test: update test coverage

src/editors/EditorContainer.tsx

@@ -21,7 +21,7 @@ const EditorContainer: React.FC<Props> = ({
 }) => {
   const { blockType, blockId } = useParams();
   if (blockType === undefined || blockId === undefined) {
-    // This shouldn't be possible; it's just here to satisfy the type checker.
+    // istanbul ignore next - This shouldn't be possible; it's just here to satisfy the type checker.
     return <div>Error: missing URL parameters</div>;
   }
   return (

src/generic/toast-context/index.tsx

@@ -16,11 +16,11 @@ export interface ToastProviderProps {
  * Global context to keep track of popup message(s) that appears to user after
  * they take an action like creating or deleting something.
  */
-export const ToastContext = React.createContext({
+export const ToastContext = React.createContext<ToastContextData>({
   toastMessage: null,
   showToast: () => {},
   closeToast: () => {},
-} as ToastContextData);
+});
 
 /**
  * React component to provide `ToastContext` to the app

src/library-authoring/LibraryAuthoringPage.tsx

@@ -120,6 +120,7 @@ const LibraryAuthoringPage = () => {
 
   const { libraryId } = useParams();
   if (!libraryId) {
+    // istanbul ignore next - This shouldn't be possible; it's just here to satisfy the type checker.
     throw new Error('Rendered without libraryId URL parameter');
   }
   const { data: libraryData, isLoading } = useContentLibrary(libraryId);

src/library-authoring/LibraryLayout.tsx

@@ -18,7 +18,8 @@ const LibraryLayout = () => {
   const queryClient = useQueryClient();
 
   if (libraryId === undefined) {
-    throw new Error('Error: route is missing libraryId.'); // Should never happen
+    // istanbul ignore next - This shouldn't be possible; it's just here to satisfy the type checker.
+    throw new Error('Error: route is missing libraryId.');
   }
 
   const navigate = useNavigate();

src/library-authoring/add-content/AddContentWorkflow.test.tsx

@@ -47,11 +47,8 @@ const renderOpts = {
 };
 
 describe('AddContentWorkflow test', () => {
-  beforeEach(() => {
-    initializeMocks();
-  });
-
   it('can create an HTML component', async () => {
+    initializeMocks();
     render(<LibraryLayout />, renderOpts);
 
     // Click "New [Component]"
@@ -86,4 +83,22 @@ describe('AddContentWorkflow test', () => {
     fireEvent.click(saveButton);
     expect(saveSpy).toHaveBeenCalledTimes(1);
   });
+
+  it('can create a Problem component', async () => {
+    const { mockShowToast } = initializeMocks();
+    render(<LibraryLayout />, renderOpts);
+
+    // Click "New [Component]"
+    const newComponentButton = await screen.findByRole('button', { name: /New/ });
+    fireEvent.click(newComponentButton);
+
+    // Pre-condition - this is NOT shown yet:
+    expect(screen.queryByText('Content created successfully.')).not.toBeInTheDocument();
+
+    // Click "Problem" to create a capa problem component
+    fireEvent.click(await screen.findByRole('button', { name: /Problem/ }));
+
+    // We haven't yet implemented the problem editor, so we expect only a toast to appear
+    await waitFor(() => expect(mockShowToast).toHaveBeenCalledWith('Content created successfully.'));
+  });
 });

src/library-authoring/component-info/ComponentDeveloperInfo.tsx

@@ -9,6 +9,7 @@ interface Props {
   usageKey: string;
 }
 
+/* istanbul ignore next */
 export const ComponentDeveloperInfo: React.FC<Props> = ({ usageKey }) => {
   const { data: olx, isLoading: isOLXLoading } = useXBlockOLX(usageKey);
   return (

src/library-authoring/data/api.mocks.ts

@@ -115,6 +115,9 @@ export async function mockCreateLibraryBlock(
   if (args.blockType === 'html' && args.libraryId === mockContentLibrary.libraryId) {
     return mockCreateLibraryBlock.newHtmlData;
   }
+  if (args.blockType === 'problem' && args.libraryId === mockContentLibrary.libraryId) {
+    return mockCreateLibraryBlock.newProblemData;
+  }
   throw new Error(`mockCreateLibraryBlock doesn't know how to mock ${JSON.stringify(args)}`);
 }
 mockCreateLibraryBlock.newHtmlData = {
@@ -125,6 +128,14 @@ mockCreateLibraryBlock.newHtmlData = {
   hasUnpublishedChanges: true,
   tagsCount: 0,
 } satisfies api.CreateBlockDataResponse;
+mockCreateLibraryBlock.newProblemData = {
+  id: 'lb:Axim:TEST:problem:prob1',
+  defKey: 'prob1',
+  blockType: 'problem',
+  displayName: 'New Problem',
+  hasUnpublishedChanges: true,
+  tagsCount: 0,
+} satisfies api.CreateBlockDataResponse;
 /** Apply this mock. Returns a spy object that can tell you if it's been called. */
 mockCreateLibraryBlock.applyMock = () => (
   jest.spyOn(api, 'createLibraryBlock').mockImplementation(mockCreateLibraryBlock)

src/library-authoring/data/apiHooks.ts

@@ -242,6 +242,7 @@ export const useUpdateXBlockFields = (usageKey: string) => {
   });
 };
 
+/* istanbul ignore next */ // This is only used in developer builds, and the associated UI doesn't work in test or prod
 export const useXBlockOLX = (usageKey: string) => (
   useQuery({
     queryKey: libraryAuthoringQueryKeys.xblockOLX(usageKey),

src/testUtils.tsx

@@ -7,6 +7,7 @@
  */
 import React from 'react';
 import { AxiosError } from 'axios';
+import { jest } from '@jest/globals';
 import { initializeMockApp } from '@edx/frontend-platform';
 import { getAuthenticatedHttpClient } from '@edx/frontend-platform/auth';
 import { IntlProvider } from '@edx/frontend-platform/i18n';
@@ -21,13 +22,21 @@ import {
   Routes,
 } from 'react-router-dom';
 
+import { ToastContext, type ToastContextData } from './generic/toast-context';
 import initializeReduxStore from './store';
 
 /** @deprecated */
 let reduxStore;
 let queryClient;
 let axiosMock: MockAdapter;
 
+/** To use this: `const { mockShowToast } = initializeMocks()` and `expect(mockShowToast).toHaveBeenCalled()` */
+let mockToastContext: ToastContextData = {
+  showToast: jest.fn(),
+  closeToast: jest.fn(),
+  toastMessage: null,
+};
+
 export interface RouteOptions {
   /** The URL path, like '/libraries/:libraryId' */
   path?: string;
@@ -75,9 +84,11 @@ function makeWrapper({ ...routeArgs }: RouteOptions) {
     <AppProvider store={reduxStore} wrapWithRouter={false}>
       <IntlProvider locale="en" messages={{}}>
         <QueryClientProvider client={queryClient}>
-          <RouterAndRoute {...routeArgs}>
-            {children}
-          </RouterAndRoute>
+          <ToastContext.Provider value={mockToastContext}>
+            <RouterAndRoute {...routeArgs}>
+              {children}
+            </RouterAndRoute>
+          </ToastContext.Provider>
         </QueryClientProvider>
       </IntlProvider>
     </AppProvider>
@@ -114,9 +125,17 @@ export function initializeMocks({ user = defaultUser } = {}) {
   });
   axiosMock = new MockAdapter(getAuthenticatedHttpClient());
 
+  // Reset `mockToastContext` for this current test
+  mockToastContext = {
+    showToast: jest.fn(),
+    closeToast: jest.fn(),
+    toastMessage: null,
+  };
+
   return {
     reduxStore,
     axiosMock,
+    mockShowToast: mockToastContext.showToast,
   };
 }