Bug 1287706 part 8 - Add web-platform-test for once option. r?smaug
MozReview-Commit-ID: t5f34n2taN
--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -36378,16 +36378,22 @@
}
],
"XMLHttpRequest/xmlhttprequest-sync-not-hang-scriptloader.html": [
{
"path": "XMLHttpRequest/xmlhttprequest-sync-not-hang-scriptloader.html",
"url": "/XMLHttpRequest/xmlhttprequest-sync-not-hang-scriptloader.html"
}
],
+ "dom/events/AddEventListenerOptions-once.html": [
+ {
+ "path": "dom/events/AddEventListenerOptions-once.html",
+ "url": "/dom/events/AddEventListenerOptions-once.html"
+ }
+ ],
"editing/run/justifycenter.html": [
{
"path": "editing/run/justifycenter.html",
"timeout": "long",
"url": "/editing/run/justifycenter.html"
}
],
"editing/run/multitest.html": [
new file mode 100644
--- /dev/null
+++ b/testing/web-platform/tests/dom/events/AddEventListenerOptions-once.html
@@ -0,0 +1,81 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>AddEventListenerOptions.once</title>
+<link rel="author" title="Xidorn Quan" href="https://www.upsuper.org">
+<link rel="help" href="https://dom.spec.whatwg.org/#dom-addeventlisteneroptions-once">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+
+test(function() {
+ var invoked_once = false;
+ var invoked_normal = false;
+ function handler_once() {
+ invoked_once = true;
+ }
+ function handler_normal() {
+ invoked_normal = true;
+ }
+
+ document.addEventListener('test', handler_once, {once: true});
+ document.addEventListener('test', handler_normal);
+ document.dispatchEvent(new Event('test'));
+ assert_equals(invoked_once, true, "Once handler should be invoked");
+ assert_equals(invoked_normal, true, "Normal handler should be invoked");
+
+ invoked_once = false;
+ invoked_normal = false;
+ document.dispatchEvent(new Event('test'));
+ assert_equals(invoked_once, false, "Once handler shouldn't be invoked again");
+ assert_equals(invoked_normal, true, "Normal handler should be invoked again");
+ document.removeEventListener('test', handler_normal);
+}, "Once listener should be invoked only once");
+
+test(function() {
+ var invoked_count = 0;
+ function handler() {
+ invoked_count++;
+ if (invoked_count == 1)
+ document.dispatchEvent(new Event('test'));
+ }
+ document.addEventListener('test', handler, {once: true});
+ document.dispatchEvent(new Event('test'));
+ assert_equals(invoked_count, 1, "Once handler should only be invoked once");
+
+ invoked_count = 0;
+ function handler2() {
+ invoked_count++;
+ if (invoked_count == 1)
+ document.addEventListener('test', handler2, {once: true});
+ if (invoked_count <= 2)
+ document.dispatchEvent(new Event('test'));
+ }
+ document.addEventListener('test', handler2, {once: true});
+ document.dispatchEvent(new Event('test'));
+ assert_equals(invoked_count, 2, "Once handler should only be invoked once after each adding");
+}, "Once listener should be invoked only once even if the event is nested");
+
+test(function() {
+ var invoked_count = 0;
+ function handler() {
+ invoked_count++;
+ }
+
+ document.addEventListener('test', handler, {once: true});
+ document.addEventListener('test', handler);
+ document.dispatchEvent(new Event('test'));
+ assert_equals(invoked_count, 1, "The handler should only be added once");
+
+ invoked_count = 0;
+ document.dispatchEvent(new Event('test'));
+ assert_equals(invoked_count, 0, "The handler was added as a once listener");
+
+ invoked_count = 0;
+ document.addEventListener('test', handler, {once: true});
+ document.removeEventListener('test', handler);
+ document.dispatchEvent(new Event('test'));
+ assert_equals(invoked_count, 0, "The handler should have been removed");
+}, "Once listener should be added / removed like normal listeners");
+
+</script>