test: cover glances widget internal modules

src/widgets/glances/metrics/gpu.test.jsx

@@ -0,0 +1,25 @@
+// @vitest-environment jsdom
+
+import { screen } from "@testing-library/react";
+import { 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 }));
+vi.mock("next/dynamic", () => ({ default: () => () => null }));
+
+import Component from "./gpu";
+
+describe("widgets/glances/metrics/gpu", () => {
+  it("renders a placeholder while loading", () => {
+    useWidgetAPI.mockReturnValue({ data: undefined, error: undefined });
+    renderWithProviders(
+      <Component service={{ widget: { chart: false, version: 3, pointsLimit: 3, metric: "gpu:gpu0" } }} />,
+      {
+        settings: { hideErrors: false },
+      },
+    );
+    expect(screen.getByText("-")).toBeInTheDocument();
+  });
+});