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<!DOCTYPE html>
<meta charset="utf-8">
<title>Test selectionchange event fired on Text Control element</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<input id="input" type="text" value="hello">
<script>
const element = document.querySelector("input");
const events_on_document = [];
document.addEventListener("selectionchange", ev => {
events_on_document.push(ev);
});
const events_on_input = [];
element.addEventListener("selectionchange", ev => {
events_on_input.push(ev);
});
promise_test(async () => {
element.focus();
element.setSelectionRange(5, 5);
await new Promise(resolve => step_timeout(resolve, 500));
events_on_document.length = 0;
events_on_input.length = 0;
assert_equals(element.selectionStart, 5, "selectionStart before pressing backspace key");
assert_equals(element.selectionEnd, 5, "selectionEnd before pressing backspace key");
await new test_driver.send_keys(element, "\uE003");
assert_equals(element.selectionStart, 4, "selectionStart after pressing backspace key");
assert_equals(element.selectionEnd, 4, "selectionEnd after pressing backspace key");
// Waits a short time to allow any events to be processed.
await new Promise(resolve => step_timeout(resolve, 500));
assert_equals(events_on_input.length, 1);
//selectionchange event fired on a text control should bubble to the document
assert_equals(events_on_document[0].target, element, "Event target should be the input element");
assert_equals(events_on_document.length, 1);
}, "selectionchange event fired on an input element");
</script>
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