From a15fb63a6e3054239e97fb7d0effdf9b88ae5dc4 Mon Sep 17 00:00:00 2001
From: johnjheejin <john.j@tmcwork.com>
Date: Sat, 29 Aug 2026 10:44:28 +0900
Subject: [PATCH] test(web): cover target selector persistence

---
 .../src/__tests__/useClientSettings.test.tsx  | 22 ++++++++++
 .../web/src/__tests__/useStepsStream.test.tsx | 43 +++++++++++++++++++
 2 files changed, 65 insertions(+)
 create mode 100644 packages/web/src/__tests__/useClientSettings.test.tsx

diff --git a/packages/web/src/__tests__/useClientSettings.test.tsx b/packages/web/src/__tests__/useClientSettings.test.tsx
new file mode 100644
index 0000000..a7a8d17
--- /dev/null
+++ b/packages/web/src/__tests__/useClientSettings.test.tsx
@@ -0,0 +1,22 @@
+import { act, renderHook } from "@testing-library/react";
+import { afterEach, describe, expect, it } from "vitest";
+import { useClientSettings } from "../hooks/useClientSettings";
+
+describe("useClientSettings", () => {
+  afterEach(() => {
+    localStorage.clear();
+  });
+
+  it("restores the selected target engine after a reload", () => {
+    const first = renderHook(() => useClientSettings());
+
+    act(() => {
+      first.result.current.updateSettings({ targetApp: "antigravity-ide" });
+    });
+    first.unmount();
+
+    const reloaded = renderHook(() => useClientSettings());
+
+    expect(reloaded.result.current.settings.targetApp).toBe("antigravity-ide");
+  });
+});
diff --git a/packages/web/src/__tests__/useStepsStream.test.tsx b/packages/web/src/__tests__/useStepsStream.test.tsx
index 870dc52..deec489 100644
--- a/packages/web/src/__tests__/useStepsStream.test.tsx
+++ b/packages/web/src/__tests__/useStepsStream.test.tsx
@@ -166,4 +166,47 @@ describe("useStepsStream", () => {
       "/api/conversations/cascade-1/ws?targetApp=antigravity-ide",
     );
   });
+
+  it("keeps the selected engine when reconnecting on resume", async () => {
+    vi.spyOn(api, "getSteps").mockResolvedValue({ steps: [], offset: 0 });
+
+    renderHook(() =>
+      useStepsStream(
+        "cascade-1",
+        0,
+        undefined,
+        false,
+        false,
+        "antigravity-ide",
+      ),
+    );
+
+    await waitFor(() => {
+      expect(MockWebSocket.instances).toHaveLength(1);
+    });
+
+    act(() => {
+      Object.defineProperty(document, "hidden", {
+        configurable: true,
+        value: true,
+      });
+      document.dispatchEvent(new Event("visibilitychange"));
+    });
+
+    act(() => {
+      Object.defineProperty(document, "hidden", {
+        configurable: true,
+        value: false,
+      });
+      document.dispatchEvent(new Event("visibilitychange"));
+    });
+
+    await waitFor(() => {
+      expect(MockWebSocket.instances).toHaveLength(2);
+    });
+
+    expect(MockWebSocket.instances[1].url).toContain(
+      "/api/conversations/cascade-1/ws?targetApp=antigravity-ide",
+    );
+  });
 });