feat: add test files

Author: MichaelVerdon

packages/firestore/e2e/DocumentReference/onSnapshotsInSync.e2e.js

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2016-present Invertase Limited & Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this library except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+const COLLECTION = 'firestore';
+const NO_RULE_COLLECTION = 'no_rules';
+const { wipe } = require('../helpers');
+import { onSnapshotsInSync } from '../../lib/modular/snapshot';
+
+describe('firestore().doc().onSnapshot()', function () {
+  before(function () {
+    return wipe();
+  });
+
+  describe('modular', function () {
+    it('onSnapshotsInSync() returns an unsubscribe function', function () {
+        const firestore = firebase.firestore();
+        const unsubscribe = firestore.onSnapshotsInSync(function () {});
+    
+        expect(unsubscribe).to.be.a('function');
+        expect(unsubscribe()).to.equal(undefined);
+    });
+  });
+});

packages/firestore/lib/modular/snapshot.js

@@ -20,5 +20,5 @@ export function snapshotEqual(left, right) {
 }
 
 export function onSnapshotsInSync(firestore, ...args) {
-  return firestore.onSnapshotsInSync.call(firestore, ...args, MODULAR_DEPRECATION_ARG);
+  return firestore.addSnapshotsInSyncListener.call(firestore, ...args, MODULAR_DEPRECATION_ARG);
 }