From b223cdd2553342a08297840f52722d1afd974dd3 Mon Sep 17 00:00:00 2001
From: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Date: Wed, 16 Feb 2022 22:48:22 +0100
Subject: [PATCH] refactor: display solutions (#45139)

* refactor: re-organise show-project-links

* refactor: update ChallengeFile's declared shape

* fix: handle missing challenge solution

* refactor: use display function for Certification

* refactor: use display function for TimeLine

* refactor: use common component for timeline + cert

* fix: handle legacy solutions

* refactor: use widget for certifications

* refactor: reorganise ShowDisplayWidget

* refactor: remove unused ids

* test: pass dataCy, not projectTitle, to widget

* chore: kebabify

* revert: add id back for dropdown

Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>

* revert: add the ids back

Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>
---
 client/i18n/locales/english/translations.json |   1 +
 .../client-only-routes/show-project-links.tsx |  51 ++-----
 .../src/client-only-routes/show-settings.tsx  |   2 +-
 .../profile/components/time-line.test.tsx     |   2 +-
 .../{TimeLine.tsx => time-line.tsx}           |  86 ++---------
 client/src/components/profile/profile.tsx     |   2 +-
 .../{Certification.js => certification.js}    |  90 ++---------
 ...fication.test.js => certification.test.js} |   2 +-
 .../solution-display-widget/index.tsx         | 141 ++++++++++++++++++
 client/src/redux/prop-types.ts                |   2 +-
 .../utils/__fixtures/completed-challenges.ts  |  39 +++++
 .../src/utils/solution-display-type.test.ts   |  29 ++++
 client/src/utils/solution-display-type.ts     |  16 ++
 curriculum/schema/challengeSchema.js          |   2 +-
 .../{challenges.js => challenges.ts}          |  30 ++--
 15 files changed, 285 insertions(+), 210 deletions(-)
 rename client/src/components/profile/components/{TimeLine.tsx => time-line.tsx} (79%)
 rename client/src/components/settings/{Certification.js => certification.js} (84%)
 rename client/src/components/settings/{Certification.test.js => certification.test.js} (99%)
 create mode 100644 client/src/components/solution-display-widget/index.tsx
 create mode 100644 client/src/utils/__fixtures/completed-challenges.ts
 create mode 100644 client/src/utils/solution-display-type.test.ts
 create mode 100644 client/src/utils/solution-display-type.ts
 rename utils/__fixtures__/{challenges.js => challenges.ts} (59%)

diff --git a/client/i18n/locales/english/translations.json b/client/i18n/locales/english/translations.json
index f71db454a7..f1a02b875b 100644
--- a/client/i18n/locales/english/translations.json
+++ b/client/i18n/locales/english/translations.json
@@ -551,6 +551,7 @@
       "heading-legacy-full-stack": "As part of this Legacy Full Stack certification, {{user}} completed the following certifications:",
       "heading": "As part of this certification, {{user}} built the following projects and got all automated test suites to pass:",
       "solution": "solution",
+      "no-solution": "error displaying solution, email support@freeCodeCamp.org to get help.",
       "source": "source",
       "footnote": "If you suspect that any of these projects violate the <2>academic honesty policy</2>, please <5>report this to our team</5>.",
       "title": {
diff --git a/client/src/client-only-routes/show-project-links.tsx b/client/src/client-only-routes/show-project-links.tsx
index 39e775e36a..3ca5a39dcb 100644
--- a/client/src/client-only-routes/show-project-links.tsx
+++ b/client/src/client-only-routes/show-project-links.tsx
@@ -10,7 +10,7 @@ import {
   legacyProjectMap
 } from '../resources/cert-and-project-map';
 
-import { maybeUrlRE } from '../utils';
+import { SolutionDisplayWidget } from '../components/solution-display-widget';
 
 interface ShowProjectLinksProps {
   certName: string;
@@ -52,8 +52,8 @@ const ShowProjectLinks = (props: ShowProjectLinksProps): JSX.Element => {
       return null;
     }
 
-    const { solution, githubLink, challengeFiles } = completedProject;
-    const onClickHandler = () =>
+    const { solution, challengeFiles } = completedProject;
+    const showFilesSolution = () =>
       setSolutionState({
         projectTitle,
         challengeFiles,
@@ -61,46 +61,13 @@ const ShowProjectLinks = (props: ShowProjectLinksProps): JSX.Element => {
         isOpen: true
       });
 
-    if (challengeFiles?.length) {
-      return (
-        <button
-          className='project-link-button-override'
-          data-cy={`${projectTitle} solution`}
-          onClick={onClickHandler}
-        >
-          {t('certification.project.solution')}
-        </button>
-      );
-    }
-    if (githubLink) {
-      return (
-        <>
-          <a href={solution ?? ''} rel='noopener noreferrer' target='_blank'>
-            {t('certification.project.solution')}
-          </a>
-          ,{' '}
-          <a href={githubLink} rel='noopener noreferrer' target='_blank'>
-            {t('certification.project.source')}
-          </a>
-        </>
-      );
-    }
-    if (maybeUrlRE.test(solution ?? '')) {
-      return (
-        <a
-          className='btn-invert'
-          href={solution ?? ''}
-          rel='noopener noreferrer'
-          target='_blank'
-        >
-          {t('certification.project.solution')}
-        </a>
-      );
-    }
     return (
-      <button className='project-link-button-override' onClick={onClickHandler}>
-        {t('certification.project.solution')}
-      </button>
+      <SolutionDisplayWidget
+        completedChallenge={completedProject}
+        dataCy={`${projectTitle} solution`}
+        displayContext='certification'
+        showFilesSolution={showFilesSolution}
+      ></SolutionDisplayWidget>
     );
   };
 
diff --git a/client/src/client-only-routes/show-settings.tsx b/client/src/client-only-routes/show-settings.tsx
index b58f60452b..ced9d1fea1 100644
--- a/client/src/client-only-routes/show-settings.tsx
+++ b/client/src/client-only-routes/show-settings.tsx
@@ -8,7 +8,7 @@ import { createSelector } from 'reselect';
 import envData from '../../../config/env.json';
 import { createFlashMessage } from '../components/Flash/redux';
 import { Loader, Spacer } from '../components/helpers';
-import Certification from '../components/settings/Certification';
+import Certification from '../components/settings/certification';
 import About from '../components/settings/about';
 import DangerZone from '../components/settings/danger-zone';
 import Email from '../components/settings/email';
diff --git a/client/src/components/profile/components/time-line.test.tsx b/client/src/components/profile/components/time-line.test.tsx
index b5044188eb..d08b0654d3 100644
--- a/client/src/components/profile/components/time-line.test.tsx
+++ b/client/src/components/profile/components/time-line.test.tsx
@@ -3,7 +3,7 @@
 import { render, screen } from '@testing-library/react';
 import { useStaticQuery } from 'gatsby';
 import React from 'react';
-import TimeLine from './TimeLine';
+import TimeLine from './time-line';
 
 beforeEach(() => {
   // @ts-ignore
diff --git a/client/src/components/profile/components/TimeLine.tsx b/client/src/components/profile/components/time-line.tsx
similarity index 79%
rename from client/src/components/profile/components/TimeLine.tsx
rename to client/src/components/profile/components/time-line.tsx
index 0558289d16..df3ee76518 100644
--- a/client/src/components/profile/components/TimeLine.tsx
+++ b/client/src/components/profile/components/time-line.tsx
@@ -1,11 +1,5 @@
 /* eslint-disable @typescript-eslint/unbound-method */
-import {
-  Button,
-  Modal,
-  Table,
-  DropdownButton,
-  MenuItem
-} from '@freecodecamp/react-bootstrap';
+import { Button, Modal, Table } from '@freecodecamp/react-bootstrap';
 import Loadable from '@loadable/component';
 import { useStaticQuery, graphql } from 'gatsby';
 import { reverse, sortBy } from 'lodash-es';
@@ -21,8 +15,8 @@ import {
 } from '../../../../../utils';
 import CertificationIcon from '../../../assets/icons/certification-icon';
 import { ChallengeFiles, CompletedChallenge } from '../../../redux/prop-types';
-import { maybeUrlRE } from '../../../utils';
 import { FullWidthRow, Link } from '../../helpers';
+import { SolutionDisplayWidget } from '../../solution-display-widget';
 import TimelinePagination from './timeline-pagination';
 
 import './timeline.css';
@@ -53,7 +47,6 @@ function TimelineInner({
   idToNameMap,
   sortedTimeline,
   totalPages,
-
   completedMap,
   t,
   username
@@ -96,73 +89,20 @@ function TimelineInner({
   }
 
   function renderViewButton(
-    id: string,
-    challengeFiles: ChallengeFiles,
-    githubLink?: string,
-    solution?: string | null
+    completedChallenge: CompletedChallenge
   ): React.ReactNode {
-    if (challengeFiles?.length) {
-      return (
-        <Button
-          block={true}
-          bsStyle='primary'
-          className='btn-invert'
-          id={`btn-for-${id}`}
-          onClick={() => viewSolution(id, solution, challengeFiles)}
-        >
-          {t('buttons.show-code')}
-        </Button>
-      );
-    } else if (githubLink) {
-      return (
-        <div className='solutions-dropdown'>
-          <DropdownButton
-            block={true}
-            bsStyle='primary'
-            className='btn-invert'
-            id={`dropdown-for-${id}`}
-            title='View'
-          >
-            <MenuItem
-              bsStyle='primary'
-              href={solution}
-              rel='noopener noreferrer'
-              target='_blank'
-            >
-              {t('buttons.frontend')}
-            </MenuItem>
-            <MenuItem
-              bsStyle='primary'
-              href={githubLink}
-              rel='noopener noreferrer'
-              target='_blank'
-            >
-              {t('buttons.backend')}
-            </MenuItem>
-          </DropdownButton>
-        </div>
-      );
-    } else if (solution && maybeUrlRE.test(solution)) {
-      return (
-        <Button
-          block={true}
-          bsStyle='primary'
-          className='btn-invert'
-          href={solution}
-          id={`btn-for-${id}`}
-          rel='noopener noreferrer'
-          target='_blank'
-        >
-          {t('buttons.view')}
-        </Button>
-      );
-    } else {
-      return null;
-    }
+    const { id, solution, challengeFiles } = completedChallenge;
+    return (
+      <SolutionDisplayWidget
+        completedChallenge={completedChallenge}
+        showFilesSolution={() => viewSolution(id, solution, challengeFiles)}
+        displayContext={'timeline'}
+      ></SolutionDisplayWidget>
+    );
   }
 
   function renderCompletion(completed: CompletedChallenge): JSX.Element {
-    const { id, challengeFiles, githubLink, solution } = completed;
+    const { id } = completed;
     const completedDate = new Date(completed.completedDate);
     // @ts-expect-error idToNameMap is not a <string, string> Map...
     const { challengeTitle, challengePath, certPath } = idToNameMap.get(id);
@@ -181,7 +121,7 @@ function TimelineInner({
             <Link to={challengePath as string}>{challengeTitle}</Link>
           )}
         </td>
-        <td>{renderViewButton(id, challengeFiles, githubLink, solution)}</td>
+        <td>{renderViewButton(completed)}</td>
         <td className='text-center'>
           <time dateTime={completedDate.toISOString()}>
             {completedDate.toLocaleString([localeCode, 'en-US'], {
diff --git a/client/src/components/profile/profile.tsx b/client/src/components/profile/profile.tsx
index e042111618..6f49599034 100644
--- a/client/src/components/profile/profile.tsx
+++ b/client/src/components/profile/profile.tsx
@@ -5,7 +5,7 @@ import { TFunction, useTranslation } from 'react-i18next';
 
 import { FullWidthRow, Link, Spacer } from '../helpers';
 import { User } from './../../redux/prop-types';
-import Timeline from './components/TimeLine';
+import Timeline from './components/time-line';
 import Camper from './components/camper';
 import Certifications from './components/certifications';
 import HeatMap from './components/heat-map';
diff --git a/client/src/components/settings/Certification.js b/client/src/components/settings/certification.js
similarity index 84%
rename from client/src/components/settings/Certification.js
rename to client/src/components/settings/certification.js
index 91327f2e23..08ee698269 100644
--- a/client/src/components/settings/Certification.js
+++ b/client/src/components/settings/certification.js
@@ -1,9 +1,4 @@
-import {
-  Table,
-  Button,
-  DropdownButton,
-  MenuItem
-} from '@freecodecamp/react-bootstrap';
+import { Table, Button } from '@freecodecamp/react-bootstrap';
 import { Link, navigate } from 'gatsby';
 import { find, first } from 'lodash-es';
 import PropTypes from 'prop-types';
@@ -16,12 +11,10 @@ import {
   projectMap,
   legacyProjectMap
 } from '../../resources/cert-and-project-map';
-
-import { maybeUrlRE } from '../../utils';
 import { FlashMessages } from '../Flash/redux/flash-messages';
 import ProjectModal from '../SolutionViewer/ProjectModal';
 import { FullWidthRow, Spacer } from '../helpers';
-
+import { SolutionDisplayWidget } from '../solution-display-widget';
 import SectionHeader from './section-header';
 
 import './certification.css';
@@ -163,7 +156,7 @@ export class CertificationSettings extends Component {
   getUserIsCertMap = () => isCertMapSelector(this.props);
 
   getProjectSolution = (projectId, projectTitle) => {
-    const { completedChallenges, t } = this.props;
+    const { completedChallenges } = this.props;
     const completedProject = find(
       completedChallenges,
       ({ id }) => projectId === id
@@ -171,7 +164,7 @@ export class CertificationSettings extends Component {
     if (!completedProject) {
       return null;
     }
-    const { solution, githubLink, challengeFiles } = completedProject;
+    const { solution, challengeFiles } = completedProject;
     const onClickHandler = () =>
       this.setState({
         solutionViewer: {
@@ -181,75 +174,14 @@ export class CertificationSettings extends Component {
           isOpen: true
         }
       });
-    if (challengeFiles?.length) {
-      return (
-        <Button
-          block={true}
-          bsStyle='primary'
-          className='btn-invert'
-          data-cy={projectTitle}
-          id={`btn-for-${projectId}`}
-          onClick={onClickHandler}
-        >
-          {t('buttons.show-code')}
-        </Button>
-      );
-    }
-    if (githubLink) {
-      return (
-        <div className='solutions-dropdown'>
-          <DropdownButton
-            block={true}
-            bsStyle='primary'
-            className='btn-invert'
-            id={`dropdown-for-${projectId}`}
-            title='Show Solutions'
-          >
-            <MenuItem
-              bsStyle='primary'
-              href={solution}
-              rel='noopener noreferrer'
-              target='_blank'
-            >
-              {t('buttons.frontend')}
-            </MenuItem>
-            <MenuItem
-              bsStyle='primary'
-              href={githubLink}
-              rel='noopener noreferrer'
-              target='_blank'
-            >
-              {t('buttons.backend')}
-            </MenuItem>
-          </DropdownButton>
-        </div>
-      );
-    }
-    if (maybeUrlRE.test(solution)) {
-      return (
-        <Button
-          block={true}
-          bsStyle='primary'
-          className='btn-invert'
-          href={solution}
-          id={`btn-for-${projectId}`}
-          rel='noopener noreferrer'
-          target='_blank'
-        >
-          {t('buttons.show-solution')}
-        </Button>
-      );
-    }
+
     return (
-      <Button
-        block={true}
-        bsStyle='primary'
-        className='btn-invert'
-        id={`btn-for-${projectId}`}
-        onClick={onClickHandler}
-      >
-        {t('buttons.show-code')}
-      </Button>
+      <SolutionDisplayWidget
+        completedChallenge={completedProject}
+        dataCy={projectTitle}
+        showFilesSolution={onClickHandler}
+        displayContext={'settings'}
+      ></SolutionDisplayWidget>
     );
   };
 
diff --git a/client/src/components/settings/Certification.test.js b/client/src/components/settings/certification.test.js
similarity index 99%
rename from client/src/components/settings/Certification.test.js
rename to client/src/components/settings/certification.test.js
index 9dfd53dfca..a85b65d573 100644
--- a/client/src/components/settings/Certification.test.js
+++ b/client/src/components/settings/certification.test.js
@@ -3,7 +3,7 @@ import React from 'react';
 import { Provider } from 'react-redux';
 import { createStore } from '../../redux/createStore';
 
-import { CertificationSettings } from './Certification';
+import { CertificationSettings } from './certification';
 
 jest.mock('../../analytics');
 
diff --git a/client/src/components/solution-display-widget/index.tsx b/client/src/components/solution-display-widget/index.tsx
new file mode 100644
index 0000000000..21745b9a87
--- /dev/null
+++ b/client/src/components/solution-display-widget/index.tsx
@@ -0,0 +1,141 @@
+import {
+  Button,
+  DropdownButton,
+  MenuItem
+} from '@freecodecamp/react-bootstrap';
+import React from 'react';
+import { useTranslation } from 'react-i18next';
+import { CompletedChallenge } from '../../redux/prop-types';
+import { getSolutionDisplayType } from '../../utils/solution-display-type';
+
+interface Props {
+  completedChallenge: CompletedChallenge;
+  dataCy?: string;
+  showFilesSolution: () => void;
+  displayContext: 'timeline' | 'settings' | 'certification';
+}
+
+export function SolutionDisplayWidget({
+  completedChallenge,
+  dataCy,
+  showFilesSolution,
+  displayContext
+}: Props) {
+  const { id, solution, githubLink } = completedChallenge;
+  const { t } = useTranslation();
+
+  const dropdownTitle =
+    displayContext === 'settings' ? 'Show Solutions' : 'View';
+  const projectLinkText =
+    displayContext === 'settings'
+      ? t('buttons.show-solution')
+      : t('buttons.view');
+
+  const ShowFilesSolutionForCertification = (
+    <button
+      className='project-link-button-override'
+      data-cy={dataCy}
+      onClick={showFilesSolution}
+    >
+      {t('certification.project.solution')}
+    </button>
+  );
+  const ShowProjectAndGithubLinkForCertification = (
+    <>
+      <a href={solution ?? ''} rel='noopener noreferrer' target='_blank'>
+        {t('certification.project.solution')}
+      </a>
+      ,{' '}
+      <a href={githubLink} rel='noopener noreferrer' target='_blank'>
+        {t('certification.project.source')}
+      </a>
+    </>
+  );
+  const ShowProjectLinkForCertification = (
+    <a
+      className='btn-invert'
+      href={solution ?? ''}
+      rel='noopener noreferrer'
+      target='_blank'
+    >
+      {t('certification.project.solution')}
+    </a>
+  );
+  const MissingSolutionComponentForCertification = (
+    <>{t('certification.project.no-solution')}</>
+  );
+  const ShowFilesSolution = (
+    <Button
+      block={true}
+      bsStyle='primary'
+      className='btn-invert'
+      data-cy={dataCy}
+      id={`btn-for-${id}`}
+      onClick={showFilesSolution}
+    >
+      {t('buttons.show-code')}
+    </Button>
+  );
+  const ShowProjectAndGithubLinks = (
+    <div className='solutions-dropdown'>
+      <DropdownButton
+        block={true}
+        bsStyle='primary'
+        className='btn-invert'
+        id={`dropdown-for-${id}`}
+        title={dropdownTitle}
+      >
+        <MenuItem
+          bsStyle='primary'
+          href={solution}
+          rel='noopener noreferrer'
+          target='_blank'
+        >
+          {t('buttons.frontend')}
+        </MenuItem>
+        <MenuItem
+          bsStyle='primary'
+          href={githubLink}
+          rel='noopener noreferrer'
+          target='_blank'
+        >
+          {t('buttons.backend')}
+        </MenuItem>
+      </DropdownButton>
+    </div>
+  );
+  const ShowProjectLink = (
+    <Button
+      block={true}
+      bsStyle='primary'
+      className='btn-invert'
+      href={solution}
+      id={`btn-for-${id}`}
+      rel='noopener noreferrer'
+      target='_blank'
+    >
+      {projectLinkText}
+    </Button>
+  );
+  const MissingSolutionComponent =
+    displayContext === 'settings' ? (
+      <>{t('certification.project.no-solution')}</>
+    ) : null;
+
+  const displayComponents =
+    displayContext === 'certification'
+      ? {
+          showFilesSolution: ShowFilesSolutionForCertification,
+          showProjectAndGitHubLinks: ShowProjectAndGithubLinkForCertification,
+          showProjectLink: ShowProjectLinkForCertification,
+          none: MissingSolutionComponentForCertification
+        }
+      : {
+          showFilesSolution: ShowFilesSolution,
+          showProjectAndGitHubLinks: ShowProjectAndGithubLinks,
+          showProjectLink: ShowProjectLink,
+          none: MissingSolutionComponent
+        };
+
+  return displayComponents[getSolutionDisplayType(completedChallenge)];
+}
diff --git a/client/src/redux/prop-types.ts b/client/src/redux/prop-types.ts
index 2a0fbdccf0..a637269ebb 100644
--- a/client/src/redux/prop-types.ts
+++ b/client/src/redux/prop-types.ts
@@ -363,7 +363,7 @@ export type ChallengeFile = {
   seed: string;
   contents: string;
   id: string;
-  history: [[string], string];
+  history: string[];
 };
 
 export type ChallengeFiles = ChallengeFile[] | null;
diff --git a/client/src/utils/__fixtures/completed-challenges.ts b/client/src/utils/__fixtures/completed-challenges.ts
new file mode 100644
index 0000000000..07394bb495
--- /dev/null
+++ b/client/src/utils/__fixtures/completed-challenges.ts
@@ -0,0 +1,39 @@
+import {challengeFiles} from '../../../../utils/__fixtures__/challenges';
+
+const baseChallenge = {
+  id: '1',
+  completedDate: 1,
+  challengeFiles: []
+}
+
+export const onlySolution = {
+  ...baseChallenge,
+  solution: 'https://some-url.com'
+}
+
+export const legacySolution = {
+  ...baseChallenge,
+  solution: 'var x = 1;'
+}
+
+export const bothLinks = {
+  ...baseChallenge,
+  githubLink: 'https://some.thing',
+  solution: 'https://some-url.com'
+}
+
+export const withChallenges = {
+  ...bothLinks,
+  challengeFiles
+}
+
+export const onlyGithubLink = {
+  ...baseChallenge,
+  githubLink: 'https://some.thing'
+}
+
+export const invalidGithubLink = {
+  ...baseChallenge,
+  githubLink: 'something',
+  solution: 'https://some-url.com'
+}
diff --git a/client/src/utils/solution-display-type.test.ts b/client/src/utils/solution-display-type.test.ts
new file mode 100644
index 0000000000..3842637fb3
--- /dev/null
+++ b/client/src/utils/solution-display-type.test.ts
@@ -0,0 +1,29 @@
+import {
+  bothLinks,
+  legacySolution,
+  invalidGithubLink,
+  onlyGithubLink,
+  onlySolution,
+  withChallenges
+} from './__fixtures/completed-challenges';
+import { getSolutionDisplayType } from './solution-display-type';
+
+describe('getSolutionDisplayType', () => {
+  it('should handle missing solutions', () => {
+    expect(getSolutionDisplayType(onlyGithubLink)).toBe('none');
+  });
+  it('should handle legacy solutions', () => {
+    expect(getSolutionDisplayType(legacySolution)).toBe('showFilesSolution');
+  });
+  it('should handle solutions with files', () => {
+    expect(getSolutionDisplayType(withChallenges)).toBe('showFilesSolution');
+  });
+  it('should handle solutions with a single valid url', () => {
+    expect.assertions(2);
+    expect(getSolutionDisplayType(onlySolution)).toBe('showProjectLink');
+    expect(getSolutionDisplayType(invalidGithubLink)).toBe('showProjectLink');
+  });
+  it('should handle solutions with both links', () => {
+    expect(getSolutionDisplayType(bothLinks)).toBe('showProjectAndGitHubLinks');
+  });
+});
diff --git a/client/src/utils/solution-display-type.ts b/client/src/utils/solution-display-type.ts
new file mode 100644
index 0000000000..86712e67ef
--- /dev/null
+++ b/client/src/utils/solution-display-type.ts
@@ -0,0 +1,16 @@
+import type { CompletedChallenge } from '../redux/prop-types';
+import { maybeUrlRE } from '.';
+
+export const getSolutionDisplayType = ({
+  solution,
+  githubLink,
+  challengeFiles
+}: CompletedChallenge) => {
+  if (challengeFiles?.length) return 'showFilesSolution';
+  if (!solution) return 'none';
+  // Some of the user records still have JavaScript project solutions stored as
+  // solution strings
+  if (!maybeUrlRE.test(solution)) return 'showFilesSolution';
+  if (maybeUrlRE.test(githubLink ?? '')) return 'showProjectAndGitHubLinks';
+  return 'showProjectLink';
+};
diff --git a/curriculum/schema/challengeSchema.js b/curriculum/schema/challengeSchema.js
index 97c3240806..3f0fa59801 100644
--- a/curriculum/schema/challengeSchema.js
+++ b/curriculum/schema/challengeSchema.js
@@ -18,7 +18,7 @@ const fileJoi = Joi.object().keys({
   seed: Joi.string().allow(''),
   contents: Joi.string().allow(''),
   id: Joi.string().allow(''),
-  history: [Joi.array().items(Joi.string().allow('')), Joi.string().allow('')]
+  history: Joi.array().items(Joi.string().allow(''))
 });
 
 const schema = Joi.object()
diff --git a/utils/__fixtures__/challenges.js b/utils/__fixtures__/challenges.ts
similarity index 59%
rename from utils/__fixtures__/challenges.js
rename to utils/__fixtures__/challenges.ts
index 5d9c0e75b6..3805a5fce4 100644
--- a/utils/__fixtures__/challenges.js
+++ b/utils/__fixtures__/challenges.ts
@@ -1,5 +1,8 @@
-exports.challengeFiles = [
+import { ChallengeFile } from "../../client/src/redux/prop-types";
+
+export const challengeFiles: ChallengeFile[] = [
   {
+    id: '1',
     contents: 'some css',
     error: null,
     ext: 'css',
@@ -7,11 +10,13 @@ exports.challengeFiles = [
     history: ['styles.css'],
     fileKey: 'stylescss',
     name: 'styles',
-    path: 'styles.css',
     seed: 'some css',
-    tail: ''
+    tail: '',
+    editableRegionBoundaries: [],
+    usesMultifileEditor: true,
   },
   {
+    id: '2',
     contents: 'some html',
     error: null,
     ext: 'html',
@@ -19,11 +24,13 @@ exports.challengeFiles = [
     history: ['index.html'],
     fileKey: 'indexhtml',
     name: 'index',
-    path: 'index.html',
     seed: 'some html',
-    tail: ''
+    tail: '',
+    editableRegionBoundaries: [],
+    usesMultifileEditor: true,
   },
   {
+    id: '3',
     contents: 'some js',
     error: null,
     ext: 'js',
@@ -31,11 +38,13 @@ exports.challengeFiles = [
     history: ['script.js'],
     fileKey: 'scriptjs',
     name: 'script',
-    path: 'script.js',
     seed: 'some js',
-    tail: ''
+    tail: '',
+    editableRegionBoundaries: [],
+    usesMultifileEditor: true,
   },
   {
+    id: '4',
     contents: 'some jsx',
     error: null,
     ext: 'jsx',
@@ -43,8 +52,9 @@ exports.challengeFiles = [
     history: ['index.jsx'],
     fileKey: 'indexjsx',
     name: 'index',
-    path: 'index.jsx',
     seed: 'some jsx',
-    tail: ''
+    tail: '',
+    editableRegionBoundaries: [],
+    usesMultifileEditor: true,
   }
-];
+]