From 08a3c562f31fa7bc33dcde2005a80401909f184b Mon Sep 17 00:00:00 2001
From: Andrew Kaster <akaster@serenityos.org>
Date: Thu, 25 Jan 2024 10:29:02 -0700
Subject: [PATCH] LibWeb: Resolve postMessage test promises if iframes already
 loaded

For some reason on macOS with ASAN enabled, the test promises in
HTML/Window-postMessage do not resolve. These promises wait for both
the in-document and the blob url iframes to load. It's not clear why
this works fine in Linux nor why the onload handler doesn't fire
when the iframe has already loaded.
---
 Tests/LibWeb/TestConfig.ini                        |  1 -
 .../LibWeb/Text/input/HTML/Window-postMessage.html | 14 ++++++++++++--
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/Tests/LibWeb/TestConfig.ini b/Tests/LibWeb/TestConfig.ini
index ad8863712a..24bea23b45 100644
--- a/Tests/LibWeb/TestConfig.ini
+++ b/Tests/LibWeb/TestConfig.ini
@@ -1,4 +1,3 @@
 [Skipped]
-Text/input/HTML/Window-postMessage.html
 Text/input/Worker/Worker-echo.html
 Text/input/window-scrollTo.html
diff --git a/Tests/LibWeb/Text/input/HTML/Window-postMessage.html b/Tests/LibWeb/Text/input/HTML/Window-postMessage.html
index ec8f9608d6..153eaa0952 100644
--- a/Tests/LibWeb/Text/input/HTML/Window-postMessage.html
+++ b/Tests/LibWeb/Text/input/HTML/Window-postMessage.html
@@ -127,11 +127,21 @@
         globalThis.doneCallback = done;
 
         const blobIframeLoadPromise = new Promise(resolve => {
-            blobIframe.onload = () => resolve();
+            if (blobIframe.contentDocument.readyState === "complete") {
+                resolve();
+            }
+            else {
+                blobIframe.onload = () => resolve();
+            }
         });
 
         const srcdocIframeLoadPromise = new Promise(resolve => {
-            iframe.onload = () => resolve();
+            if (iframe.contentDocument.readyState === "complete") {
+                resolve()
+            }
+            else {
+                iframe.onload = () => resolve();
+            }
         });
 
         Promise.all([blobIframeLoadPromise, srcdocIframeLoadPromise]).then(() => {