Fix test runner

Author: schmidt-sebastian

packages/firestore/test/unit/local/remote_document_cache.test.ts

@@ -34,6 +34,7 @@ import {
 } from '../../../src/model/collections';
 import * as persistenceHelpers from './persistence_test_helpers';
 import { TestRemoteDocumentCache } from './test_remote_document_cache';
+import { remoteDocumentCacheGetLastReadTime } from '../../../src/local/indexeddb_remote_document_cache';
 
 // Helpers for use throughout tests.
 const DOC_PATH = 'a/b';
@@ -91,8 +92,7 @@ describe('IndexedDbRemoteDocumentCache', () => {
 
   function getLastReadTime(): Promise<SnapshotVersion> {
     return persistence.runTransaction('getLastReadTime', 'readonly', txn => {
-      const remoteDocuments = persistence.getRemoteDocumentCache();
-      return remoteDocuments.getLastReadTime(txn);
+      return remoteDocumentCacheGetLastReadTime(txn);
     });
   }
 

packages/firestore/test/unit/local/test_remote_document_cache.ts

@@ -20,7 +20,10 @@ import { SnapshotVersion } from '../../../src/core/snapshot_version';
 import { Persistence } from '../../../src/local/persistence';
 import { PersistencePromise } from '../../../src/local/persistence_promise';
 import { RemoteDocumentCache } from '../../../src/local/remote_document_cache';
-import { IndexedDbRemoteDocumentCache } from '../../../src/local/indexeddb_remote_document_cache';
+import {
+  IndexedDbRemoteDocumentCache,
+  remoteDocumentCacheGetNewDocumentChanges
+} from '../../../src/local/indexeddb_remote_document_cache';
 import { RemoteDocumentChangeBuffer } from '../../../src/local/remote_document_change_buffer';
 import {
   DocumentKeySet,
@@ -132,11 +135,11 @@ export class TestRemoteDocumentCache {
       'getNewDocumentChanges',
       'readonly',
       txn => {
-        debugAssert(
-          this.cache instanceof IndexedDbRemoteDocumentCache,
-          'getNewDocumentChanges() requires IndexedDB'
+        return remoteDocumentCacheGetNewDocumentChanges(
+          this.cache,
+          txn,
+          sinceReadTime
         );
-        return this.cache.getNewDocumentChanges(txn, sinceReadTime);
       }
     );
   }