From 34ee899fef2ea85f027f2ca5e74d8e900252463b Mon Sep 17 00:00:00 2001
From: jackpope <jackpope@users.noreply.github.com>
Date: Tue, 26 Mar 2024 22:57:58 +0000
Subject: [PATCH] Use concurrent root in RTR (#28498)

Based on
- https://github.com/facebook/react/pull/28497
- https://github.com/facebook/react/pull/28419

Reusing the disableLegacyMode flag, we set ReactTestRenderer to always
render with concurrent root where legacy APIs are no longer available.
If disableLegacyMode is false, we continue to allow the
unstable_isConcurrent option determine the root type.

Also checking a global `IS_REACT_NATIVE_TEST_ENVIRONMENT` so we can
maintain the existing behavior for RN until we remove legacy root
support there.

DiffTrain build for [bb66aa3cef4e42aee790200d03cf7a82659da121](https://github.com/facebook/react/commit/bb66aa3cef4e42aee790200d03cf7a82659da121)
---
 compiled/facebook-www/REVISION                         |  2 +-
 compiled/facebook-www/ReactTestRenderer-dev.classic.js | 10 ++++++----
 compiled/facebook-www/ReactTestRenderer-dev.modern.js  | 10 ++++++----
 3 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/compiled/facebook-www/REVISION b/compiled/facebook-www/REVISION
index 15f52dd907b98..5db8c967ddabb 100644
--- a/compiled/facebook-www/REVISION
+++ b/compiled/facebook-www/REVISION
@@ -1 +1 @@
-84c84d72f11ff1961a103b3cd59919876e48f759
+bb66aa3cef4e42aee790200d03cf7a82659da121
diff --git a/compiled/facebook-www/ReactTestRenderer-dev.classic.js b/compiled/facebook-www/ReactTestRenderer-dev.classic.js
index 17c5a64909f2b..b7acded1c688f 100644
--- a/compiled/facebook-www/ReactTestRenderer-dev.classic.js
+++ b/compiled/facebook-www/ReactTestRenderer-dev.classic.js
@@ -144,6 +144,7 @@ if (__DEV__) {
     var enableLegacyHidden = false;
     var enableAsyncActions = true;
     var alwaysThrottleRetries = true;
+    var disableLegacyMode = false;
 
     var FunctionComponent = 0;
     var ClassComponent = 1;
@@ -26108,7 +26109,7 @@ if (__DEV__) {
       return root;
     }
 
-    var ReactVersion = "19.0.0-www-classic-4c1f5e46";
+    var ReactVersion = "19.0.0-www-classic-ac0f08bc";
 
     // Might add PROFILE later.
 
@@ -27002,7 +27003,8 @@ if (__DEV__) {
 
     function create(element, options) {
       var createNodeMock = defaultTestOptions.createNodeMock;
-      var isConcurrent = false;
+      var isConcurrentOnly = disableLegacyMode === true;
+      var isConcurrent = isConcurrentOnly;
       var isStrictMode = false;
       var concurrentUpdatesByDefault = null;
 
@@ -27012,8 +27014,8 @@ if (__DEV__) {
           createNodeMock = options.createNodeMock;
         }
 
-        if (options.unstable_isConcurrent === true) {
-          isConcurrent = true;
+        {
+          isConcurrent = options.unstable_isConcurrent;
         }
 
         if (options.unstable_strictMode === true) {
diff --git a/compiled/facebook-www/ReactTestRenderer-dev.modern.js b/compiled/facebook-www/ReactTestRenderer-dev.modern.js
index d87e622c68138..b21fa01507263 100644
--- a/compiled/facebook-www/ReactTestRenderer-dev.modern.js
+++ b/compiled/facebook-www/ReactTestRenderer-dev.modern.js
@@ -144,6 +144,7 @@ if (__DEV__) {
     var enableLegacyHidden = false;
     var enableAsyncActions = true;
     var alwaysThrottleRetries = true;
+    var disableLegacyMode = false;
 
     var FunctionComponent = 0;
     var ClassComponent = 1;
@@ -26108,7 +26109,7 @@ if (__DEV__) {
       return root;
     }
 
-    var ReactVersion = "19.0.0-www-modern-4c1f5e46";
+    var ReactVersion = "19.0.0-www-modern-ac0f08bc";
 
     // Might add PROFILE later.
 
@@ -27002,7 +27003,8 @@ if (__DEV__) {
 
     function create(element, options) {
       var createNodeMock = defaultTestOptions.createNodeMock;
-      var isConcurrent = false;
+      var isConcurrentOnly = disableLegacyMode === true;
+      var isConcurrent = isConcurrentOnly;
       var isStrictMode = false;
       var concurrentUpdatesByDefault = null;
 
@@ -27012,8 +27014,8 @@ if (__DEV__) {
           createNodeMock = options.createNodeMock;
         }
 
-        if (options.unstable_isConcurrent === true) {
-          isConcurrent = true;
+        {
+          isConcurrent = options.unstable_isConcurrent;
         }
 
         if (options.unstable_strictMode === true) {