From 98009ad94b92320307f2721ee39dbeb9152c0a58 Mon Sep 17 00:00:00 2001
From: Julien Brayere <julien.brayere@obitrain.com>
Date: Mon, 6 Feb 2023 08:05:59 -0800
Subject: [PATCH] fix: fix virtualizedList scrollToEnd for 0 items (#36067)

Summary:
Fixes https://github.com/facebook/react-native/issues/36066

## Changelog

[GENERAL] [FIXED] - VirtualizedList scrollToEnd with no data

Pull Request resolved: https://github.com/facebook/react-native/pull/36067

Test Plan: Run `yarn test VirtualizedList-test`

Reviewed By: jacdebug

Differential Revision: D43041763

Pulled By: javache

fbshipit-source-id: d4d5e871284708a89bf9911d82e9aa97d7625aca
---
 Libraries/Lists/VirtualizedList.js                |  3 +++
 Libraries/Lists/__tests__/VirtualizedList-test.js | 14 ++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/Libraries/Lists/VirtualizedList.js b/Libraries/Lists/VirtualizedList.js
index 2fad4637e6c57f..efce2bed49bfcd 100644
--- a/Libraries/Lists/VirtualizedList.js
+++ b/Libraries/Lists/VirtualizedList.js
@@ -167,6 +167,9 @@ export default class VirtualizedList extends StateSafePureComponent<
   scrollToEnd(params?: ?{animated?: ?boolean, ...}) {
     const animated = params ? params.animated : true;
     const veryLast = this.props.getItemCount(this.props.data) - 1;
+    if (veryLast < 0) {
+      return;
+    }
     const frame = this.__getFrameMetricsApprox(veryLast, this.props);
     const offset = Math.max(
       0,
diff --git a/Libraries/Lists/__tests__/VirtualizedList-test.js b/Libraries/Lists/__tests__/VirtualizedList-test.js
index e05f68ee8708aa..45858695abbe8b 100644
--- a/Libraries/Lists/__tests__/VirtualizedList-test.js
+++ b/Libraries/Lists/__tests__/VirtualizedList-test.js
@@ -137,6 +137,20 @@ describe('VirtualizedList', () => {
     expect(component).toMatchSnapshot();
   });
 
+  it('scrollToEnd works with null list', () => {
+    const listRef = React.createRef(null);
+    ReactTestRenderer.create(
+      <VirtualizedList
+        data={undefined}
+        renderItem={({item}) => <item value={item.key} />}
+        getItem={(data, index) => data[index]}
+        getItemCount={data => 0}
+        ref={listRef}
+      />,
+    );
+    listRef.current.scrollToEnd();
+  });
+
   it('renders empty list with empty component', () => {
     const component = ReactTestRenderer.create(
       <VirtualizedList