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<!DOCTYPE html>
<script src="/resources/testharness.js" ></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/helper.sub.js"></script>
<body>
<script>
test(t => {
assert_equals(window.trustedTypes.defaultPolicy, null);
}, "defaultPolicy with no default created is not an error");
test(t => {
let policy = window.trustedTypes.createPolicy('default', { createHTML: s => s } );
assert_true(policy instanceof TrustedTypePolicy);
assert_equals(policy, window.trustedTypes.defaultPolicy);
}, "defaultPolicy returns the correct default policy");
test(t => {
let foo_policy = window.trustedTypes.createPolicy('foo', { createHTML: s => s } );
let default_policy = window.trustedTypes.defaultPolicy;
window.trustedTypes.defaultPolicy = foo_policy;
assert_equals(window.trustedTypes.defaultPolicy, default_policy);
assert_not_equals(window.trustedTypes.defaultPolicy, foo_policy);
}, "defaultPolicy is a read-only property");
</script>
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