Improve stability and speed of E2E tests (#1319)

* Change cypress settings in CI job
* Catch error from highlight js chunk loading in auto completion
* Refactor code
* Show notification if highlightjs loading failed

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

.github/workflows/e2e.yml

@@ -18,16 +18,16 @@ jobs:
       - name: Check out repo
         uses: actions/checkout@v2
 
-      - name: Get yarn cache directory path
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-
       - name: Cache build
         uses: actions/cache@v2.1.6
         with:
           path: build
           key: build
 
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+
       - name: Cache node_modules
         uses: actions/cache@v2
         id: yarn-cache
@@ -57,6 +57,9 @@ jobs:
     name: Perform E2E Test in ${{ matrix.browser }}
     needs: build-frontend
     runs-on: ubuntu-latest
+    container:
+      image: cypress/browsers:node14.16.0-chrome90-ff88
+      options: --user 1001 --shm-size=2g
     strategy:
       matrix:
         browser: [ 'chrome', 'firefox' ]

public/locales/en.json

@@ -461,6 +461,7 @@
         "successfullyCopied": "Copied!",
         "copyError": "Error while copying!",
         "errorOccurred": "An error occurred",
+        "errorWhileLoadingLibrary": "An unexpected error occurred while loading '{{name}}'.\nCheck the browser console for more information.\nReport this error only if it comes up again.",
         "readForMoreInfo": "Read here for more information"
     },
     "login": {

src/components/editor-page/editor-pane/autocompletion/code-block.ts

@@ -5,45 +5,111 @@
  */
 
 import { Editor, Hint, Hints, Pos } from 'codemirror'
-import { findWordAtCursor, Hinter, search } from './index'
+import { findWordAtCursor, generateHintListByPrefix, Hinter } from './index'
+import { DEFAULT_DURATION_IN_SECONDS, dispatchUiNotification } from '../../../../redux/ui-notifications/methods'
+import i18n from 'i18next'
+
+type highlightJsImport = typeof import('../../../common/hljs/hljs')
 
 const wordRegExp = /^```((\w|-|_|\+)*)$/
 let allSupportedLanguages: string[] = []
 
-const codeBlockHint = (editor: Editor): Promise<Hints | null> => {
-  return import(/* webpackChunkName: "highlight.js" */ '../../../common/hljs/hljs').then(
-    (hljs) =>
-      new Promise((resolve) => {
+/**
+ * Fetches the highlight js chunk.
+ * @return the retrieved highlight js api
+ */
+const loadHighlightJs = async (): Promise<highlightJsImport | null> => {
+  try {
+    return await import('../../../common/hljs/hljs')
+  } catch (error) {
+    dispatchUiNotification(
+      i18n.t('common.errorOccurred'),
+      i18n.t('common.errorWhileLoadingLibrary', { name: 'highlight.js' }),
+      DEFAULT_DURATION_IN_SECONDS,
+      'exclamation-circle'
+    )
+    console.error("can't load highlight js", error)
+    return null
+  }
+}
+
+/**
+ * Extracts the language from the current line in the editor.
+ *
+ * @param editor The editor that contains the search time
+ * @return null if no search term could be found or the found word and the cursor position.
+ */
+const extractSearchTerm = (
+  editor: Editor
+): null | {
+  searchTerm: string
+  startIndex: number
+  endIndex: number
+} => {
   const searchTerm = findWordAtCursor(editor)
   const searchResult = wordRegExp.exec(searchTerm.text)
   if (searchResult === null) {
-          resolve(null)
-          return
+    return null
   }
-        const term = searchResult[1]
+
+  return {
+    searchTerm: searchResult[1],
+    startIndex: searchTerm.start,
+    endIndex: searchTerm.end
+  }
+}
+
+/**
+ * Builds the list of languages that are supported by highlight js or custom embeddings.
+ * @return An array of language names
+ */
+const buildLanguageList = async (): Promise<string[]> => {
+  const highlightJs = await loadHighlightJs()
+
+  if (highlightJs === null) {
+    return []
+  }
+
   if (allSupportedLanguages.length === 0) {
-          allSupportedLanguages = hljs.default
+    allSupportedLanguages = highlightJs.default
       .listLanguages()
       .concat('csv', 'flow', 'html', 'js', 'markmap', 'abc', 'graphviz', 'mermaid', 'vega-lite')
   }
-        const suggestions = search(term, allSupportedLanguages)
-        const cursor = editor.getCursor()
+
+  return allSupportedLanguages
+}
+
+/**
+ * Creates a codemirror autocompletion hint with supported highlight js languages.
+ *
+ * @param editor The codemirror editor that requested the autocompletion
+ * @return The generated {@link Hints} or null if no hints exist.
+ */
+const codeBlockHint = async (editor: Editor): Promise<Hints | null> => {
+  const searchResult = extractSearchTerm(editor)
+  if (!searchResult) {
+    return null
+  }
+
+  const languages = await buildLanguageList()
+  if (languages.length === 0) {
+    return null
+  }
+  const suggestions = generateHintListByPrefix(searchResult.searchTerm, languages)
   if (!suggestions) {
-          resolve(null)
-        } else {
-          resolve({
+    return null
+  }
+  const lineIndex = editor.getCursor().line
+  return {
     list: suggestions.map(
       (suggestion: string): Hint => ({
         text: '```' + suggestion + '\n\n```\n',
         displayText: suggestion
       })
     ),
-            from: Pos(cursor.line, searchTerm.start),
-            to: Pos(cursor.line, searchTerm.end)
-          })
+    from: Pos(lineIndex, searchResult.startIndex),
+    to: Pos(lineIndex, searchResult.endIndex)
   }
-      })
-  )
 }
 
 export const CodeBlockHinter: Hinter = {

src/components/editor-page/editor-pane/autocompletion/header.ts

@@ -5,7 +5,7 @@
  */
 
 import { Editor, Hint, Hints, Pos } from 'codemirror'
-import { findWordAtCursor, Hinter, search } from './index'
+import { findWordAtCursor, generateHintListByPrefix, Hinter } from './index'
 
 const wordRegExp = /^(\s{0,3})(#{1,6})$/
 const allSupportedHeaders = ['# h1', '## h2', '### h3', '#### h4', '##### h5', '###### h6', '###### tags: `example`']
@@ -24,7 +24,7 @@ const headerHint = (editor: Editor): Promise<Hints | null> => {
       resolve(null)
       return
     }
-    const suggestions = search(term, allSupportedHeaders)
+    const suggestions = generateHintListByPrefix(term, allSupportedHeaders)
     const cursor = editor.getCursor()
     if (!suggestions) {
       resolve(null)

src/components/editor-page/editor-pane/autocompletion/index.ts

@@ -46,14 +46,15 @@ export const findWordAtCursor = (editor: Editor): findWordAtCursorResponse => {
   }
 }
 
-export const search = (term: string, list: string[]): string[] => {
-  const suggestions: string[] = []
-  list.forEach((item) => {
-    if (item.toLowerCase().startsWith(term.toLowerCase())) {
-      suggestions.push(item)
-    }
-  })
-  return suggestions.slice(0, 7)
+/**
+ * Generates a list (with max 8 entries) of hints for the autocompletion.
+ *
+ * @param prefix This is the case insensitive prefix that every hint must have
+ * @param hintCandidates The list of hint candidates
+ */
+export const generateHintListByPrefix = (prefix: string, hintCandidates: string[]): string[] => {
+  const searchTerm = prefix.toLowerCase()
+  return hintCandidates.filter((item) => item.toLowerCase().startsWith(searchTerm)).slice(0, 7)
 }
 
 export const allHinters: Hinter[] = [

src/components/notifications/ui-notification-toast.tsx

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import React, { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
+import React, { Fragment, useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
 import { Button, ProgressBar, Toast } from 'react-bootstrap'
 import { UiNotification } from '../../redux/ui-notifications/types'
 import { ForkAwesomeIcon } from '../common/fork-awesome/fork-awesome-icon'
@@ -88,6 +88,17 @@ export const UiNotificationToast: React.FC<UiNotificationProps> = ({
     [buttons, dismissThisNotification]
   )
 
+  const contentDom = useMemo(() => {
+    return content.split('\n').map((value) => {
+      return (
+        <Fragment>
+          {value}
+          <br />
+        </Fragment>
+      )
+    })
+  }, [content])
+
   return (
     <Toast show={!dismissed && eta !== undefined} onClose={dismissThisNotification}>
       <Toast.Header>
@@ -99,7 +110,7 @@ export const UiNotificationToast: React.FC<UiNotificationProps> = ({
         </strong>
         <small>{date.toRelative({ style: 'short' })}</small>
       </Toast.Header>
-      <Toast.Body>{content}</Toast.Body>
+      <Toast.Body>{contentDom}</Toast.Body>
       <ProgressBar variant={'info'} now={eta} max={durationInSecond * STEPS_PER_SECOND} min={0} />
       <div>{buttonsDom}</div>
     </Toast>