1 files changed, 34 insertions, 0 deletions
diff --git a/remote/cdp/test/browser/browser_tabs.js b/remote/cdp/test/browser/browser_tabs.js
new file mode 100644
index 0000000000..353d94267e
--- /dev/null
+++ b/remote/cdp/test/browser/browser_tabs.js
@@ -0,0 +1,34 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test very basic CDP features.
+
+const TEST_URL = toDataURL("default-test-page");
+
+add_task(async function({ CDP }) {
+  // Use gBrowser.addTab instead of BrowserTestUtils as it creates the tab differently.
+  // It demonstrates a race around tab.linkedBrowser.browsingContext being undefined
+  // when accessing this property early.
+  const tab = gBrowser.addTab(TEST_URL, {
+    skipAnimation: true,
+    triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
+  });
+
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  let targets = await getTargets(CDP);
+  ok(
+    targets.some(target => target.url == TEST_URL),
+    "Found the tab in target list"
+  );
+
+  BrowserTestUtils.removeTab(tab);
+
+  targets = await getTargets(CDP);
+  ok(
+    !targets.some(target => target.url == TEST_URL),
+    "Tab has been removed from the target list"
+  );
+});