LayoutTests/editing/inserting/insert-paragraph-before-space.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf8">
    <script src="../../resources/dump-as-markup.js"></script>
    <script>
        addEventListener("DOMContentLoaded", () => {
            document.designMode = "on";
            Markup.description("Verifies that inserting a paragraph before a space does not cause text after the insertion position to be deleted.");

            getSelection().setPosition(document.querySelector("p").childNodes[0], 5);

            Markup.dump(document.body, "Before inserting paragraph");
            document.execCommand("InsertParagraph");
            Markup.dump(document.body, "After inserting paragraph");
        });
    </script>
</head>
<body>
    <p>Hello world</p>
</body>
</html>