1 files changed, 41 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-remember-expanded-scopes.js b/devtools/client/debugger/test/mochitest/browser_dbg-remember-expanded-scopes.js
new file mode 100644
index 0000000000..9d1a993b83
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-remember-expanded-scopes.js
@@ -0,0 +1,41 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+"use strict";
+
+// Ignore strange errors when shutting down.
+PromiseTestUtils.allowMatchingRejectionsGlobally(/No such actor/);
+PromiseTestUtils.allowMatchingRejectionsGlobally(/connection just closed/);
+
+const MAXIMUM_ITEMS = 10;
+
+// Test that expanded scopes stay expanded after resuming and pausing again.
+add_task(async function () {
+  const dbg = await initDebugger("doc-remember-expanded-scopes.html");
+  invokeInTab("main", "doc-remember-expanded-scopes.html");
+  await waitForPaused(dbg);
+
+  await toggleNode(dbg, "object");
+  await toggleNode(dbg, "innerObject");
+  await stepOver(dbg);
+  await waitForPaused(dbg);
+
+  await waitUntil(() => findNode(dbg, "innerData"));
+  ok(true, "Inner object data automatically expanded after stepping");
+});
+
+function findNode(dbg, text) {
+  for (let index = 0; index < MAXIMUM_ITEMS; index++) {
+    const elem = findElement(dbg, "scopeNode", index);
+    if (elem?.innerText == text) {
+      return elem;
+    }
+  }
+  return null;
+}
+
+async function toggleNode(dbg, text) {
+  const node = await waitFor(() => findNode(dbg, text));
+  return toggleObjectInspectorNode(node);
+}