Chore: homepage tests (#6278)

src/widgets/adguard/component.test.jsx

@@ -0,0 +1,63 @@
+// @vitest-environment jsdom
+
+import { screen } from "@testing-library/react";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import { renderWithProviders } from "test-utils/render-with-providers";
+
+const { useWidgetAPI } = vi.hoisted(() => ({ useWidgetAPI: vi.fn() }));
+
+vi.mock("utils/proxy/use-widget-api", () => ({
+  default: useWidgetAPI,
+}));
+
+import Component from "./component";
+
+describe("widgets/adguard/component", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("renders placeholders while loading", () => {
+    useWidgetAPI.mockReturnValue({ data: undefined, error: undefined });
+
+    const { container } = renderWithProviders(<Component service={{ widget: { type: "adguard" } }} />, {
+      settings: { hideErrors: false },
+    });
+
+    expect(container.querySelectorAll(".service-block")).toHaveLength(4);
+    expect(screen.getByText("adguard.queries")).toBeInTheDocument();
+    expect(screen.getByText("adguard.blocked")).toBeInTheDocument();
+    expect(screen.getByText("adguard.filtered")).toBeInTheDocument();
+    expect(screen.getByText("adguard.latency")).toBeInTheDocument();
+  });
+
+  it("renders error UI when widget API errors", () => {
+    useWidgetAPI.mockReturnValue({ data: undefined, error: { message: "nope" } });
+
+    renderWithProviders(<Component service={{ widget: { type: "adguard" } }} />, { settings: { hideErrors: false } });
+
+    expect(screen.getAllByText(/widget\.api_error/i).length).toBeGreaterThan(0);
+  });
+
+  it("renders computed filtered and latency values", () => {
+    useWidgetAPI.mockReturnValue({
+      data: {
+        num_dns_queries: 100,
+        num_blocked_filtering: 20,
+        num_replaced_safebrowsing: 1,
+        num_replaced_safesearch: 2,
+        num_replaced_parental: 3,
+        avg_processing_time: 0.01,
+      },
+      error: undefined,
+    });
+
+    renderWithProviders(<Component service={{ widget: { type: "adguard" } }} />, { settings: { hideErrors: false } });
+
+    expect(screen.getByText("100")).toBeInTheDocument();
+    expect(screen.getByText("20")).toBeInTheDocument();
+    expect(screen.getByText("6")).toBeInTheDocument(); // filtered sum
+    expect(screen.getByText("10")).toBeInTheDocument(); // 0.01s -> 10ms
+  });
+});