Fix Typescript errors

x-pack/plugins/enterprise_search/public/applications/__mocks__/mount_with_context.mock.tsx

@@ -22,7 +22,7 @@ import { mockLicenseContext } from './license_context.mock';
  *
  * const wrapper = mountWithContext(<Component />, { enterpriseSearchUrl: 'someOverride', license: {} });
  */
-export const mountWithContext = (children, context) => {
+export const mountWithContext = (children: React.ReactNode, context?: object) => {
   return mount(
     <I18nProvider>
       <KibanaContext.Provider value={{ ...mockKibanaContext, ...context }}>
@@ -40,7 +40,7 @@ export const mountWithContext = (children, context) => {
  *
  * Same usage/override functionality as mountWithContext
  */
-export const mountWithKibanaContext = (children, context) => {
+export const mountWithKibanaContext = (children: React.ReactNode, context?: object) => {
   return mount(
     <KibanaContext.Provider value={{ ...mockKibanaContext, ...context }}>
       {children}

x-pack/plugins/enterprise_search/public/applications/__mocks__/shallow_with_i18n.mock.tsx

@@ -20,12 +20,11 @@ const { intl } = intlProvider.getChildContext();
  *
  * const wrapper = shallowWithIntl(<Component />);
  */
-export const shallowWithIntl = (children) => {
-  return shallow(<I18nProvider>{children}</I18nProvider>, {
-    context: { intl },
-    childContextTypes: { intl },
-  })
+export const shallowWithIntl = (children: React.ReactNode) => {
+  const context = { context: { intl } };
+
+  return shallow(<I18nProvider>{children}</I18nProvider>, context)
     .childAt(0)
-    .dive()
+    .dive(context)
     .shallow();
 };

x-pack/plugins/enterprise_search/public/applications/app_search/components/empty_states/empty_state.tsx

@@ -16,7 +16,7 @@ import { EngineOverviewHeader } from '../engine_overview_header';
 
 import './empty_states.scss';
 
-export const EmptyState: React.FC<> = () => {
+export const EmptyState: React.FC = () => {
   const { enterpriseSearchUrl, http } = useContext(KibanaContext) as IKibanaContext;
 
   const buttonProps = {

x-pack/plugins/enterprise_search/public/applications/app_search/components/empty_states/empty_states.test.tsx

@@ -39,7 +39,8 @@ describe('NoUserState', () => {
   });
 
   it('renders with username', () => {
-    getUserName.mockImplementationOnce(() => 'dolores-abernathy');
+    (getUserName as jest.Mock).mockImplementationOnce(() => 'dolores-abernathy');
+
     const wrapper = shallowWithIntl(<NoUserState />);
     const prompt = wrapper.find(EuiEmptyPrompt).dive();
     const description1 = prompt.find(FormattedMessage).at(1).dive();
@@ -62,7 +63,7 @@ describe('EmptyState', () => {
 
     button.simulate('click');
     expect(sendTelemetry).toHaveBeenCalled();
-    sendTelemetry.mockClear();
+    (sendTelemetry as jest.Mock).mockClear();
   });
 });
 

x-pack/plugins/enterprise_search/public/applications/app_search/components/empty_states/error_state.tsx

@@ -16,7 +16,7 @@ import { EngineOverviewHeader } from '../engine_overview_header';
 
 import './empty_states.scss';
 
-export const ErrorState: ReactFC<> = () => {
+export const ErrorState: React.FC = () => {
   const { enterpriseSearchUrl } = useContext(KibanaContext) as IKibanaContext;
 
   return (

x-pack/plugins/enterprise_search/public/applications/app_search/components/empty_states/loading_state.tsx

@@ -12,7 +12,7 @@ import { EngineOverviewHeader } from '../engine_overview_header';
 
 import './empty_states.scss';
 
-export const LoadingState: React.FC<> = () => {
+export const LoadingState: React.FC = () => {
   return (
     <EuiPage restrictWidth className="engine-overview empty-state">
       <SetBreadcrumbs isRoot />

x-pack/plugins/enterprise_search/public/applications/app_search/components/empty_states/no_user_state.tsx

@@ -15,7 +15,7 @@ import { getUserName } from '../../utils/get_username';
 
 import './empty_states.scss';
 
-export const NoUserState: React.FC<> = () => {
+export const NoUserState: React.FC = () => {
   const username = getUserName();
 
   return (

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/engine_overview.test.tsx

@@ -8,15 +8,15 @@ import '../../../__mocks__/react_router_history.mock';
 
 import React from 'react';
 import { act } from 'react-dom/test-utils';
-import { render } from 'enzyme';
+import { render, ReactWrapper } from 'enzyme';
 
 import { I18nProvider } from '@kbn/i18n/react';
 import { KibanaContext } from '../../../';
 import { LicenseContext } from '../../../shared/licensing';
 import { mountWithContext, mockKibanaContext } from '../../../__mocks__';
 
 import { EmptyState, ErrorState, NoUserState } from '../empty_states';
-import { EngineTable } from './engine_table';
+import { EngineTable, IEngineTablePagination } from './engine_table';
 
 import { EngineOverview } from './';
 
@@ -25,7 +25,7 @@ describe('EngineOverview', () => {
     it('isLoading', () => {
       // We use render() instead of mount() here to not trigger lifecycle methods (i.e., useEffect)
       // TODO: Consider pulling this out to a renderWithContext mock/helper
-      const wrapper = render(
+      const wrapper: Cheerio = render(
         <I18nProvider>
           <KibanaContext.Provider value={{ http: {} }}>
             <LicenseContext.Provider value={{ license: {} }}>
@@ -85,7 +85,7 @@ describe('EngineOverview', () => {
       },
     };
     const mockApi = jest.fn(() => mockedApiResponse);
-    let wrapper;
+    let wrapper: ReactWrapper;
 
     beforeAll(async () => {
       wrapper = await mountWithApiMock({ get: mockApi });
@@ -105,7 +105,8 @@ describe('EngineOverview', () => {
     });
 
     describe('pagination', () => {
-      const getTablePagination = () => wrapper.find(EngineTable).first().prop('pagination');
+      const getTablePagination: () => IEngineTablePagination = () =>
+        wrapper.find(EngineTable).first().prop('pagination');
 
       it('passes down page data from the API', () => {
         const pagination = getTablePagination();
@@ -156,8 +157,8 @@ describe('EngineOverview', () => {
    * Test helpers
    */
 
-  const mountWithApiMock = async ({ get, license }) => {
-    let wrapper;
+  const mountWithApiMock = async ({ get, license }: { get(): any; license?: object }) => {
+    let wrapper: ReactWrapper | undefined;
     const httpMock = { ...mockKibanaContext.http, get };
 
     // We get a lot of act() warning/errors in the terminal without this.
@@ -166,8 +167,12 @@ describe('EngineOverview', () => {
     await act(async () => {
       wrapper = mountWithContext(<EngineOverview />, { http: httpMock, license });
     });
-    wrapper.update(); // This seems to be required for the DOM to actually update
+    if (wrapper) {
+      wrapper.update(); // This seems to be required for the DOM to actually update
 
-    return wrapper;
+      return wrapper;
+    } else {
+      throw new Error('Could not mount wrapper');
+    }
   };
 });

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/engine_overview.tsx

@@ -30,7 +30,7 @@ import { EngineTable } from './engine_table';
 
 import './engine_overview.scss';
 
-export const EngineOverview: ReactFC<> = () => {
+export const EngineOverview: React.FC = () => {
   const { http } = useContext(KibanaContext) as IKibanaContext;
   const { license } = useContext(LicenseContext) as ILicenseContext;
 
@@ -45,12 +45,12 @@ export const EngineOverview: ReactFC<> = () => {
   const [metaEnginesPage, setMetaEnginesPage] = useState(1);
   const [metaEnginesTotal, setMetaEnginesTotal] = useState(0);
 
-  const getEnginesData = async ({ type, pageIndex }) => {
+  const getEnginesData = async ({ type, pageIndex }: IGetEnginesParams) => {
     return await http.get('/api/app_search/engines', {
       query: { type, pageIndex },
     });
   };
-  const setEnginesData = async (params, callbacks) => {
+  const setEnginesData = async (params: IGetEnginesParams, callbacks: ISetEnginesCallbacks) => {
     try {
       const response = await getEnginesData(params);
 
@@ -150,3 +150,16 @@ export const EngineOverview: ReactFC<> = () => {
     </EuiPage>
   );
 };
+
+/**
+ * Type definitions
+ */
+
+interface IGetEnginesParams {
+  type: string;
+  pageIndex: number;
+}
+interface ISetEnginesCallbacks {
+  setResults: React.Dispatch<React.SetStateAction<never[]>>;
+  setResultsTotal: React.Dispatch<React.SetStateAction<number>>;
+}

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/engine_table.test.tsx

@@ -72,9 +72,9 @@ describe('EngineTable', () => {
 
   it('handles empty data', () => {
     const emptyWrapper = mountWithContext(
-      <EngineTable data={[]} pagination={{ totalEngines: 0 }} />
+      <EngineTable data={[]} pagination={{ totalEngines: 0, pageIndex: 0, onPaginate: () => {} }} />
     );
-    const emptyTable = wrapper.find(EuiBasicTable);
+    const emptyTable = emptyWrapper.find(EuiBasicTable);
     expect(emptyTable.prop('pagination').pageIndex).toEqual(0);
   });
 });

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview/engine_table.tsx

@@ -5,7 +5,7 @@
  */
 
 import React, { useContext } from 'react';
-import { EuiBasicTable, EuiLink } from '@elastic/eui';
+import { EuiBasicTable, EuiBasicTableColumn, EuiLink } from '@elastic/eui';
 import { FormattedMessage, FormattedDate, FormattedNumber } from '@kbn/i18n/react';
 import { i18n } from '@kbn/i18n';
 
@@ -14,31 +14,33 @@ import { KibanaContext, IKibanaContext } from '../../../index';
 
 import { ENGINES_PAGE_SIZE } from '../../../../../common/constants';
 
-interface IEngineTableProps {
-  data: Array<{
-    name: string;
-    created_at: string;
-    document_count: number;
-    field_count: number;
-  }>;
-  pagination: {
-    totalEngines: number;
-    pageIndex: number;
-    onPaginate(pageIndex: number);
-  };
+export interface IEngineTableData {
+  name: string;
+  created_at: string;
+  document_count: number;
+  field_count: number;
+}
+export interface IEngineTablePagination {
+  totalEngines: number;
+  pageIndex: number;
+  onPaginate(pageIndex: number): void;
+}
+export interface IEngineTableProps {
+  data: IEngineTableData[];
+  pagination: IEngineTablePagination;
 }
-interface IOnChange {
+export interface IOnChange {
   page: {
     index: number;
   };
 }
 
-export const EngineTable: ReactFC<IEngineTableProps> = ({
+export const EngineTable: React.FC<IEngineTableProps> = ({
   data,
   pagination: { totalEngines, pageIndex = 0, onPaginate },
 }) => {
   const { enterpriseSearchUrl, http } = useContext(KibanaContext) as IKibanaContext;
-  const engineLinkProps = (name) => ({
+  const engineLinkProps = (name: string) => ({
     href: `${enterpriseSearchUrl}/as/engines/${name}`,
     target: '_blank',
     onClick: () =>
@@ -50,13 +52,13 @@ export const EngineTable: ReactFC<IEngineTableProps> = ({
       }),
   });
 
-  const columns = [
+  const columns: Array<EuiBasicTableColumn<IEngineTableData>> = [
     {
       field: 'name',
       name: i18n.translate('xpack.appSearch.enginesOverview.table.column.name', {
         defaultMessage: 'Name',
       }),
-      render: (name) => (
+      render: (name: string) => (
         <EuiLink data-test-subj="engineNameLink" {...engineLinkProps(name)}>
           {name}
         </EuiLink>
@@ -65,6 +67,8 @@ export const EngineTable: ReactFC<IEngineTableProps> = ({
       truncateText: true,
       mobileOptions: {
         header: true,
+        // Note: the below props are valid props per https://elastic.github.io/eui/#/tabular-content/tables (Responsive tables), but EUI's types have a bug reporting it as an error
+        // @ts-ignore
         enlarge: true,
         fullWidth: true,
         truncateText: false,
@@ -76,7 +80,7 @@ export const EngineTable: ReactFC<IEngineTableProps> = ({
         defaultMessage: 'Created At',
       }),
       dataType: 'string',
-      render: (dateString) => (
+      render: (dateString: string) => (
         // e.g., January 1, 1970
         <FormattedDate value={new Date(dateString)} year="numeric" month="long" day="numeric" />
       ),
@@ -87,7 +91,7 @@ export const EngineTable: ReactFC<IEngineTableProps> = ({
         defaultMessage: 'Document Count',
       }),
       dataType: 'number',
-      render: (number) => <FormattedNumber value={number} />,
+      render: (number: number) => <FormattedNumber value={number} />,
       truncateText: true,
     },
     {
@@ -96,7 +100,7 @@ export const EngineTable: ReactFC<IEngineTableProps> = ({
         defaultMessage: 'Field Count',
       }),
       dataType: 'number',
-      render: (number) => <FormattedNumber value={number} />,
+      render: (number: number) => <FormattedNumber value={number} />,
       truncateText: true,
     },
     {
@@ -105,7 +109,7 @@ export const EngineTable: ReactFC<IEngineTableProps> = ({
         defaultMessage: 'Actions',
       }),
       dataType: 'string',
-      render: (name) => (
+      render: (name: string) => (
         <EuiLink {...engineLinkProps(name)}>
           <FormattedMessage
             id="xpack.appSearch.enginesOverview.table.action.manage"
@@ -128,7 +132,7 @@ export const EngineTable: ReactFC<IEngineTableProps> = ({
         totalItemCount: totalEngines,
         hidePerPageOptions: true,
       }}
-      onChange={({ page }): IOnChange => {
+      onChange={({ page }: IOnChange) => {
         const { index } = page;
         onPaginate(index + 1); // Note on paging - App Search's API pages start at 1, EuiBasicTables' pages start at 0
       }}

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview_header/engine_overview_header.test.tsx

@@ -24,8 +24,8 @@ describe('EngineOverviewHeader', () => {
     const wrapper = shallow(<EngineOverviewHeader />);
     const button = wrapper.find('[data-test-subj="launchButton"]');
 
-    expect(button.props().href).toBe('http://localhost:3002/as');
-    expect(button.props().isDisabled).toBeFalsy();
+    expect(button.prop('href')).toBe('http://localhost:3002/as');
+    expect(button.prop('isDisabled')).toBeFalsy();
 
     button.simulate('click');
     expect(sendTelemetry).toHaveBeenCalled();
@@ -35,7 +35,7 @@ describe('EngineOverviewHeader', () => {
     const wrapper = shallow(<EngineOverviewHeader isButtonDisabled />);
     const button = wrapper.find('[data-test-subj="launchButton"]');
 
-    expect(button.props().isDisabled).toBe(true);
-    expect(button.props().href).toBeUndefined();
+    expect(button.prop('isDisabled')).toBe(true);
+    expect(button.prop('href')).toBeUndefined();
   });
 });

x-pack/plugins/enterprise_search/public/applications/app_search/components/engine_overview_header/engine_overview_header.tsx

@@ -5,7 +5,14 @@
  */
 
 import React, { useContext } from 'react';
-import { EuiPageHeader, EuiPageHeaderSection, EuiTitle, EuiButton } from '@elastic/eui';
+import {
+  EuiPageHeader,
+  EuiPageHeaderSection,
+  EuiTitle,
+  EuiButton,
+  EuiButtonProps,
+  EuiLinkProps,
+} from '@elastic/eui';
 import { FormattedMessage } from '@kbn/i18n/react';
 
 import { sendTelemetry } from '../../../shared/telemetry';
@@ -24,7 +31,8 @@ export const EngineOverviewHeader: React.FC<IEngineOverviewHeaderProps> = ({
     fill: true,
     iconType: 'popout',
     'data-test-subj': 'launchButton',
-  };
+  } as EuiButtonProps & EuiLinkProps;
+
   if (isButtonDisabled) {
     buttonProps.isDisabled = true;
   } else {