1 files changed, 46 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/datetime/browser_datetime_change_event.js b/toolkit/content/tests/browser/datetime/browser_datetime_change_event.js
new file mode 100644
index 0000000000..920653778a
--- /dev/null
+++ b/toolkit/content/tests/browser/datetime/browser_datetime_change_event.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function open_change_and_expect_one_change_event(page) {
+  await helper.openPicker(page);
+
+  let changeEventPromise = helper.promiseChange();
+
+  // Click the first item (top-left corner) of the calendar
+  helper.click(helper.getElement(DAYS_VIEW).children[0]);
+  await changeEventPromise;
+
+  await helper.closePicker();
+
+  let changeEvents = await SpecialPowers.spawn(
+    gBrowser.selectedBrowser,
+    [],
+    function () {
+      return content.wrappedJSObject.changeEventCount;
+    }
+  );
+  is(changeEvents, 1, "Should've got one change event");
+  await helper.tearDown();
+}
+
+add_task(async function test_change_event_simple() {
+  await open_change_and_expect_one_change_event(`data:text/html,
+    <!doctype html>
+    <script>
+      var changeEventCount = 0;
+    </script>
+    <input type="date" id="date" onchange="changeEventCount++">
+  `);
+});
+
+add_task(async function test_change_event_with_mutation() {
+  await open_change_and_expect_one_change_event(`data:text/html,
+    <!doctype html>
+    <script>
+      var changeEventCount = 0;
+    </script>
+    <input type="date" id="date" onchange="this.value = ''; changeEventCount++">
+  `);
+});