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<!doctype html>
<title>HighlightRegistry has a maplike interface</title>
<link rel="help" href="https://drafts.csswg.org/css-highlight-api-1/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
test(() => {
assert_not_equals(window.HighlightRegistry, undefined, 'HighlightRegistry is in window');
assert_equals(typeof HighlightRegistry, 'function', 'HighlightRegistry is a function');
assert_throws_js(TypeError, function () { var x = new HighlightRegistry(); },
'HighlightRegistry constructor throws');
assert_not_equals(CSS.highlights, undefined, 'CSS.highlights exists');
assert_equals(CSS.highlights.__proto__, window.HighlightRegistry.prototype,
'CSS.highlights and window.HighlightRegistry have same prototype');
assert_equals(CSS.highlights.size, 0, 'HighlightRegistry starts empty');
}, 'HighlightRegistry initializes as it should.');
test(() => {
let name1 = "example1";
let name2 = "example2";
let h1 = new Highlight();
let h2 = new Highlight();
assert_false(CSS.highlights.has(name1), 'HighlightRegistry.has returns false when it doesn\'t have the key which is called with as argument.');
CSS.highlights.set(name1, h1);
assert_true(CSS.highlights.has(name1), 'HighlightRegistry.has returns true when it has the key which is called with as argument.');
assert_equals(CSS.highlights.size, 1, 'HighlightRegistry.size is 1 after only inserting 1 key.');
assert_false(CSS.highlights.delete(name2), 'HighlightRegistry.delete returns false when trying to delete an key that is not in the map.');
assert_equals(CSS.highlights.size, 1, 'HighlightRegistry.size stays the same after trying to delete a non-existing key.');
CSS.highlights.set(name2, h2);
assert_true(CSS.highlights.has(name1), 'HighlightRegistry.has returns true when it is called with the key inserted first');
assert_true(CSS.highlights.has(name2), 'HighlightRegistry.has returns true when it is called with the key inserted second');
assert_equals(CSS.highlights.get(name1), h1, 'HighlightRegistry.get returns the first Highlight when it is called with the key inserted first');
assert_equals(CSS.highlights.get(name2), h2, 'HighlightRegistry.get returns the second Highlight when it is called with the key inserted second');
assert_equals(CSS.highlights.size, 2, 'HighlightRegistry.size is 2 after only inserting two different keys.');
assert_true(CSS.highlights.delete(name2), 'HighlightRegistry.delete returns true when trying to delete a key that is in the group.');
assert_true(CSS.highlights.has(name1), 'HighlightRegistry.has returns true when it is called with the key inserted first');
assert_false(CSS.highlights.has(name2), 'HighlightRegistry.has returns true when it is called with the key that was deleted');
assert_equals(CSS.highlights.get(name1), h1, 'HighlightRegistry.get still returns the first Highlight when it is called with the key inserted first');
assert_equals(CSS.highlights.get(name2), undefined, 'HighlightRegistry.get returns undefined when it is called with a key that was deleted');
assert_equals(CSS.highlights.size, 1, 'HighlightRegistry.size decreases in 1 after deleting an existing key.');
assert_false(CSS.highlights.delete(name2), 'HighlightRegistry.delete returns false when trying to delete a key that was already deleted.');
assert_true(CSS.highlights.has(name1), 'HighlightRegistry.has returns true when it is called with the key inserted first');
assert_false(CSS.highlights.has(name2), 'HighlightRegistry.has returns false when it is called with a key that was deleted twice');
assert_equals(CSS.highlights.get(name1), h1, 'HighlightRegistry.get still returns the first Highlight when it is called with the key inserted first');
assert_equals(CSS.highlights.get(name2), undefined, 'HighlightRegistry.get still returns undefined when it is called with a key that was deleted');
assert_equals(CSS.highlights.size, 1, 'HighlightRegistry.size stays the same after trying to delete the same key for a second time.');
assert_true(CSS.highlights.delete(name1), 'HighlightRegistry.delete returns true when trying to delete the remaining key');
assert_false(CSS.highlights.has(name1), 'HighlightRegistry.has returns false when it is called with the key inserted first and then deleted');
assert_false(CSS.highlights.has(name2), 'HighlightRegistry.has returns false when it is called with the key inserted second and then deleted');
assert_equals(CSS.highlights.get(name1), undefined, 'HighlightRegistry.get returns undefined when it is called with a key that was deleted');
assert_equals(CSS.highlights.get(name2), undefined, 'HighlightRegistry.get returns undefined when it is called with a key that was deleted');
assert_equals(CSS.highlights.size, 0, 'HighlightRegistry.size decreases in 1 after deleting an existing key.');
CSS.highlights.set(name1, h1);
CSS.highlights.set(name1, h2);
assert_equals(CSS.highlights.size, 1, 'HighlightRegistry.size keeps the same after an insertion of a Highlight with an existing name');
assert_equals(CSS.highlights.get(name1), h2, 'The Highlight inserted with the same name as an existing one was effectively inserted into the registry');
CSS.highlights.clear();
assert_equals(CSS.highlights.size, 0, 'HighlightRegistry.clear empties the map.');
CSS.highlights.clear();
assert_equals(CSS.highlights.size, 0, 'HighlightRegistry.clear called with an empty registry keeps it empty.');
CSS.highlights.set(name1, h1).set(name2, h2);
assert_equals(CSS.highlights.size, 2, 'HighlightRegistry.size is 2 after inserting two different Highlights by chaining the set method.');
}, 'HighlightRegistry has a maplike interface.');
</script>
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