<!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>