1 files changed, 56 insertions, 0 deletions
diff --git a/layout/xul/test/browser_bug703210.js b/layout/xul/test/browser_bug703210.js
new file mode 100644
index 0000000000..5026875310
--- /dev/null
+++ b/layout/xul/test/browser_bug703210.js
@@ -0,0 +1,56 @@
+add_task(async function () {
+  const url =
+    "data:text/html," +
+    "<html onmousemove='event.stopPropagation()'" +
+    " onmouseenter='event.stopPropagation()' onmouseleave='event.stopPropagation()'" +
+    " onmouseover='event.stopPropagation()' onmouseout='event.stopPropagation()'>" +
+    '<p id="p1" title="tooltip is here">This paragraph has a tooltip.</p>' +
+    '<p id="p2">This paragraph doesn\'t have tooltip.</p></html>';
+
+  let tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, url);
+  let browser = gBrowser.selectedBrowser;
+
+  await new Promise(resolve => {
+    SpecialPowers.pushPrefEnv({ set: [["ui.tooltipDelay", 0]] }, resolve);
+  });
+
+  let popupShownPromise = BrowserTestUtils.waitForEvent(
+    document,
+    "popupshown",
+    false,
+    event => {
+      is(event.originalTarget.localName, "tooltip", "tooltip is showing");
+      return true;
+    }
+  );
+  let popupHiddenPromise = BrowserTestUtils.waitForEvent(
+    document,
+    "popuphidden",
+    false,
+    event => {
+      is(event.originalTarget.localName, "tooltip", "tooltip is hidden");
+      return true;
+    }
+  );
+
+  // Send a mousemove at a known position to start the test.
+  await BrowserTestUtils.synthesizeMouseAtCenter(
+    "#p2",
+    { type: "mousemove" },
+    browser
+  );
+  await BrowserTestUtils.synthesizeMouseAtCenter(
+    "#p1",
+    { type: "mousemove" },
+    browser
+  );
+  await popupShownPromise;
+  await BrowserTestUtils.synthesizeMouseAtCenter(
+    "#p2",
+    { type: "mousemove" },
+    browser
+  );
+  await popupHiddenPromise;
+
+  gBrowser.removeCurrentTab();
+});