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<!DOCTYPE html>
<body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
class MyControl extends HTMLElement {
static get formAssociated() { return true; }
constructor() {
super();
this.resetCalled_ = false;
}
formResetCallback() {
this.resetCalled_ = true;
}
get resetCalled() { return this.resetCalled_; }
}
customElements.define('my-control', MyControl);
test(() => {
document.body.insertAdjacentHTML('beforeend',
'<form><my-control></my-control></form>');
let form = document.body.lastChild;
let custom = form.firstChild;
form.reset();
assert_true(custom.resetCalled);
}, 'form.reset() should trigger formResetCallback');
test(() => {
document.body.insertAdjacentHTML('beforeend',
'<form><my-control></my-control><output>default</output></form>');
let form = document.body.lastChild;
let custom = form.firstChild;
let output = form.lastChild;
output.value = 'updated';
output.addEventListener('DOMSubtreeModified', () => {
assert_false(custom.resetCalled, 'formResetCallback should not be ' +
'called before built-in control\'s reset');
});
form.reset();
assert_true(custom.resetCalled);
}, 'form.reset(): formResetCallback is called after reset of the last ' +
'built-in form control and before the next statement.');
promise_test(() => {
document.body.insertAdjacentHTML('beforeend',
'<form><my-control></my-control><input type=reset></form>');
let form = document.body.lastChild;
let custom = form.firstChild;
let resetButton = form.lastChild;
assert_false(custom.resetCalled);
resetButton.click();
assert_false(custom.resetCalled);
return Promise.resolve().then(() => assert_true(custom.resetCalled));
}, 'Clicking a reset button invokes formResetCallback in a microtask');
</script>
</body>
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