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[Trusted Types] Obey TT in createHTMLDocument-created documents. #19992

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merged 1 commit into from Nov 4, 2019
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[Trusted Types] Obey TT in createHTMLDocument-created documents. #19992

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36 changes: 36 additions & 0 deletions trusted-types/trusted-types-createHTMLDocument.tentative.html
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@@ -0,0 +1,36 @@
<!DOCTYPE html>
<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/content-security-policy/support/testharness-helper.js"></script>
<meta http-equiv="Content-Security-Policy" content="trusted-types *">
</head>
<body>
<script>

test(t => {
function try_assign(doc) {
doc.createElement("script").textContent = "2+2";
}
assert_throws(new TypeError(),
_ => try_assign(document),
"Trusted Type assignment throws in main document");
assert_throws(new TypeError(),
_ => try_assign(document.implementation.createHTMLDocument("")),
"Trusted Type assignment throws in created document");
}, "Trusted Types work in createHTMLDocument");

test(t => {
const policy = trustedTypes.createPolicy("policy", {createHTML: x => x });
const value = policy.createHTML("hello");
const doc = document.implementation.createHTMLDocument("");
doc.body.innerHTML = value;
assert_equals(doc.body.textContent, "hello");
assert_throws(new TypeError(),
_ => { doc.body.innerHTML = "world"; },
"Cannot assign text value.");
assert_equals(doc.body.textContent, "hello");
}, "Trusted Type instances can be used in createHTMLDocument");

</script>
</body>