDXDeck.js

@@ -1,8 +1,10 @@
-import React from 'react'
+import React, { useContext, useReducer, useMemo } from 'react'
 import PropTypes from 'prop-types'
 import { Router, globalHistory, navigate } from '@reach/router'
 import { Global } from '@emotion/core'
 import { Swipeable } from 'react-swipeable'
+import merge from 'lodash.merge'
+
 import Provider from './Provider'
 import Slide from './Slide'
 import Presenter from './Presenter'
@@ -11,9 +13,10 @@ import Grid from './Grid'
 import Print from './Print'
 import GoogleFonts from './GoogleFonts'
 import Catch from './Catch'
-import QueryString from './QueryString'
 import Keyboard from './Keyboard'
 import Storage from './Storage'
+import QueryString from './QueryString'
+import Style from './Style'
 
 const NORMAL = 'normal'
 const PRESENTER = 'presenter'
@@ -30,156 +33,152 @@ const modes = {
 
 const BaseWrapper = props => <>{props.children}</>
 
-export class MDXDeck extends React.Component {
-  constructor(props) {
-    super(props)
+const getIndex = ({ basepath }) => {
+  const { pathname } = globalHistory.location
+  const root = pathname.replace(basepath, '')
+  const n = Number(root.split('/')[1])
+  const index = isNaN(n) ? 0 : n
+  return index
+}
 
-    this.state = {
-      slides: props.slides,
-      step: 0,
-      mode: NORMAL,
-      update: fn => this.setState(fn),
-    }
+const mergeState = (state, next) =>
+  merge({}, state, typeof next === 'function' ? next(state) : next)
+const useState = init => useReducer(mergeState, init)
+
+const getWrapper = mode => {
+  switch (mode) {
+    case PRESENTER:
+      return Presenter
+    case OVERVIEW:
+      return Overview
+    case GRID:
+      return Grid
+    default:
+      return BaseWrapper
+      break
+  }
+}
+
+export const MDXDeckContext = React.createContext()
+
+const useDeckState = () => {
+  const context = useContext(MDXDeckContext)
+  if (context) return context
+
+  const [state, setState] = useState({
+    metadata: {},
+    step: 0,
+    mode: NORMAL,
+  })
+
+  return {
+    state,
+    setState,
+  }
+}
+
+export const MDXDeckState = ({ children }) => {
+  const context = useDeckState()
+  return <MDXDeckContext.Provider value={context} children={children} />
+}
+
+export const MDXDeck = props => {
+  const { slides, basepath } = props
+  const { state, setState } = useDeckState(MDXDeckContext)
+
+  const index = getIndex(props)
+
+  const getMeta = i => {
+    return state.metadata[i] || {}
   }
 
-  getIndex = () => {
-    const { basepath } = this.props
-    const { pathname } = globalHistory.location
-    const pagepath = pathname.replace(basepath, '')
-    const n = Number(pagepath.split('/')[1])
-    const index = isNaN(n) ? 0 : n
-    return index
+  const register = (index, meta) => {
+    setState({
+      metadata: {
+        ...state.metadata,
+        [index]: {
+          ...state.metadata[index],
+          ...meta,
+        },
+      },
+    })
   }
 
-  getMeta = i => {
-    const { slides } = this.state
-    const { meta = {} } = slides[i] || {}
-    return meta
-  }
-
-  goto = i => {
-    const { basepath } = this.props
-    const current = this.getIndex()
-    const reverse = i < current
-    navigate(basepath + '/' + i)
-    const meta = this.getMeta(i)
-    this.setState({
+  const goto = nextIndex => {
+    const current = getIndex(props)
+    const reverse = nextIndex < current
+    const { search } = globalHistory.location
+    navigate(basepath + '/' + nextIndex + search)
+    const meta = getMeta(nextIndex)
+    setState({
       step: reverse ? meta.steps || 0 : 0,
     })
   }
 
-  previous = () => {
-    const { step } = this.state
-    const index = this.getIndex()
-    const meta = this.getMeta(index)
-    if (meta.steps && step > 0) {
-      this.setState(state => ({
-        step: state.step - 1,
-      }))
+  const previous = () => {
+    const current = getIndex(props)
+    const meta = getMeta(current)
+    if (meta.steps && state.step > 0) {
+      setState({ step: state.step - 1 })
     } else {
-      const previous = index - 1
-      if (previous < 0) return
-      this.goto(previous)
+      const p = current - 1
+      if (p < 0) return
+      goto(p)
     }
   }
 
-  next = () => {
-    const { slides, step } = this.state
-    const index = this.getIndex()
-    const meta = this.getMeta(index)
-    if (meta.steps && step < meta.steps) {
-      this.setState(state => ({
-        step: state.step + 1,
-      }))
+  const next = () => {
+    const current = getIndex(props)
+    const meta = getMeta(current)
+    if (meta.steps && state.step < meta.steps) {
+      setState({ step: state.step + 1 })
     } else {
-      const next = index + 1
-      if (next > slides.length - 1) return
-      this.goto(next)
+      const n = current + 1
+      if (n > slides.length - 1) return
+      goto(n)
     }
   }
 
-  register = (index, meta) => {
-    const { slides } = this.state
-    const initialMeta = slides[index].meta || {}
-    slides[index].meta = { ...initialMeta, ...meta }
-    this.setState({ slides })
+  const context = {
+    ...state,
+    update: setState,
+    register,
+    modes,
+    index,
+    goto,
+    previous,
+    next,
   }
 
-  componentDidCatch(err) {
-    console.error('componentDidCatch')
-    console.error(err)
-  }
+  const [First] = slides
+  const Wrapper = getWrapper(state.mode)
 
-  render() {
-    const { basepath } = this.props
-    const { pathname } = globalHistory.location
-    const { slides } = this.state
-    const pagepath = pathname.replace(basepath, '')
-    const mode = pagepath === '/print' ? PRINT : this.state.mode
-    const index = this.getIndex()
-    const context = {
-      ...this.state,
-      register: this.register,
-      modes,
-      previous: this.previous,
-      next: this.next,
-    }
-
-    const [FirstSlide] = slides
-
-    let Wrapper = BaseWrapper
-    switch (mode) {
-      case PRESENTER:
-        Wrapper = Presenter
-        break
-      case OVERVIEW:
-        Wrapper = Overview
-        break
-      case GRID:
-        Wrapper = Grid
-        break
-      default:
-        break
-    }
-
-    const style =
-      mode !== modes.PRINT ? (
-        <Global
-          styles={{
-            body: {
-              overflow: 'hidden',
-            },
-          }}
-        />
-      ) : null
-
-    return (
-      <Provider {...this.props} {...this.state} mode={mode} index={index}>
-        {style}
-        <Catch>
-          <QueryString {...this.state} modes={modes} index={index} />
-          <Keyboard {...this.props} {...context} />
-          <Storage {...this.state} goto={this.goto} index={index} />
-          <GoogleFonts />
-          <Wrapper {...this.props} {...this.state} modes={modes} index={index}>
-            <Swipeable onSwipedRight={this.previous} onSwipedLeft={this.next}>
-              <Router basepath={basepath}>
-                <Slide path="/" index={0} context={context}>
-                  <FirstSlide path="/" />
+  return (
+    <Provider {...props} {...context}>
+      <Catch>
+        <Style {...context} />
+        <Keyboard {...props} {...context} />
+        <Storage {...context} />
+        <QueryString {...context} />
+        <GoogleFonts />
+        <Wrapper {...props} {...context}>
+          <Swipeable onSwipedRight={previous} onSwipedLeft={next}>
+            <Router basepath={basepath}>
+              <Slide path="/" index={0} context={context}>
+                <First path="/" />
+              </Slide>
+              {slides.map((Component, i) => (
+                <Slide key={i} path={i + '/*'} index={i} context={context}>
+                  <Component path={i + '/*'} />
                 </Slide>
-                {slides.map((Component, i) => (
-                  <Slide key={i} path={i + '/*'} index={i} {...context}>
-                    <Component path={i + '/*'} />
-                  </Slide>
-                ))}
-                <Print path="print" {...this.props} />
-              </Router>
-            </Swipeable>
-          </Wrapper>
-        </Catch>
-      </Provider>
-    )
-  }
+              ))}
+              <Print path="print" {...props} />
+            </Router>
+          </Swipeable>
+        </Wrapper>
+      </Catch>
+    </Provider>
+  )
 }
 
 MDXDeck.propTypes = {

packages/components/src/Notes.js

@@ -1,25 +1,17 @@
-import React from 'react'
-import { withContext } from './context'
+import React, { useEffect } from 'react'
+import { useDeck } from './context'
 
-export const Notes = withContext(
-  class extends React.Component {
-    constructor(props) {
-      super(props)
-      const { context, children } = props
-      if (
-        !context ||
-        typeof context.index === 'undefined' ||
-        typeof context.register !== 'function'
-      ) {
-        return
-      }
-      context.register(context.index, { notes: children })
-    }
+export const Notes = props => {
+  const context = useDeck()
+  useEffect(() => {
+    if (!context || !context.register) return
+    if (typeof context.index === 'undefined') return
+    context.register(context.index, {
+      notes: props.children,
+    })
+  }, [])
 
-    render() {
-      return false
-    }
-  }
-)
+  return false
+}
 
 export default Notes

packages/components/src/Overview.js

@@ -1,13 +1,10 @@
 import React, { useEffect } from 'react'
-import { navigate } from '@reach/router'
 import Zoom from './Zoom'
 import Slide from './Slide'
 import Pre from './Pre'
 
-const query = '?mode=overview'
-
 export const Overview = props => {
-  const { index, slides, basepath } = props
+  const { goto, index, slides } = props
   const activeThumb = React.createRef()
 
   useEffect(() => {
@@ -44,7 +41,7 @@ export const Overview = props => {
             key={i}
             role="link"
             onClick={e => {
-              navigate(basepath + '/' + i + query)
+              goto(i)
             }}
             style={{
               display: 'block',

packages/components/src/Presenter.js

@@ -6,10 +6,10 @@ import Pre from './Pre'
 import Clock from './Clock'
 
 export const Presenter = props => {
-  const { slides, index } = props
+  const { slides, metadata, index } = props
   const Current = slides[index]
   const Next = slides[index + 1]
-  const { notes } = Current.meta || {}
+  const { notes } = metadata[index] || {}
 
   return (
     <div

packages/components/src/QueryString.js

@@ -25,7 +25,7 @@ export default ({ mode, modes, update, index }) => {
       if (!search) return
       navigate(pathname)
     }
-  }, [index, mode])
+  }, [mode])
 
   return false
 }

packages/components/src/Slide.js

@@ -72,7 +72,6 @@ export const Slide = ({ index, context, ...props }) => (
     value={{
       index,
       ...context,
-      ...props,
     }}
   >
     <Root {...props} />
@@ -80,7 +79,9 @@ export const Slide = ({ index, context, ...props }) => (
 )
 
 Slide.defaultProps = {
-  step: Infinity,
+  context: {
+    step: Infinity,
+  },
 }
 
 export default Slide

packages/components/src/Steps.js

@@ -1,21 +1,10 @@
 import React from 'react'
-import { withContext } from './context'
+import { useDeck } from './context'
+import useSteps from './useSteps'
 
-export const Steps = withContext(
-  class extends React.Component {
-    constructor(props) {
-      super(props)
-      const { register, index } = props.context
-      const { length } = props
-      if (typeof register !== 'function') return
-      register(index, { steps: length })
-    }
-    render() {
-      const { context, render } = this.props
-      const { step } = context
-      return render({ step })
-    }
-  }
-)
+export const Steps = props => {
+  const step = useSteps(props.length)
+  return props.render({ step })
+}
 
 export default Steps

packages/components/src/Storage.js

@@ -1,15 +1,27 @@
-import { useEffect } from 'react'
+import { useEffect, useState } from 'react'
 
 const STORAGE_INDEX = 'mdx-slide'
 const STORAGE_STEP = 'mdx-step'
 
 export const useLocalStorage = (handler, args = []) => {
+  const [focused, setFocused] = useState(false)
+  const handleFocus = () => {
+    setFocused(true)
+  }
+  const handleBlur = () => {
+    setFocused(false)
+  }
   useEffect(() => {
-    window.addEventListener('storage', handler)
+    setFocused(document.hasFocus())
+    if (!focused) window.addEventListener('storage', handler)
+    window.addEventListener('focus', handleFocus)
+    window.addEventListener('blur', handleBlur)
     return () => {
-      window.removeEventListener('storage', handler)
+      if (!focused) window.removeEventListener('storage', handler)
+      window.removeEventListener('focus', handleFocus)
+      window.removeEventListener('blur', handleBlur)
     }
-  }, [...args])
+  }, [focused, ...args])
 }
 
 export const useSetStorage = (key, value) => {

packages/components/src/Style.js

@@ -0,0 +1,24 @@
+import React from 'react'
+import { globalHistory } from '@reach/router'
+import { Global } from '@emotion/core'
+
+const isPrintPath = () => {
+  const { pathname } = globalHistory.location
+  const parts = pathname.split('/')
+  const path = parts[parts.length - 1]
+  return path === 'print'
+}
+
+export default ({ mode, modes }) => {
+  if (mode === modes.PRINT) return false
+  if (isPrintPath()) return false
+  return (
+    <Global
+      styles={{
+        body: {
+          overflow: 'hidden',
+        },
+      }}
+    />
+  )
+}

packages/components/src/__tests__/MDXDeck.js

@@ -0,0 +1,35 @@
+import React, { useContext } from 'react'
+import { render, cleanup } from 'react-testing-library'
+import renderer from 'react-test-renderer'
+import { MDXDeckState, MDXDeckContext, MDXDeck } from '../MDXDeck'
+
+afterEach(cleanup)
+
+const slides = [() => <pre>one</pre>, () => <pre>two</pre>]
+
+describe('MDXDeckState', () => {
+  test('provides state', () => {
+    let context
+    const Consumer = props => {
+      context = useContext(MDXDeckContext)
+      return false
+    }
+    const deck = renderer.create(
+      <MDXDeckState>
+        <Consumer />
+      </MDXDeckState>
+    )
+    expect(typeof context.state).toBe('object')
+    expect(typeof context.state.metadata).toBe('object')
+    expect(context.state.step).toBe(0)
+    expect(context.state.mode).toBe('normal')
+    expect(typeof context.setState).toBe('function')
+  })
+
+  test.todo('setState updates state')
+})
+
+test('renders', () => {
+  const json = renderer.create(<MDXDeck slides={slides} />).toJSON()
+  expect(json).toMatchSnapshot()
+})

packages/components/src/__tests__/__snapshots__/MDXDeck.js.snap

@@ -0,0 +1,33 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`renders 1`] = `
+<div>
+  <div
+    role="group"
+    style={
+      Object {
+        "outline": "none",
+      }
+    }
+    tabIndex="-1"
+  >
+    <div
+      className="css-suf238-Root ekm8v3h0"
+    >
+      <div
+        role="group"
+        style={
+          Object {
+            "outline": "none",
+          }
+        }
+        tabIndex="-1"
+      >
+        <pre>
+          one
+        </pre>
+      </div>
+    </div>
+  </div>
+</div>
+`;

packages/components/src/context.js

@@ -1,11 +1,11 @@
+// slide context
 import React, { useContext } from 'react'
 
 export const Context = React.createContext({})
 
-export const withContext = Component => props => (
-  <Context.Consumer
-    children={context => <Component {...props} context={context} />}
-  />
-)
-
 export const useDeck = () => useContext(Context)
+
+export const withContext = Component => props => {
+  const context = useDeck()
+  return <Component {...props} context={context} />
+}

packages/components/src/index.js

@@ -1,4 +1,4 @@
-export { MDXDeck } from './MDXDeck'
+export { MDXDeck, MDXDeckState } from './MDXDeck'
 export { Head } from './Head'
 export { Image } from './Image'
 export { Notes } from './Notes'

packages/components/src/useSteps.js

@@ -1,10 +1,10 @@
-import { useContext, useMemo } from 'react'
+import { useContext, useEffect } from 'react'
 import { Context } from './context'
 
 export default length => {
   const context = useContext(Context)
   const { register, index, step } = context
-  useMemo(() => {
+  useEffect(() => {
     if (typeof register !== 'function') return
     register(index, { steps: length })
   }, [length])

packages/export/index.js

@@ -23,7 +23,8 @@ module.exports = async opts => {
 
   switch (type) {
     case 'pdf':
-      await page.goto(`http://localhost:${port}/print`, {
+      const url = `http://localhost:${port}/print`
+      await page.goto(url, {
         waitUntil: 'networkidle2',
       })
       await page.pdf({

packages/export/package.json

@@ -8,8 +8,8 @@
     "mdx-deck-export": "./cli.js"
   },
   "scripts": {
-    "pdf": "./cli.js pdf ../../docs/demo.mdx",
-    "png": "./cli.js png ../../docs/demo.mdx"
+    "pdf": "./cli.js pdf ../../docs/demo.mdx -d ../../docs/dist",
+    "png": "./cli.js png ../../docs/demo.mdx -d ../../docs/dist"
   },
   "dependencies": {
     "mdx-deck": "^2.2.3",

packages/gatsby-theme/gatsby-browser.js

@@ -0,0 +1 @@
+export { wrapPageElement } from './src'

packages/gatsby-theme/src/index.js

@@ -1 +1,6 @@
-export default {}
+import React from 'react'
+import { MDXDeckState } from '@mdx-deck/components'
+
+export const wrapPageElement = ({ props, element }) => (
+  <MDXDeckState key={props.pageContext.basepath}>{element}</MDXDeckState>
+)

packages/gatsby-theme/src/layouts/deck.js

@@ -1,22 +1,17 @@
 import React from 'react'
-import { MDXProvider } from '@mdx-js/react'
 import { MDXDeck, splitSlides } from '@mdx-deck/components'
 import Root from './root'
 
-const wrapper = page => props => (
-  <MDXDeck
-    {...splitSlides({ ...props })}
-    basepath={page.pageContext.basepath}
-  />
-)
+const wrapper = props => <MDXDeck {...splitSlides({ ...props })} />
 
-export default props => {
-  const components = {
-    wrapper: wrapper(props),
-  }
+const components = {
+  wrapper,
+}
+
+export default ({ Component, ...props }) => {
   return (
     <Root>
-      <MDXProvider components={components}>{props.children}</MDXProvider>
+      <Component {...props} components={components} />
     </Root>
   )
 }

packages/gatsby-theme/src/templates/deck.js

@@ -5,8 +5,9 @@ import Layout from '../layouts/deck'
 
 export default props => {
   const { mdx } = props.data
-  const children = <MDXRenderer children={mdx.code.body} />
-  return <Layout {...props} children={children} />
+  const Component = props => <MDXRenderer {...props} children={mdx.code.body} />
+
+  return <Layout Component={Component} basepath={props.pageContext.basepath} />
 }
 
 export const query = graphql`

yarn.lock

@@ -747,7 +747,7 @@
   dependencies:
     regenerator-runtime "^0.12.0"
 
-"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.3.1", "@babel/runtime@^7.4.2":
+"@babel/runtime@^7.0.0", "@babel/runtime@^7.1.2", "@babel/runtime@^7.3.1", "@babel/runtime@^7.3.4", "@babel/runtime@^7.4.2":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/runtime/-/runtime-7.4.3.tgz#79888e452034223ad9609187a0ad1fe0d2ad4bdc"
   integrity sha512-9lsJwJLxDh/T3Q3SZszfWOTkk3pHbkmH+3KY+zwIDmsNlxsumuhS2TH3NIpktU4kNvfzy+k3eLT7aTJSPTo0OA==
@@ -1823,6 +1823,11 @@
   dependencies:
     any-observable "^0.3.0"
 
+"@sheerun/mutationobserver-shim@^0.3.2":
+  version "0.3.2"
+  resolved "https://registry.yarnpkg.com/@sheerun/mutationobserver-shim/-/mutationobserver-shim-0.3.2.tgz#8013f2af54a2b7d735f71560ff360d3a8176a87b"
+  integrity sha512-vTCdPp/T/Q3oSqwHmZ5Kpa9oI7iLtGl3RQaA/NyLHikvcrPxACkkKVr/XzkSPJWXHRhKGzVvb0urJsbMlRxi1Q==
+
 "@stefanprobst/lokijs@^1.5.6-b":
   version "1.5.6-b"
   resolved "https://registry.yarnpkg.com/@stefanprobst/lokijs/-/lokijs-1.5.6-b.tgz#6a36a86dbe132e702e6b15ffd3ce4139aebfe942"
@@ -5002,6 +5007,16 @@ dom-serializer@0, dom-serializer@~0.1.0:
     domelementtype "^1.3.0"
     entities "^1.1.1"
 
+dom-testing-library@^3.19.0:
+  version "3.19.3"
+  resolved "https://registry.yarnpkg.com/dom-testing-library/-/dom-testing-library-3.19.3.tgz#fba399987be1bdd57b07c4bc3ef46c3c084b26d9"
+  integrity sha512-oiI+oq91iO/Vpp+pt8PqfqLfBK074FH0eprhoFNvBCvJOk7vL4ozbe/yj/kEEGR6kiT4F3MAam19AX1fdGFjrA==
+  dependencies:
+    "@babel/runtime" "^7.3.4"
+    "@sheerun/mutationobserver-shim" "^0.3.2"
+    pretty-format "^24.5.0"
+    wait-for-expect "^1.1.0"
+
 dom-walk@^0.1.0:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/dom-walk/-/dom-walk-0.1.1.tgz#672226dc74c8f799ad35307df936aba11acd6018"
@@ -11470,7 +11485,7 @@ pretty-error@^2.1.1:
     renderkid "^2.0.1"
     utila "~0.4"
 
-pretty-format@^24.7.0:
+pretty-format@^24.5.0, pretty-format@^24.7.0:
   version "24.7.0"
   resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-24.7.0.tgz#d23106bc2edcd776079c2daa5da02bcb12ed0c10"
   integrity sha512-apen5cjf/U4dj7tHetpC7UEFCvtAgnNZnBDkfPv3fokzIqyOJckAG9OlAPC1BlFALnqT/lGB2tl9EJjlK6eCsA==
@@ -11901,6 +11916,14 @@ react-test-renderer@^16.8.4:
     react-is "^16.8.6"
     scheduler "^0.13.6"
 
+react-testing-library@^6.1.2:
+  version "6.1.2"
+  resolved "https://registry.yarnpkg.com/react-testing-library/-/react-testing-library-6.1.2.tgz#f6bba6eeecedac736eb00b22b4c70bae04535a4f"
+  integrity sha512-z69lhRDGe7u/NOjDCeFRoe1cB5ckJ4656n0tj/Fdcr6OoBUu7q9DBw0ftR7v5i3GRpdSWelnvl+feZFOyXyxwg==
+  dependencies:
+    "@babel/runtime" "^7.4.2"
+    dom-testing-library "^3.19.0"
+
 react@^16.8.3, react@^16.8.6:
   version "16.8.6"
   resolved "https://registry.yarnpkg.com/react/-/react-16.8.6.tgz#ad6c3a9614fd3a4e9ef51117f54d888da01f2bbe"
@@ -14432,6 +14455,11 @@ w3c-hr-time@^1.0.1:
   dependencies:
     browser-process-hrtime "^0.1.2"
 
+wait-for-expect@^1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/wait-for-expect/-/wait-for-expect-1.1.1.tgz#9cd10e07d52810af9e0aaf509872e38f3c3d81ae"
+  integrity sha512-vd9JOqqEcBbCDhARWhW85ecjaEcfBLuXgVBqatfS3iw6oU4kzAcs+sCNjF+TC9YHPImCW7ypsuQc+htscIAQCw==
+
 walker@^1.0.7, walker@~1.0.5:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/walker/-/walker-1.0.7.tgz#2f7f9b8fd10d677262b18a884e28d19618e028fb"