Bug 1968547: Add test to verify no error message event is fired when aria-invalid=false r=Jamie a=dmeehan

Differential Revision: https://phabricator.services.mozilla.com/D253399

accessible/tests/browser/mac/browser_aria_errormessage.js

@@ -266,3 +266,26 @@ addAccessibleTask(
     );
   }
 );
+
+/**
+ * This test modifies the innerText of an associated error message on an
+ * input with aria-invalid=false and verifies the error change event
+ * is NOT fired.
+ */
+addAccessibleTask(
+  `
+    <label for="input">Valid field with associated error error</label><input id="input" aria-invalid="false" aria-errormessage="error-msg">
+    <div id="error-msg">Field validation failed</div>
+  `,
+  async (browser, _accDoc) => {
+    // XXX: We don't have a way to await unexpected, non-core events, so we
+    // use the core EVENT_ERRORMESSAGE_CHANGED here as a proxy for AXValidationErrorChanged
+    const unexpectedEvents = { unexpected: [[EVENT_ERRORMESSAGE_CHANGED]] };
+    info("Setting new error message text");
+    await contentSpawnMutation(browser, unexpectedEvents, function () {
+      content.document.getElementById("error-msg").innerText =
+        "new error message";
+    });
+    ok(true, "Did not receive error message event!");
+  }
+);

accessible/tests/mochitest/events.js

@@ -16,6 +16,8 @@ const EVENT_DOCUMENT_LOAD_COMPLETE =
 const EVENT_DOCUMENT_RELOAD = nsIAccessibleEvent.EVENT_DOCUMENT_RELOAD;
 const EVENT_DOCUMENT_LOAD_STOPPED =
   nsIAccessibleEvent.EVENT_DOCUMENT_LOAD_STOPPED;
+const EVENT_ERRORMESSAGE_CHANGED =
+  nsIAccessibleEvent.EVENT_ERRORMESSAGE_CHANGED;
 const EVENT_HIDE = nsIAccessibleEvent.EVENT_HIDE;
 const EVENT_FOCUS = nsIAccessibleEvent.EVENT_FOCUS;
 const EVENT_NAME_CHANGE = nsIAccessibleEvent.EVENT_NAME_CHANGE;

accessible/tests/mochitest/promisified-events.js

@@ -15,7 +15,7 @@
             EVENT_DESCRIPTION_CHANGE, EVENT_NAME_CHANGE, EVENT_STATE_CHANGE,
             EVENT_VALUE_CHANGE, EVENT_TEXT_VALUE_CHANGE, EVENT_FOCUS,
             EVENT_DOCUMENT_RELOAD, EVENT_VIRTUALCURSOR_CHANGED, EVENT_ALERT,
-            EVENT_OBJECT_ATTRIBUTE_CHANGED, EVENT_MENUPOPUP_START, EVENT_MENUPOPUP_END,
+            EVENT_OBJECT_ATTRIBUTE_CHANGED, EVENT_MENUPOPUP_START, EVENT_MENUPOPUP_END, EVENT_ERRORMESSAGE_CHANGED,
             UnexpectedEvents, waitForEvent,
             waitForEvents, waitForOrderedEvents, waitForStateChange,
             stateChangeEventArgs */
@@ -55,6 +55,8 @@ const EVENT_OBJECT_ATTRIBUTE_CHANGED =
 const EVENT_INNER_REORDER = nsIAccessibleEvent.EVENT_INNER_REORDER;
 const EVENT_MENUPOPUP_START = nsIAccessibleEvent.EVENT_MENUPOPUP_START;
 const EVENT_MENUPOPUP_END = nsIAccessibleEvent.EVENT_MENUPOPUP_END;
+const EVENT_ERRORMESSAGE_CHANGED =
+  nsIAccessibleEvent.EVENT_ERRORMESSAGE_CHANGED;
 
 const EventsLogger = {
   enabled: false,