1 files changed, 47 insertions, 0 deletions
diff --git a/dom/events/test/test_hover_mouseleave.html b/dom/events/test/test_hover_mouseleave.html
new file mode 100644
index 0000000000..aac25f5b51
--- /dev/null
+++ b/dom/events/test/test_hover_mouseleave.html
@@ -0,0 +1,47 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Test :hover state on mouseleave.</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<script src="/tests/SimpleTest/EventUtils.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+<style>
+div {
+  width: 100px;
+  height: 100px;
+}
+</style>
+<div id="target" style="background: green;"></div>
+<div id="outside" style="background: blue;"></div>
+<script>
+SimpleTest.waitForExplicitFinish();
+let mouseLeaveCount = 0;
+let mouseOutCount = 0;
+
+target.addEventListener("mouseleave", () => {
+  if (mouseLeaveCount++ != 0)
+    return;
+  is(target.matches(":hover"), false,
+     "Should've been not hovered on mouseleave");
+  is(outside.matches(":hover"), true,
+     "New target should be hovered on mouseleave");
+  if (mouseOutCount)
+    SimpleTest.finish();
+});
+
+target.addEventListener("mouseout", () => {
+  if (mouseOutCount++ != 0)
+    return;
+  is(target.matches(":hover"), false,
+     "Should've been not hovered on mouseleave");
+  is(outside.matches(":hover"), true,
+     "New target should be hovered on mouseleave");
+  if (mouseLeaveCount)
+    SimpleTest.finish();
+});
+
+SimpleTest.waitForFocus(() => {
+  synthesizeMouseAtCenter(outside, { type: "mousemove" });
+  synthesizeMouseAtCenter(target, { type: "mousemove" });
+  synthesizeMouseAtCenter(outside, { type: "mousemove" });
+});
+</script>