From beaffd7a907ae47bda762a320a8f7ebb428f049f Mon Sep 17 00:00:00 2001
From: Victoria Ashworth <15619084+vashworth@users.noreply.github.com>
Date: Tue, 28 Nov 2023 13:53:09 -0600
Subject: [PATCH] Skip unexpected events in
 MultiPlatformViewBackgroundForegroundScenario (#48456)

Fixes https://github.com/flutter/flutter/issues/138193.

Was first attempted to fix in https://github.com/flutter/engine/pull/48096, but that was not reliable since it's all asynchronous.

[C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
---
 testing/scenario_app/lib/src/platform_view.dart | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/testing/scenario_app/lib/src/platform_view.dart b/testing/scenario_app/lib/src/platform_view.dart
index 7c15465dc9ea8..92679d2a94ae1 100644
--- a/testing/scenario_app/lib/src/platform_view.dart
+++ b/testing/scenario_app/lib/src/platform_view.dart
@@ -510,6 +510,13 @@ class MultiPlatformViewBackgroundForegroundScenario extends Scenario
     PlatformMessageResponseCallback? callback,
   ) {
     final String message = utf8.decode(data!.buffer.asUint8List());
+
+    // The expected first event should be 'AppLifecycleState.resumed', but
+    // occasionally it will receive 'AppLifecycleState.inactive' first. Skip
+    // any messages until 'AppLifecycleState.resumed' is received.
+    if (_lastLifecycleState.isEmpty && message != 'AppLifecycleState.resumed') {
+      return;
+    }
     if (_lastLifecycleState == 'AppLifecycleState.inactive' &&
         message == 'AppLifecycleState.resumed') {
       _nextFrame = _secondFrame;