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<!DOCTYPE html>
<title>Interfaces</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
function testInterfaceDeletable(iface) {
test(function() {
assert_true(!!window[iface], "Interface should exist.")
assert_true(delete window[iface], "The delete operator should return true.")
assert_equals(window[iface], undefined, "Interface should be gone.")
}, "Should be able to delete " + iface + ".")
}
var interfaces = [
"Event",
"CustomEvent",
"EventTarget",
"AbortController",
"AbortSignal",
"Node",
"Document",
"DOMImplementation",
"DocumentFragment",
"ProcessingInstruction",
"DocumentType",
"Element",
"Attr",
"CharacterData",
"Text",
"Comment",
"NodeIterator",
"TreeWalker",
"NodeFilter",
"NodeList",
"HTMLCollection",
"DOMTokenList"
];
test(function() {
for (var p in window) {
interfaces.forEach(function(i) {
assert_not_equals(p, i)
})
}
}, "Interface objects properties should not be Enumerable")
interfaces.forEach(testInterfaceDeletable);
</script>
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