1 files changed, 46 insertions, 0 deletions
diff --git a/devtools/client/webconsole/test/browser/browser_webconsole_observer_notifications.js b/devtools/client/webconsole/test/browser/browser_webconsole_observer_notifications.js
new file mode 100644
index 0000000000..3ca44337a2
--- /dev/null
+++ b/devtools/client/webconsole/test/browser/browser_webconsole_observer_notifications.js
@@ -0,0 +1,46 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_URI =
+  "data:text/html;charset=utf-8,<!DOCTYPE html><p>Web Console test for " +
+  "observer notifications";
+
+let created = false;
+let destroyed = false;
+
+add_task(async function () {
+  setupObserver();
+  await openNewTabAndConsole(TEST_URI);
+  await waitFor(() => created);
+
+  await closeTabAndToolbox(gBrowser.selectedTab);
+  await waitFor(() => destroyed);
+
+  ok(true, "We received both created and destroyed events");
+});
+
+function setupObserver() {
+  const observer = {
+    QueryInterface: ChromeUtils.generateQI(["nsIObserver"]),
+
+    observe: function observe(subject, topic) {
+      subject = subject.QueryInterface(Ci.nsISupportsString);
+
+      switch (topic) {
+        case "web-console-created":
+          Services.obs.removeObserver(observer, "web-console-created");
+          created = true;
+          break;
+        case "web-console-destroyed":
+          Services.obs.removeObserver(observer, "web-console-destroyed");
+          destroyed = true;
+          break;
+      }
+    },
+  };
+
+  Services.obs.addObserver(observer, "web-console-created");
+  Services.obs.addObserver(observer, "web-console-destroyed");
+}