test(frontend/copilot): add CopilotPage banner coverage for sessionDryRun

Adds integration tests that verify the test-mode banner renders only
when both sessionId and sessionDryRun are truthy, covering the new
conditional introduced in the PR to prevent stale-preference banners.

autogpt_platform/frontend/src/app/(platform)/copilot/__tests__/CopilotPage.test.tsx

@@ -0,0 +1,168 @@
+import { render, screen, cleanup } from "@/tests/integrations/test-utils";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { CopilotPage } from "../CopilotPage";
+
+// Mock child components that are complex and not under test here
+vi.mock("../components/ChatContainer/ChatContainer", () => ({
+  ChatContainer: () => <div data-testid="chat-container" />,
+}));
+vi.mock("../components/ChatSidebar/ChatSidebar", () => ({
+  ChatSidebar: () => <div data-testid="chat-sidebar" />,
+}));
+vi.mock("../components/DeleteChatDialog/DeleteChatDialog", () => ({
+  DeleteChatDialog: () => null,
+}));
+vi.mock("../components/MobileDrawer/MobileDrawer", () => ({
+  MobileDrawer: () => null,
+}));
+vi.mock("../components/MobileHeader/MobileHeader", () => ({
+  MobileHeader: () => null,
+}));
+vi.mock("../components/NotificationBanner/NotificationBanner", () => ({
+  NotificationBanner: () => null,
+}));
+vi.mock("../components/NotificationDialog/NotificationDialog", () => ({
+  NotificationDialog: () => null,
+}));
+vi.mock("../components/RateLimitResetDialog/RateLimitResetDialog", () => ({
+  RateLimitResetDialog: () => null,
+}));
+vi.mock("../components/ScaleLoader/ScaleLoader", () => ({
+  ScaleLoader: () => <div data-testid="scale-loader" />,
+}));
+vi.mock("../components/ArtifactPanel/ArtifactPanel", () => ({
+  ArtifactPanel: () => null,
+}));
+vi.mock("@/components/ui/sidebar", () => ({
+  SidebarProvider: ({ children }: { children: React.ReactNode }) => (
+    <div>{children}</div>
+  ),
+}));
+
+// Mock hooks that hit the network
+vi.mock("@/app/api/__generated__/endpoints/chat/chat", () => ({
+  useGetV2GetCopilotUsage: () => ({
+    data: undefined,
+    isSuccess: false,
+    isError: false,
+  }),
+}));
+vi.mock("@/hooks/useCredits", () => ({
+  default: () => ({ credits: null, fetchCredits: vi.fn() }),
+}));
+vi.mock("@/services/feature-flags/use-get-flag", () => ({
+  Flag: {
+    ENABLE_PLATFORM_PAYMENT: "ENABLE_PLATFORM_PAYMENT",
+    ARTIFACTS: "ARTIFACTS",
+    CHAT_MODE_OPTION: "CHAT_MODE_OPTION",
+  },
+  useGetFlag: () => false,
+}));
+
+// Build the base mock return value for useCopilotPage
+const basePageState = {
+  sessionId: null as string | null,
+  messages: [],
+  status: "ready" as const,
+  error: undefined,
+  stop: vi.fn(),
+  isReconnecting: false,
+  isSyncing: false,
+  createSession: vi.fn(),
+  onSend: vi.fn(),
+  isLoadingSession: false,
+  isSessionError: false,
+  isCreatingSession: false,
+  isUploadingFiles: false,
+  isUserLoading: false,
+  isLoggedIn: true,
+  hasMoreMessages: false,
+  isLoadingMore: false,
+  loadMore: vi.fn(),
+  isMobile: false,
+  isDrawerOpen: false,
+  sessions: [],
+  isLoadingSessions: false,
+  handleOpenDrawer: vi.fn(),
+  handleCloseDrawer: vi.fn(),
+  handleDrawerOpenChange: vi.fn(),
+  handleSelectSession: vi.fn(),
+  handleNewChat: vi.fn(),
+  sessionToDelete: null,
+  isDeleting: false,
+  handleConfirmDelete: vi.fn(),
+  handleCancelDelete: vi.fn(),
+  historicalDurations: {},
+  rateLimitMessage: null,
+  dismissRateLimit: vi.fn(),
+  isDryRun: false,
+  sessionDryRun: false,
+};
+
+const mockUseCopilotPage = vi.fn(() => basePageState);
+
+vi.mock("../useCopilotPage", () => ({
+  useCopilotPage: () => mockUseCopilotPage(),
+}));
+
+afterEach(() => {
+  cleanup();
+  mockUseCopilotPage.mockReset();
+  mockUseCopilotPage.mockImplementation(() => basePageState);
+});
+
+describe("CopilotPage test-mode banner", () => {
+  it("does not show test-mode banner when there is no active session", () => {
+    render(<CopilotPage />);
+    expect(
+      screen.queryByText(/test mode.*this session runs agents/i),
+    ).toBeNull();
+  });
+
+  it("does not show test-mode banner when session exists but sessionDryRun is false", () => {
+    mockUseCopilotPage.mockReturnValue({
+      ...basePageState,
+      sessionId: "session-abc",
+      sessionDryRun: false,
+    });
+    render(<CopilotPage />);
+    expect(
+      screen.queryByText(/test mode.*this session runs agents/i),
+    ).toBeNull();
+  });
+
+  it("shows test-mode banner when session exists and sessionDryRun is true", () => {
+    mockUseCopilotPage.mockReturnValue({
+      ...basePageState,
+      sessionId: "session-abc",
+      sessionDryRun: true,
+    });
+    render(<CopilotPage />);
+    expect(
+      screen.getByText(/test mode.*this session runs agents/i),
+    ).toBeDefined();
+  });
+
+  it("does not show test-mode banner when sessionDryRun is true but no sessionId", () => {
+    mockUseCopilotPage.mockReturnValue({
+      ...basePageState,
+      sessionId: null,
+      sessionDryRun: true,
+    });
+    render(<CopilotPage />);
+    expect(
+      screen.queryByText(/test mode.*this session runs agents/i),
+    ).toBeNull();
+  });
+
+  it("shows loading spinner when user is loading", () => {
+    mockUseCopilotPage.mockReturnValue({
+      ...basePageState,
+      isUserLoading: true,
+      isLoggedIn: false,
+    });
+    render(<CopilotPage />);
+    expect(screen.getByTestId("scale-loader")).toBeDefined();
+    expect(screen.queryByTestId("chat-container")).toBeNull();
+  });
+});