Tests/LibWeb: Prove we do not fail serialization of empty strings

Author: https://github.com/kennethmyhra
Commit: https://github.com/SerenityOS/serenity/commit/77b1469900
Pull-request: https://github.com/SerenityOS/serenity/pull/23438
Reviewed-by: https://github.com/ADKaster ✅

Tests/LibWeb/Text/expected/HTML/StructuredClone-object-primitives.txt

@@ -3,6 +3,7 @@ false
 123
 123.456
 This is a String object
+
 9007199254740991
 1692748800000
 /abc/gimsuy

Tests/LibWeb/Text/expected/HTML/StructuredClone-primitives.txt

@@ -5,4 +5,5 @@ false
 123
 123.456
 9007199254740991
+
 This is a string

Tests/LibWeb/Text/input/HTML/StructuredClone-object-primitives.html

@@ -6,6 +6,7 @@
         println(structuredClone(new Number(123)));
         println(structuredClone(new Number(123.456)));
         println(structuredClone(new String("This is a String object")));
+        println(structuredClone(new String("")));
         println(structuredClone(BigInt("0x1fffffffffffff")));
         println(structuredClone(Date.UTC(2023, 7, 23)));
         println(structuredClone(/abc/gimsuy));

Tests/LibWeb/Text/input/HTML/StructuredClone-primitives.html

@@ -8,6 +8,7 @@
         println(structuredClone(123));
         println(structuredClone(123.456));
         println(structuredClone(BigInt("0x1fffffffffffff")))
+        println(structuredClone(""));
         println(structuredClone("This is a string"));
     });
 </script>