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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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testing/web-platform/tests/dom/lists/DOMTokenList-iteration.html Normal file
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<!doctype html>
<meta charset=utf-8>
<title>DOMTokenList iteration: keys, values, etc.</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<span class=" a a b "></span>
<script>
test(function() {
var list = document.querySelector("span").classList;
assert_array_equals([...list], ["a", "a", "b"]);
var keys = list.keys();
assert_false(keys instanceof Array);
keys = [...keys];
assert_array_equals(keys, [0, 1, 2]);
var values = list.values();
assert_false(values instanceof Array);
values = [...values];
assert_array_equals(values, ["a", "a", "b"]);
var entries = list.entries();
assert_false(entries instanceof Array);
entries = [...entries];
assert_equals(entries.length, keys.length);
assert_equals(entries.length, values.length);
for (var i = 0; i < entries.length; ++i) {
assert_array_equals(entries[i], [keys[i], values[i]]);
}
var cur = 0;
var thisObj = {};
list.forEach(function(value, key, listObj) {
assert_equals(listObj, list);
assert_equals(this, thisObj);
assert_equals(value, values[cur]);
assert_equals(key, keys[cur]);
cur++;
}, thisObj);
assert_equals(cur, entries.length);
assert_equals(list[Symbol.iterator], Array.prototype[Symbol.iterator]);
assert_equals(list.keys, Array.prototype.keys);
if (Array.prototype.values) {
assert_equals(list.values, Array.prototype.values);
}
assert_equals(list.entries, Array.prototype.entries);
assert_equals(list.forEach, Array.prototype.forEach);
});
</script>