Set bookmark parent ID to 0 if parentFolderObjectId is empty

fix brave/sync#107

Test Plan:
follow test plan in brave/sync#107

js/state/syncUtil.js

@@ -120,8 +120,10 @@ module.exports.getSiteDataFromRecord = (record, appState, records) => {
     if (parentFolderObjectId && parentFolderObjectId.length > 0) {
       siteProps.parentFolderId =
         getFolderIdByObjectId(new Immutable.List(parentFolderObjectId), appState, records)
-    } else if (siteProps.hideInToolbar === true) {
-      siteProps.parentFolderId = -1
+    } else {
+      // Null or empty parentFolderObjectId on a record corresponds to
+      // a top-level bookmark. -1 indicates a hidden bookmark.
+      siteProps.parentFolderId = siteProps.hideInToolbar ? -1 : 0
     }
   }
   const siteDetail = new Immutable.Map(pickFields(siteProps, SITE_FIELDS))

test/unit/state/syncUtilTest.js

@@ -2,6 +2,7 @@
 
 const syncUtil = require('../../../js/state/syncUtil')
 const assert = require('assert')
+const Immutable = require('immutable')
 
 describe('syncUtil', () => {
   describe('createSiteData()', () => {
@@ -150,4 +151,65 @@ describe('syncUtil', () => {
       assert.deepEqual(syncUtil.ipcSafeObject(deepObject), deepExpected)
     })
   })
+
+  describe('getSiteDataFromRecord()', () => {
+    it('update bookmark parent folder to null -> overrides existing parent folder', () => {
+      const objectId = [96, 46, 213, 0, 13, 111, 180, 184, 65, 66, 173, 27, 207, 29, 32, 108]
+      const records = [{
+        action: 1,
+        bookmark: {
+          isFolder: true,
+          parentFolderObjectId: null,
+          site: {
+            creationTime: 0,
+            customTitle: '',
+            favicon: '',
+            lastAccessedTime: 0,
+            location: '',
+            title: 'Folder1'
+          }
+        },
+        deviceId: [1],
+        objectData: 'bookmark',
+        objectId,
+        syncTimestamp: 1499736988267
+      }]
+      const existingObject = {
+        lastAccessedTime: 0,
+        tags: ['bookmark-folder'],
+        objectId,
+        order: 9,
+        folderId: 2,
+        customTitle: 'Folder1', // XXX: Android uses title whereas laptop uses customTitle
+        parentFolderId: 1
+      }
+      const appState = {
+        sites: {
+          '2': existingObject
+        },
+        sync: {
+          objectsById: {
+            [objectId.join('|')]: ['sites', '2']
+          }
+        }
+      }
+      const result = syncUtil.getSiteDataFromRecord(records[0],
+        Immutable.fromJS(appState), Immutable.fromJS(records))
+      assert.equal(result.tag, 'bookmark-folder')
+      assert.deepEqual(result.siteDetail.toJS(),
+        {
+          objectId,
+          title: 'Folder1',
+          favicon: '',
+          location: '',
+          parentFolderId: 0,
+          folderId: 2,
+          tags: ['bookmark-folder'],
+          lastAccessedTime: 0,
+          creationTime: 0
+        }
+      )
+      assert.deepEqual(result.existingObjectData.toJS(), existingObject)
+    })
+  })
 })