Add widget component tests (scrutiny..tailscale)

src/widgets/spoolman/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";
+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/spoolman/component", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("renders guessed loading blocks while loading", () => {
+    useWidgetAPI.mockReturnValue({ data: undefined, error: undefined });
+
+    const service = { widget: { type: "spoolman", spoolIds: [1, 2] } };
+    const { container } = renderWithProviders(<Component service={service} />, { settings: { hideErrors: false } });
+
+    expect(container.querySelectorAll(".service-block")).toHaveLength(2);
+    expect(screen.getAllByText("spoolman.loading")).toHaveLength(2);
+  });
+
+  it("renders no-spools message when API returns an empty list", () => {
+    useWidgetAPI.mockReturnValue({ data: [], error: undefined });
+
+    renderWithProviders(<Component service={{ widget: { type: "spoolman" } }} />, { settings: { hideErrors: false } });
+
+    expect(screen.getByText("spoolman.noSpools")).toBeInTheDocument();
+  });
+
+  it("filters to selected spoolIds and caps at 4 entries", () => {
+    useWidgetAPI.mockReturnValue({
+      data: [
+        { id: 1, remaining_weight: 50, initial_weight: 100, filament: { name: "A" } },
+        { id: 2, remaining_weight: 25, initial_weight: 100, filament: { name: "B" } },
+        { id: 3, remaining_weight: 10, initial_weight: 100, filament: { name: "C" } },
+        { id: 4, remaining_weight: 10, initial_weight: 100, filament: { name: "D" } },
+        { id: 5, remaining_weight: 10, initial_weight: 100, filament: { name: "E" } },
+      ],
+      error: undefined,
+    });
+
+    const service = { widget: { type: "spoolman", spoolIds: [2, 3, 4, 5, 1] } };
+    const { container } = renderWithProviders(<Component service={service} />, { settings: { hideErrors: false } });
+
+    // After filtering and capping to 4, we should see 4 blocks.
+    expect(container.querySelectorAll(".service-block")).toHaveLength(4);
+    expectBlockValue(container, "A", 50);
+    expectBlockValue(container, "B", 25);
+  });
+});