LibWeb: Handle unpaired surrogates in USVStrings

This should fix (at least) the last two remaining WPT test failures in FileAPI/unicode.html.
Author: https://github.com/justus2510 Commit: 55f0dc823f Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1761 Reviewed-by: https://github.com/shannonbooth ✅ Reviewed-by: https://github.com/tcl3 ✅
2025-08-08 01:00:05 +00:00 · 2024-10-13 03:52:16 +02:00 · 2024-10-13 03:52:16 +02:00 · 55f0dc823f · 2024-10-13 21:25:25 +00:00
commit 55f0dc823f
parent 5559a3dc6e
3 changed files with 26 additions and 4 deletions
--- a/Tests/LibWeb/Text/input/FileAPI/unpaired-surrogates-in-constructor.html
+++ b/Tests/LibWeb/Text/input/FileAPI/unpaired-surrogates-in-constructor.html
@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<script src="../include.js"></script>
+<script>
+    asyncTest(async (done) => {
+        const unpairedSurrogates = "hello\uDC00friends\uD800:)";
+        const replacedSurrogates = "hello\uFFFDfriends\uFFFD:)";
+
+        const blob = new Blob([unpairedSurrogates]);
+        println(await blob.text() === replacedSurrogates ? "PASS" : "FAIL")
+
+        const file = new File([unpairedSurrogates], "someFileName");
+        println(await file.text() === replacedSurrogates ? "PASS" : "FAIL")
+
+        done();
+    });
+</script>