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Test foster parenting into a Document with an element child #61396

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36 changes: 36 additions & 0 deletions html/syntax/parsing/foster-parenting-into-document-with-element-child.html
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@@ -0,0 +1,36 @@
<!DOCTYPE html>
<meta charset="utf-8">
<title>Foster parenting into another Document that already has an element child</title>
<link rel="help" href="https://html.spec.whatwg.org/multipage/parsing.html#insert-an-element-at-the-adjusted-insertion-location">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
// The inline script makes the on-stack <table> the document element of a second
// Document; the following <b> is then foster-parented into that Document, which
// already has an element child, and so must be dropped on the floor.
const SRCDOC = `<table><tr><script>
var other = document.implementation.createHTMLDocument("");
other.documentElement.remove();
other.appendChild(document.querySelector("table"));
window.other = other;
<\/script><b id="fostered">x</b>`;

async_test(t => {
const iframe = document.createElement("iframe");
iframe.srcdoc = SRCDOC;
iframe.onload = t.step_func_done(() => {
const other = iframe.contentWindow.other;
const table = other.querySelector("table");
assert_true(!!table, "table was moved into the second Document");
assert_equals(table.parentNode, other, "table is the second Document's child");

const outcome = other.getElementById("fostered") ? "inserted-into-second-document"
: iframe.contentDocument.getElementById("fostered") ? "inserted-into-iframe-document"
: "dropped";
assert_equals(outcome, "dropped", "the foster-parented <b> should be dropped on the floor");
assert_equals(other.childElementCount, 1, "the second Document should still have one element child (the table)");
});
document.body.appendChild(iframe);
}, "A foster-parented element whose adjusted insertion location is another Document that already has an element child is dropped on the floor");
</script>
1 change: 1 addition & 0 deletions html/syntax/parsing/html5lib_url.html
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Expand Up @@ -29,6 +29,7 @@
<meta name="variant" content="?file=scriptdata01">
<meta name="variant" content="?file=scripted_adoption01">
<meta name="variant" content="?file=scripted_ark">
<meta name="variant" content="?file=scripted_foster01">
<meta name="variant" content="?file=scripted_webkit01">
<meta name="variant" content="?file=search-element">
<meta name="variant" content="?file=svg">
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1 change: 1 addition & 0 deletions html/syntax/parsing/html5lib_write.html
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Expand Up @@ -27,6 +27,7 @@
<meta name="variant" content="?file=scriptdata01">
<meta name="variant" content="?file=scripted_adoption01">
<meta name="variant" content="?file=scripted_ark">
<meta name="variant" content="?file=scripted_foster01">
<meta name="variant" content="?file=scripted_webkit01">
<meta name="variant" content="?file=search-element">
<meta name="variant" content="?file=tables01">
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1 change: 1 addition & 0 deletions html/syntax/parsing/html5lib_write_single.html
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Expand Up @@ -27,6 +27,7 @@
<meta name="variant" content="?file=scriptdata01">
<meta name="variant" content="?file=scripted_adoption01">
<meta name="variant" content="?file=scripted_ark">
<meta name="variant" content="?file=scripted_foster01">
<meta name="variant" content="?file=scripted_webkit01">
<meta name="variant" content="?file=search-element">
<meta name="variant" content="?file=tables01">
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21 changes: 21 additions & 0 deletions html/syntax/parsing/resources/scripted_foster01.dat
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#data
<table><tr><script>var t=document.querySelector('table');document.documentElement.remove();document.appendChild(t)</script><b>
#errors
#script-on
#document
| <table>
| <tbody>
| <tr>
| <script>
| "var t=document.querySelector('table');document.documentElement.remove();document.appendChild(t)"

#data
<table><tr><script>var t=document.querySelector('table');document.documentElement.remove();document.appendChild(t)</script>FOSTERTEXT
#errors
#script-on
#document
| <table>
| <tbody>
| <tr>
| <script>
| "var t=document.querySelector('table');document.documentElement.remove();document.appendChild(t)"
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