Import manifests from state, if provided

__tests__/src/reducers/manifests.test.js

@@ -89,9 +89,9 @@ describe('manifests reducer', () => {
     });
   });
   it('should handle IMPORT_MIRADOR_STATE setting to clean state', () => {
-    expect(manifestsReducer({}, {
+    expect(manifestsReducer({ old: 'stuff' }, {
       state: { manifests: { new: 'stuff' } },
       type: ActionTypes.IMPORT_MIRADOR_STATE,
-    })).toEqual({});
+    })).toEqual({ new: 'stuff' });
   });
 });

src/state/reducers/manifests.js

@@ -44,7 +44,7 @@ export const manifestsReducer = (state = {}, action) => {
         return object;
       }, {});
     case ActionTypes.IMPORT_MIRADOR_STATE:
-      return {};
+      return action.state.manifests || {};
     default: return state;
   }
 };