Add widget component tests (scrutiny..tailscale)

src/widgets/tailscale/component.test.jsx

@@ -0,0 +1,63 @@
+// @vitest-environment jsdom
+
+import { screen } from "@testing-library/react";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+import { renderWithProviders } from "test-utils/render-with-providers";
+import { findServiceBlockByLabel } from "test-utils/widget-assertions";
+
+const { useWidgetAPI } = vi.hoisted(() => ({ useWidgetAPI: vi.fn() }));
+vi.mock("utils/proxy/use-widget-api", () => ({ default: useWidgetAPI }));
+
+import Component from "./component";
+
+function expectBlockValue(container, label, value) {
+  const block = findServiceBlockByLabel(container, label);
+  expect(block, `missing block for ${label}`).toBeTruthy();
+  expect(block.textContent).toContain(String(value));
+}
+
+describe("widgets/tailscale/component", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date("2020-01-01T00:00:00Z"));
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("renders placeholders while loading", () => {
+    useWidgetAPI.mockReturnValue({ data: undefined, error: undefined });
+
+    const { container } = renderWithProviders(<Component service={{ widget: { type: "tailscale" } }} />, {
+      settings: { hideErrors: false },
+    });
+
+    expect(container.querySelectorAll(".service-block")).toHaveLength(3);
+    expect(screen.getByText("tailscale.address")).toBeInTheDocument();
+    expect(screen.getByText("tailscale.last_seen")).toBeInTheDocument();
+    expect(screen.getByText("tailscale.expires")).toBeInTheDocument();
+  });
+
+  it("renders address and expiry/last-seen strings when loaded", () => {
+    useWidgetAPI.mockReturnValue({
+      data: {
+        addresses: ["100.64.0.1"],
+        keyExpiryDisabled: true,
+        lastSeen: "2019-12-31T23:00:00Z",
+        expires: "2021-01-01T00:00:00Z",
+      },
+      error: undefined,
+    });
+
+    const { container } = renderWithProviders(<Component service={{ widget: { type: "tailscale" } }} />, {
+      settings: { hideErrors: false },
+    });
+
+    expectBlockValue(container, "tailscale.address", "100.64.0.1");
+    expect(findServiceBlockByLabel(container, "tailscale.last_seen")?.textContent).toContain("tailscale.ago");
+    expectBlockValue(container, "tailscale.expires", "tailscale.never");
+  });
+});