1 files changed, 39 insertions, 0 deletions
diff --git a/dom/tests/mochitest/dom-level0/file_separate_post_message_queue.html b/dom/tests/mochitest/dom-level0/file_separate_post_message_queue.html
new file mode 100644
index 0000000000..ce1494e3d2
--- /dev/null
+++ b/dom/tests/mochitest/dom-level0/file_separate_post_message_queue.html
@@ -0,0 +1,39 @@
+<script>
+
+let runnable1 = {
+  run() {
+    window.opener.callOrder.push("Runnable1");
+  }
+}
+
+let runnable2 = {
+  run() {
+    window.opener.callOrder.push("Runnable2");
+  }
+}
+
+let runnable3 = {
+  run() {
+    window.opener.callOrder.push("Runnable3");
+  }
+}
+
+window.onmessage = function () {
+  window.opener.callOrder.push("PostMessage");
+  if (window.loadCount == 1) {
+    window.loadCount += 1;
+    location.reload();
+  } else {
+    window.opener.onDone();
+  }
+};
+
+// Pushed to normal queue
+SpecialPowers.Services.tm.dispatchToMainThread(runnable1);
+// Pushed to idle queue
+window.postMessage("bar", "*");
+// Pushed to normal queue
+SpecialPowers.Services.tm.dispatchToMainThread(runnable2);
+// Pushed to normal queue
+SpecialPowers.Services.tm.dispatchToMainThread(runnable3);
+</script>