From fe30c6ad87d6d7dd7ee26474ff5c52dda80df14d Mon Sep 17 00:00:00 2001
From: Masayuki Nakano <masayuki@d-toybox.com>
Date: Sun, 16 Feb 2020 14:54:11 +0000
Subject: [PATCH] Bug 1601532 - Make `test_bug1332876.html` synthesizes on
 `<span>` element in the `<iframe>` rather than on the `<iframe>` r=smaug

The timeout is caused by that `iframe.contentWindow` may not receive `click`
event (as far as I've tested, neither `mousedown` nor `mouseup` is fired in
that case) when synthesizing a mouse click over the `<iframe>` element with
parent window.  However, if it synthesizes mouse click with `<span>` element
in the `<iframe>` and `iframe.contentWindow`, `click` event is always fired.

Differential Revision: https://phabricator.services.mozilla.com/D62992

--HG--
extra : moz-landing-system : lando
---
 editor/libeditor/tests/test_bug1332876.html | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/editor/libeditor/tests/test_bug1332876.html b/editor/libeditor/tests/test_bug1332876.html
index 69a0c53cf323..1234b53f62f3 100644
--- a/editor/libeditor/tests/test_bug1332876.html
+++ b/editor/libeditor/tests/test_bug1332876.html
@@ -1,7 +1,7 @@
 <!DOCTYPE HTML>
 <html>
 <!--
-https://bugzilla.mozilla.org/show_bug.cgi?id=795418
+https://bugzilla.mozilla.org/show_bug.cgi?id=1332876
 -->
 <head>
   <meta charset="utf-8">
@@ -25,21 +25,29 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=795418
 /** Test for Bug 1332876 **/
 SimpleTest.waitForExplicitFinish();
 SimpleTest.waitForFocus(function() {
-  var iframe = document.querySelector("iframe");
+  let iframe = document.querySelector("iframe");
   iframe.contentDocument.designMode = "on";
 
   iframe.contentWindow.addEventListener("keypress", function() {
+    info("Hiding the iframe...");
     iframe.style.display = "none";
     document.body.offsetHeight;
     ok(true, "did not crash");
     SimpleTest.finish();
-  });
+  }, {once: true});
 
   iframe.contentWindow.addEventListener("click", function() {
-    synthesizeKey("a", {}, iframe.contentWindow);
-  });
+    info("Waiting keypress event...");
+    // Use another macro task for avoiding impossible event nesting.
+    SimpleTest.executeSoon(() => {
+      synthesizeKey("a", {}, iframe.contentWindow);
+    });
+  }, {once: true});
 
-  synthesizeMouse(iframe, 20, 20, {});
+  let span = iframe.contentDocument.querySelector("span");
+  ok(span != null, "The span element should've been loaded in the iframe");
+  info("Waiting click event to focus the iframe...");
+  synthesizeMouseAtCenter(span, {}, iframe.contentWindow);
 });
 
 </script>
