test: strengthen internal types

jest/deps.d.ts

@@ -7,9 +7,18 @@
 
 // modules only used in tests
 
-declare module 'to-vfile';
+declare module 'to-vfile' {
+  import type {VFile} from 'vfile';
 
-declare module 'remark-mdx';
+  export function read(path: string, encoding?: string): Promise<VFile>;
+}
+
+declare module 'remark-mdx' {
+  import type {Plugin} from 'unified';
+
+  const mdx: Plugin;
+  export = mdx;
+}
 
 declare module '@testing-utils/git' {
   const createTempRepo: typeof import('./utils/git').createTempRepo;

packages/docusaurus-cssnano-preset/src/remove-overridden-custom-properties/__tests__/index.test.ts

@@ -10,8 +10,8 @@ import vfile from 'to-vfile';
 import postcss from 'postcss';
 import postCssRemoveOverriddenCustomProperties from '../index';
 
-const processFixture = (name: string) => {
-  const input = vfile.readSync(
+const processFixture = async (name: string) => {
+  const input = await vfile.read(
     path.join(__dirname, '__fixtures__', `${name}.css`),
     'utf8',
   );
@@ -23,11 +23,11 @@ const processFixture = (name: string) => {
 };
 
 describe('remove-overridden-custom-properties', () => {
-  it('overridden custom properties should be removed', () => {
-    expect(processFixture('normal')).toMatchSnapshot();
+  it('overridden custom properties should be removed', async () => {
+    await expect(processFixture('normal')).resolves.toMatchSnapshot();
   });
 
-  it('overridden custom properties with `!important` rule should not be removed', () => {
-    expect(processFixture('important_rule')).toMatchSnapshot();
+  it('overridden custom properties with `!important` rule should not be removed', async () => {
+    await expect(processFixture('important_rule')).resolves.toMatchSnapshot();
   });
 });

packages/docusaurus-migrate/src/index.ts

@@ -552,7 +552,7 @@ async function migrateVersionedSidebar(
         (topLevel: SidebarEntries, value) => {
           const key = value[0].replace(versionRegex, '');
           topLevel[key] = Object.entries(value[1]).reduce<{
-            [key: string]: Array<string | {[key: string]: unknown}>;
+            [key: string]: (string | {[key: string]: unknown})[];
           }>((acc, val) => {
             acc[val[0].replace(versionRegex, '')] = (
               val[1] as SidebarEntry[]

packages/docusaurus-migrate/src/types.ts

@@ -34,7 +34,7 @@ export type SidebarEntry =
 export type SidebarEntries = {
   [key: string]:
     | {[key: string]: unknown}
-    | Array<{[key: string]: unknown} | string>;
+    | ({[key: string]: unknown} | string)[];
 };
 
 export type VersionTwoConfig = {
@@ -49,7 +49,7 @@ export type VersionTwoConfig = {
   githubHost?: string;
   onBrokenLinks: string;
   onBrokenMarkdownLinks: string;
-  plugins: Array<[string, {[key: string]: unknown}]>;
+  plugins: [string, {[key: string]: unknown}][];
   themes?: [];
   presets: [[string, ClassicPresetEntries]];
   themeConfig: {
@@ -58,17 +58,14 @@ export type VersionTwoConfig = {
       logo?: {
         src?: string;
       };
-      items: Array<{[key: string]: unknown} | null>;
+      items: ({[key: string]: unknown} | null)[];
     };
     image?: string;
     footer: {
-      links: Array<{
+      links: {
         title: string;
-        items: Array<{
-          label: string;
-          to: string;
-        }>;
-      }>;
+        items: {label: string; to: string}[];
+      }[];
       copyright?: string;
       logo: {
         src?: string;
@@ -104,26 +101,26 @@ export type VersionOneConfig = {
   organizationName?: string;
   projectName?: string;
   noIndex?: boolean;
-  headerLinks?: Array<{doc: string; href: string; label: string; page: string}>;
+  headerLinks?: {doc: string; href: string; label: string; page: string}[];
   headerIcon?: string;
   favicon?: string;
   colors?: {primaryColor: string};
   copyright?: string;
   editUrl?: string;
   customDocsPath?: string;
-  users?: Array<{[key: string]: unknown}>;
+  users?: {[key: string]: unknown}[];
   disableHeaderTitle?: string;
   disableTitleTagline?: string;
-  separateCss?: Array<{[key: string]: unknown}>;
+  separateCss?: {[key: string]: unknown}[];
   footerIcon?: string;
   translationRecruitingLink?: string;
   algolia?: {[key: string]: unknown};
   gaTrackingId?: string;
   gaGtag?: boolean;
   highlight?: {[key: string]: unknown};
-  markdownPlugins?: Array<() => void>;
-  scripts?: Array<{src: string; [key: string]: unknown} | string>;
-  stylesheets?: Array<{href: string; [key: string]: unknown} | string>;
+  markdownPlugins?: (() => void)[];
+  scripts?: ({src: string; [key: string]: unknown} | string)[];
+  stylesheets?: ({href: string; [key: string]: unknown} | string)[];
   facebookAppId?: string;
   facebookComments?: true;
   facebookPixelId?: string;

packages/docusaurus-plugin-content-docs/src/__tests__/index.test.ts

@@ -31,6 +31,7 @@ import type {
   Options,
   PluginOptions,
   PropSidebarItemLink,
+  PropSidebars,
 } from '@docusaurus/plugin-content-docs';
 import type {
   SidebarItemsGeneratorOption,
@@ -82,7 +83,7 @@ const createFakeActions = (contentDir: string) => {
 
   // Query by prefix, because files have a hash at the end so it's not
   // convenient to query by full filename
-  const getCreatedDataByPrefix = (prefix: string) => {
+  function getCreatedDataByPrefix(prefix: string) {
     const entry = Object.entries(dataContainer).find(([key]) =>
       key.startsWith(prefix),
     );
@@ -92,8 +93,8 @@ Entries created:
 - ${Object.keys(dataContainer).join('\n- ')}
         `);
     }
-    return JSON.parse(entry[1] as string);
-  };
+    return JSON.parse(entry[1] as string) as PropSidebars;
+  }
 
   // Extra fns useful for tests!
   const utils = {
@@ -571,8 +572,8 @@ describe('versioned website (community)', () => {
       allContent: {},
     });
 
-    utils.checkVersionMetadataPropCreated(currentVersion!);
-    utils.checkVersionMetadataPropCreated(version100!);
+    utils.checkVersionMetadataPropCreated(currentVersion);
+    utils.checkVersionMetadataPropCreated(version100);
 
     utils.expectSnapshot();
   });

packages/docusaurus-theme-common/src/utils/reactUtils.tsx

@@ -71,6 +71,6 @@ export class ReactContextError extends Error {
     this.message = `Hook ${
       this.stack?.split('\n')[1]?.match(/at (?:\w+\.)?(?<name>\w+)/)?.groups!
         .name ?? ''
-    } is called outside the <${providerName}>. ${additionalInfo || ''}`;
+    } is called outside the <${providerName}>. ${additionalInfo ?? ''}`;
   }
 }

packages/docusaurus-theme-search-algolia/src/theme/SearchBar/index.tsx

@@ -120,7 +120,9 @@ function DocSearch({
     }
 
     return Promise.all([
-      import('@docsearch/react/modal'),
+      import('@docsearch/react/modal') as Promise<
+        typeof import('@docsearch/react')
+      >,
       import('@docsearch/react/style'),
       import('./styles.css'),
     ]).then(([{DocSearchModal: Modal}]) => {

packages/docusaurus-utils-validation/src/__tests__/validationUtils.test.ts

@@ -42,7 +42,7 @@ describe('normalizePluginOptions', () => {
   it('throws for invalid options', () => {
     const options = {foo: 1};
     expect(() =>
-      normalizePluginOptions(Joi.object({foo: Joi.string()}), options),
+      normalizePluginOptions(Joi.object<object>({foo: Joi.string()}), options),
     ).toThrowErrorMatchingInlineSnapshot(`""foo" must be a string"`);
   });
 
@@ -90,7 +90,10 @@ describe('normalizeThemeConfig', () => {
   it('throws for invalid options', () => {
     const themeConfig = {foo: 1, bar: 1};
     expect(() =>
-      normalizeThemeConfig(Joi.object({foo: Joi.string()}), themeConfig),
+      normalizeThemeConfig(
+        Joi.object<object>({foo: Joi.string()}),
+        themeConfig,
+      ),
     ).toThrowErrorMatchingInlineSnapshot(`""foo" must be a string"`);
   });
 

packages/docusaurus/src/client/PendingNavigation.tsx

@@ -35,7 +35,7 @@ class PendingNavigation extends React.Component<Props, State> {
       ? dispatchLifecycleAction('onRouteUpdate', {
           previousLocation: null,
           location: this.props.location,
-        })!
+        })
       : () => {};
     this.state = {
       nextRouteHasLoaded: true,
@@ -60,14 +60,14 @@ class PendingNavigation extends React.Component<Props, State> {
     this.routeUpdateCleanupCb = dispatchLifecycleAction('onRouteUpdate', {
       previousLocation: this.previousLocation,
       location: nextLocation,
-    })!;
+    });
 
     // Load data while the old screen remains. Force preload instead of using
     // `window.docusaurus`, because we want to avoid loading screen even when
     // user is on saveData
     preload(nextLocation.pathname)
       .then(() => {
-        this.routeUpdateCleanupCb?.();
+        this.routeUpdateCleanupCb();
         this.setState({nextRouteHasLoaded: true});
       })
       .catch((e: unknown) => console.warn(e));

packages/docusaurus/src/commands/deploy.ts

@@ -69,7 +69,7 @@ This behavior can have SEO impacts and create relative link issues.
 
   // The source branch; defaults to the currently checked out branch
   const sourceBranch =
-    process.env.CURRENT_BRANCH ||
+    process.env.CURRENT_BRANCH ??
     shell.exec('git rev-parse --abbrev-ref HEAD', {silent: true}).stdout.trim();
 
   const gitUser = process.env.GIT_USER;
@@ -90,8 +90,8 @@ This behavior can have SEO impacts and create relative link issues.
   }
 
   const organizationName =
-    process.env.ORGANIZATION_NAME ||
-    process.env.CIRCLE_PROJECT_USERNAME ||
+    process.env.ORGANIZATION_NAME ??
+    process.env.CIRCLE_PROJECT_USERNAME ??
     siteConfig.organizationName;
   if (!organizationName) {
     throw new Error(
@@ -101,8 +101,8 @@ This behavior can have SEO impacts and create relative link issues.
   logger.info`organizationName: name=${organizationName}`;
 
   const projectName =
-    process.env.PROJECT_NAME ||
-    process.env.CIRCLE_PROJECT_REPONAME ||
+    process.env.PROJECT_NAME ??
+    process.env.CIRCLE_PROJECT_REPONAME ??
     siteConfig.projectName;
   if (!projectName) {
     throw new Error(
@@ -113,7 +113,7 @@ This behavior can have SEO impacts and create relative link issues.
 
   // We never deploy on pull request.
   const isPullRequest =
-    process.env.CI_PULL_REQUEST || process.env.CIRCLE_PULL_REQUEST;
+    process.env.CI_PULL_REQUEST ?? process.env.CIRCLE_PULL_REQUEST;
   if (isPullRequest) {
     shell.echo('Skipping deploy on a pull request.');
     shell.exit(0);
@@ -136,12 +136,12 @@ You can also set the deploymentBranch property in docusaurus.config.js .`);
   }
 
   const deploymentBranch =
-    process.env.DEPLOYMENT_BRANCH || siteConfig.deploymentBranch || 'gh-pages';
+    process.env.DEPLOYMENT_BRANCH ?? siteConfig.deploymentBranch ?? 'gh-pages';
   logger.info`deploymentBranch: name=${deploymentBranch}`;
 
   const githubHost =
-    process.env.GITHUB_HOST || siteConfig.githubHost || 'github.com';
-  const githubPort = process.env.GITHUB_PORT || siteConfig.githubPort;
+    process.env.GITHUB_HOST ?? siteConfig.githubHost ?? 'github.com';
+  const githubPort = process.env.GITHUB_PORT ?? siteConfig.githubPort;
 
   let deploymentRepoURL: string;
   if (useSSH) {
@@ -214,7 +214,7 @@ You can also set the deploymentBranch property in docusaurus.config.js .`);
     shellExecLog('git add --all');
 
     const commitMessage =
-      process.env.CUSTOM_COMMIT_MESSAGE ||
+      process.env.CUSTOM_COMMIT_MESSAGE ??
       `Deploy website - based on ${currentCommit}`;
     const commitResults = shellExecLog(`git commit -m "${commitMessage}"`);
     if (

packages/docusaurus/src/commands/swizzle/__tests__/index.test.ts

@@ -65,7 +65,7 @@ function createExitMock() {
   });
   // eslint-disable-next-line jest/require-top-level-describe
   afterEach(async () => {
-    mock?.mockRestore();
+    mock.mockRestore();
   });
 
   return {

packages/docusaurus/src/server/plugins/__tests__/index.test.ts

@@ -28,7 +28,7 @@ describe('loadPlugins', () => {
                 name: 'test1',
                 prop: 'a',
                 async loadContent() {
-                  // Testing that plugin lifecycle is bound to the plugin instance
+                  // Testing that plugin lifecycle is bound to the instance
                   return this.prop;
                 },
                 async contentLoaded({content, actions}) {

website/docs/api/plugins/plugin-content-docs.md

@@ -96,14 +96,14 @@ type SidebarGenerator = (generatorArgs: {
   /** Useful metadata for the version this sidebar belongs to. */
   version: {contentPath: string; versionName: string};
   /** All the docs of that version (unfiltered). */
-  docs: Array<{
+  docs: {
     id: string;
     title: string;
     frontMatter: DocFrontMatter & Record<string, unknown>;
     source: string;
     sourceDirName: string;
     sidebarPosition?: number | undefined;
-  }>;
+  }[];
   /** Number prefix parser configured for this plugin. */
   numberPrefixParser: PrefixParser;
   /** The default category index matcher which you can override. */

website/docs/api/plugins/plugin-pwa.md

@@ -112,8 +112,8 @@ Turn debug mode on:
 
 ### `offlineModeActivationStrategies` {#offlinemodeactivationstrategies}
 
-- Type: `Array<'appInstalled' | 'mobile' | 'saveData'| 'queryString' | 'always'>`
-- Default: `['appInstalled','queryString','standalone']`
+- Type: `('appInstalled' | 'mobile' | 'saveData'| 'queryString' | 'always')[]`
+- Default: `['appInstalled', 'queryString', 'standalone']`
 
 Strategies used to turn the offline mode on:
 
@@ -194,7 +194,7 @@ The default theme includes an implementation for the reload popup and uses [Infi
 
 ### `pwaHead` {#pwahead}
 
-- Type: `Array<{ tagName: string } & Record<string,string>>`
+- Type: `({ tagName: string; [attributeName: string]: string })[]`
 - Default: `[]`
 
 Array of objects containing `tagName` and key-value pairs for attributes to inject into the `<head>` tag. Technically you can inject any head tag through this, but it's ideally used for tags to make your site PWA compliant. Here's a list of tag to make your app fully compliant:

website/docs/guides/markdown-features/markdown-features-toc.mdx

@@ -83,11 +83,11 @@ import TOCInline from '@theme/TOCInline';
 The `toc` global is just a list of heading items:
 
 ```ts
-declare const toc: Array<{
+declare const toc: {
   value: string;
   id: string;
   level: number;
-}>;
+}[];
 ```
 
 Note that the `toc` global is a flat array, so you can easily cut out unwanted nodes or insert extra nodes, and create a new TOC tree.