test(ui): characterize guardrails monitor table

ui/litellm-dashboard/src/app/(dashboard)/guardrails-monitor/_components/GuardrailsOverview.test.tsx

@@ -0,0 +1,95 @@
+import { render, screen } from "@testing-library/react";
+import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
+import userEvent from "@testing-library/user-event";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import * as networking from "@/components/networking";
+import { GuardrailsOverview } from "./GuardrailsOverview";
+
+vi.mock("@/components/networking", () => ({
+  getGuardrailsUsageOverview: vi.fn(),
+}));
+
+vi.mock("./ScoreChart", () => ({
+  ScoreChart: () => <div>Score chart</div>,
+}));
+
+vi.mock("./EvaluationSettingsModal", () => ({
+  EvaluationSettingsModal: () => null,
+}));
+
+const mockGetGuardrailsUsageOverview = vi.mocked(networking.getGuardrailsUsageOverview);
+
+function wrapper({ children }: { children: React.ReactNode }) {
+  const queryClient = new QueryClient({
+    defaultOptions: {
+      queries: { retry: false },
+    },
+  });
+  return <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>;
+}
+
+describe("GuardrailsOverview", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockGetGuardrailsUsageOverview.mockResolvedValue({
+      rows: [
+        {
+          id: "guardrail-low",
+          name: "Low Failure Guardrail",
+          type: "content_filter",
+          provider: "LiteLLM",
+          requestsEvaluated: 1200,
+          failRate: 2.5,
+          avgLatency: 45,
+          status: "healthy",
+          trend: "down",
+        },
+        {
+          id: "guardrail-high",
+          name: "High Failure Guardrail",
+          type: "content_filter",
+          provider: "Bedrock",
+          requestsEvaluated: 300,
+          failRate: 18,
+          status: "warning",
+          trend: "up",
+        },
+      ],
+      chart: [],
+      totalRequests: 1500,
+      totalBlocked: 84,
+      passRate: 94.4,
+    });
+  });
+
+  it("renders performance data and selects a guardrail", async () => {
+    const onSelectGuardrail = vi.fn();
+    const user = userEvent.setup();
+
+    render(
+      <GuardrailsOverview
+        accessToken="test-token"
+        startDate="2026-08-01"
+        endDate="2026-08-12"
+        onSelectGuardrail={onSelectGuardrail}
+      />,
+      { wrapper },
+    );
+
+    expect(await screen.findByRole("columnheader", { name: "Guardrail" })).toBeInTheDocument();
+    expect(screen.getByRole("columnheader", { name: /Requests/ })).toBeInTheDocument();
+    expect(screen.getByRole("columnheader", { name: /Fail Rate/ })).toBeInTheDocument();
+    expect(await screen.findByText("Low Failure Guardrail")).toBeInTheDocument();
+    expect(screen.getByText("1,200")).toBeInTheDocument();
+    expect(screen.getByText("18%")).toBeInTheDocument();
+    expect(screen.getByText("45ms")).toBeInTheDocument();
+
+    const rows = screen.getAllByRole("row");
+    expect(rows[1]).toHaveTextContent("High Failure Guardrail");
+    expect(rows[2]).toHaveTextContent("Low Failure Guardrail");
+
+    await user.click(screen.getByRole("button", { name: "Low Failure Guardrail" }));
+
+    expect(onSelectGuardrail).toHaveBeenCalledWith("guardrail-low");
+  });
+});