Event-defaultPrevented.html

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This WPT test may be referenced by the following Test IDs:
- /dom/events/Event-defaultPrevented.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Event.defaultPrevented</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="log"></div>

<script>

var ev;

test(function() {

  ev = document.createEvent("Event");

  assert_equals(ev.defaultPrevented, false, "defaultPrevented");

}, "When an event is created, defaultPrevented should be initialized to false.");

test(function() {

  ev.initEvent("foo", true, false);

  assert_equals(ev.bubbles, true, "bubbles");

  assert_equals(ev.cancelable, false, "cancelable");

  assert_equals(ev.defaultPrevented, false, "defaultPrevented");

}, "initEvent should work correctly (not cancelable).");

test(function() {

  assert_equals(ev.cancelable, false, "cancelable (before)");

  ev.preventDefault();

  assert_equals(ev.cancelable, false, "cancelable (after)");

  assert_equals(ev.defaultPrevented, false, "defaultPrevented");

}, "preventDefault() should not change defaultPrevented if cancelable is false.");

test(function() {

  assert_equals(ev.cancelable, false, "cancelable (before)");

  ev.returnValue = false;

  assert_equals(ev.cancelable, false, "cancelable (after)");

  assert_equals(ev.defaultPrevented, false, "defaultPrevented");

}, "returnValue should not change defaultPrevented if cancelable is false.");

test(function() {

  ev.initEvent("foo", true, true);

  assert_equals(ev.bubbles, true, "bubbles");

  assert_equals(ev.cancelable, true, "cancelable");

  assert_equals(ev.defaultPrevented, false, "defaultPrevented");

}, "initEvent should work correctly (cancelable).");

test(function() {

  assert_equals(ev.cancelable, true, "cancelable (before)");

  ev.preventDefault();

  assert_equals(ev.cancelable, true, "cancelable (after)");

  assert_equals(ev.defaultPrevented, true, "defaultPrevented");

}, "preventDefault() should change defaultPrevented if cancelable is true.");

test(function() {

  ev.initEvent("foo", true, true);

  assert_equals(ev.cancelable, true, "cancelable (before)");

  ev.returnValue = false;

  assert_equals(ev.cancelable, true, "cancelable (after)");

  assert_equals(ev.defaultPrevented, true, "defaultPrevented");

}, "returnValue should change defaultPrevented if cancelable is true.");

test(function() {

  ev.initEvent("foo", true, true);

  assert_equals(ev.bubbles, true, "bubbles");

  assert_equals(ev.cancelable, true, "cancelable");

  assert_equals(ev.defaultPrevented, false, "defaultPrevented");

}, "initEvent should unset defaultPrevented.");

</script>