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<!DOCTYPE html>
<html>
<head>
<title>Custom Elements: CEReactions on DOMStringMap interface</title>
<meta name="author" title="Ryosuke Niwa" href="mailto:rniwa@webkit.org">
<meta name="assert" content="setter and deleter of DOMStringMap interface must have CEReactions">
<meta name="help" content="https://html.spec.whatwg.org/#domstringmap">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/custom-elements-helpers.js"></script>
<script src="./resources/reactions.js"></script>
</head>
<body>
<div id="log"></div>
<script>
test(function () {
var element = define_new_custom_element(['data-foo']);
var instance = document.createElement(element.name);
assert_array_equals(element.takeLog().types(), ['constructed']);
instance.dataset.foo = 'bar';
var logEntries = element.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'data-foo', oldValue: null, newValue: 'bar', namespace: null});
}, 'setter on DOMStringMap must enqueue an attributeChanged reaction when adding an observed data attribute');
test(function () {
var element = define_new_custom_element(['data-bar']);
var instance = document.createElement(element.name);
assert_array_equals(element.takeLog().types(), ['constructed']);
instance.dataset.foo = 'bar';
assert_array_equals(element.takeLog().types(), []);
}, 'setter on DOMStringMap must not enqueue an attributeChanged reaction when adding an unobserved data attribute');
test(function () {
var element = define_new_custom_element(['data-foo']);
var instance = document.createElement(element.name);
instance.dataset.foo = 'bar';
assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
instance.dataset.foo = 'baz';
var logEntries = element.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'data-foo', oldValue: 'bar', newValue: 'baz', namespace: null});
}, 'setter on DOMStringMap must enqueue an attributeChanged reaction when mutating the value of an observed data attribute');
test(function () {
var element = define_new_custom_element(['data-foo']);
var instance = document.createElement(element.name);
instance.dataset.foo = 'bar';
assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
instance.dataset.foo = 'bar';
var logEntries = element.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'data-foo', oldValue: 'bar', newValue: 'bar', namespace: null});
}, 'setter on DOMStringMap must enqueue an attributeChanged reaction when mutating the value of an observed data attribute to the same value');
test(function () {
var element = define_new_custom_element(['data-zero']);
var instance = document.createElement(element.name);
instance.dataset.foo = 'bar';
assert_array_equals(element.takeLog().types(), ['constructed']);
instance.dataset.foo = 'baz';
assert_array_equals(element.takeLog().types(), []);
}, 'setter on DOMStringMap must not enqueue an attributeChanged reaction when mutating the value of an unobserved data attribute');
test(function () {
var element = define_new_custom_element(['data-foo']);
var instance = document.createElement(element.name);
instance.dataset.foo = 'bar';
assert_array_equals(element.takeLog().types(), ['constructed', 'attributeChanged']);
delete instance.dataset.foo;
var logEntries = element.takeLog();
assert_array_equals(logEntries.types(), ['attributeChanged']);
assert_attribute_log_entry(logEntries.last(), {name: 'data-foo', oldValue: 'bar', newValue: null, namespace: null});
}, 'deleter on DOMStringMap must enqueue an attributeChanged reaction when removing an observed data attribute');
test(function () {
var element = define_new_custom_element(['data-bar']);
var instance = document.createElement(element.name);
instance.dataset.foo = 'bar';
assert_array_equals(element.takeLog().types(), ['constructed']);
delete instance.dataset.foo;
assert_array_equals(element.takeLog().types(), []);
}, 'deleter on DOMStringMap must not enqueue an attributeChanged reaction when removing an unobserved data attribute');
test(function () {
var element = define_new_custom_element(['data-foo']);
var instance = document.createElement(element.name);
assert_array_equals(element.takeLog().types(), ['constructed']);
delete instance.dataset.foo;
assert_array_equals(element.takeLog().types(), []);
}, 'deleter on DOMStringMap must not enqueue an attributeChanged reaction when it does not remove a data attribute');
</script>
</body>
</html>
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