1 files changed, 65 insertions, 0 deletions
diff --git a/devtools/server/tests/xpcshell/test_objectgrips-07.js b/devtools/server/tests/xpcshell/test_objectgrips-07.js
new file mode 100644
index 0000000000..2a3a0bf00e
--- /dev/null
+++ b/devtools/server/tests/xpcshell/test_objectgrips-07.js
@@ -0,0 +1,65 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+/**
+ * This test checks that objects which are not extensible report themselves as
+ * such.
+ */
+
+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 [f, s, ne, e] = packet.frame.arguments;
+    const [fClient, sClient, neClient, eClient] = packet.frame.arguments.map(
+      a => threadFront.pauseGrip(a)
+    );
+
+    Assert.ok(!f.extensible);
+    Assert.ok(!fClient.isExtensible);
+
+    Assert.ok(!s.extensible);
+    Assert.ok(!sClient.isExtensible);
+
+    Assert.ok(!ne.extensible);
+    Assert.ok(!neClient.isExtensible);
+
+    Assert.ok(e.extensible);
+    Assert.ok(eClient.isExtensible);
+
+    await threadFront.resume();
+  })
+);
+
+function evalCode(debuggee) {
+  debuggee.eval(
+    function stopMe(arg1) {
+      debugger;
+    }.toString()
+  );
+  /* eslint-disable no-undef */
+  debuggee.eval(
+    "(" +
+      function () {
+        const f = {};
+        Object.freeze(f);
+        const s = {};
+        Object.seal(s);
+        const ne = {};
+        Object.preventExtensions(ne);
+        stopMe(f, s, ne, {});
+      } +
+      "())"
+  );
+  /* eslint-enable no-undef */
+}