1 files changed, 52 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_objectgrips-nested-proxy.js b/devtools/server/tests/xpcshell/test_objectgrips-nested-proxy.js
new file mode 100644
index 0000000000..f8435e5c90
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_objectgrips-nested-proxy.js
@@ -0,0 +1,52 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* eslint-disable no-shadow, max-nested-callbacks */
+
+"use strict";
+
+Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true);
+registerCleanupFunction(() => {
+  Services.prefs.clearUserPref("security.allow_eval_with_system_principal");
+});
+
+add_task(
+  threadFrontTest(async ({ threadFront, debuggee }) => {
+    const packet = await executeOnNextTickAndWaitForPause(
+      () => evalCode(debuggee),
+      threadFront
+    );
+
+    const [grip] = packet.frame.arguments;
+    const objClient = threadFront.pauseGrip(grip);
+    const { proxyTarget, proxyHandler } = await objClient.getProxySlots();
+
+    strictEqual(grip.class, "Proxy", "Its a proxy grip.");
+    strictEqual(
+      proxyTarget.getGrip().class,
+      "Proxy",
+      "The target is also a proxy."
+    );
+    strictEqual(
+      proxyHandler.getGrip().class,
+      "Proxy",
+      "The handler is also a proxy."
+    );
+
+    await threadFront.resume();
+  })
+);
+
+function evalCode(debuggee) {
+  debuggee.eval(
+    function stopMe(arg) {
+      debugger;
+    }.toString()
+  );
+
+  debuggee.eval(`
+    var proxy = new Proxy({}, {});
+    for (let i = 0; i < 1e5; ++i)
+      proxy = new Proxy(proxy, proxy);
+    stopMe(proxy);
+  `);
+}