Allow scanning if continuous export is disabled and there's no USB dr…

…ive (#5566)

apps/scan/backend/src/app_flow.test.ts

@@ -270,25 +270,28 @@ test('unconfigured:precinct', async () => {
   ).toEqual(false);
 });
 
-test('insert_usb_drive', async () => {
+test('USB drive removed', async () => {
   const auth = buildMockInsertedSmartCardAuth();
   const store = Store.memoryStore();
   const mockUsbDrive = createMockUsbDrive();
-  const pollWorkerUser = mockPollWorkerUser({ electionKey });
 
+  mockUsbDrive.insertUsbDrive({});
   store.setElectionAndJurisdiction({
     electionData: electionDefinition.electionData,
     jurisdiction: TEST_JURISDICTION,
     electionPackageHash,
   });
+  store.setPrecinctSelection(ALL_PRECINCTS_SELECTION);
+  store.transitionPolls({ type: 'open_polls', time: Date.now() });
 
-  auth.getAuthStatus.mockResolvedValue({
-    status: 'logged_in',
-    user: pollWorkerUser,
-    sessionExpiresAt: mockSessionExpiresAt(),
-  });
+  expect(
+    await isReadyToScan({
+      auth,
+      store,
+      usbDrive: mockUsbDrive.usbDrive,
+    })
+  ).toEqual(true);
 
-  store.setPrecinctSelection(ALL_PRECINCTS_SELECTION);
   mockUsbDrive.removeUsbDrive();
 
   expect(
@@ -298,6 +301,16 @@ test('insert_usb_drive', async () => {
       usbDrive: mockUsbDrive.usbDrive,
     })
   ).toEqual(false);
+
+  store.setIsContinuousExportEnabled(false);
+
+  expect(
+    await isReadyToScan({
+      auth,
+      store,
+      usbDrive: mockUsbDrive.usbDrive,
+    })
+  ).toEqual(true);
 });
 
 test('logged_in:poll_worker', async () => {

apps/scan/backend/src/app_flow.ts

@@ -48,8 +48,11 @@ export async function isReadyToScan({
 
   const usbDriveStatus = await usbDrive.status();
 
-  // If there is no USB drive, we can't scan.
-  if (usbDriveStatus.status !== 'mounted') {
+  // If continuous CVR export to USB drive is enabled but there's no USB drive, we can't scan.
+  if (
+    store.getIsContinuousExportEnabled() &&
+    usbDriveStatus.status !== 'mounted'
+  ) {
     return false;
   }