Chore: homepage tests (#6278)

src/widgets/prometheusmetric/component.test.jsx

@@ -0,0 +1,115 @@
+// @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/prometheusmetric/component", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("renders blocks for configured metrics even when data is not yet available", () => {
+    useWidgetAPI.mockReturnValue({ data: undefined, error: undefined });
+
+    const service = {
+      widget: {
+        type: "prometheusmetric",
+        metrics: [
+          { label: "prometheusmetric.metricA", query: "metric_a" },
+          { label: "prometheusmetric.metricB", query: "metric_b" },
+        ],
+      },
+    };
+
+    const { container } = renderWithProviders(<Component service={service} />, { settings: { hideErrors: false } });
+
+    // Component renders one Block per metric; with no widget.fields, Container does not filter.
+    expect(container.querySelectorAll(".service-block")).toHaveLength(2);
+    expect(screen.getByText("prometheusmetric.metricA")).toBeInTheDocument();
+    expect(screen.getByText("prometheusmetric.metricB")).toBeInTheDocument();
+  });
+
+  it("formats scalar and vector query results (scale + prefix + suffix)", () => {
+    useWidgetAPI.mockImplementation((_widget, _endpoint, params) => {
+      if (params?.query === "scalar_q") {
+        return {
+          data: { data: { resultType: "scalar", result: [0, "5"] } },
+          error: undefined,
+        };
+      }
+
+      if (params?.query === "vector_q") {
+        return {
+          data: { data: { resultType: "vector", result: [{ value: [0, "3"] }] } },
+          error: undefined,
+        };
+      }
+
+      return { data: undefined, error: undefined };
+    });
+
+    const service = {
+      widget: {
+        type: "prometheusmetric",
+        metrics: [
+          {
+            label: "prometheusmetric.scalar",
+            query: "scalar_q",
+            format: { type: "number", scale: 2, prefix: "~", suffix: "x" },
+          },
+          {
+            label: "prometheusmetric.vector",
+            query: "vector_q",
+            format: { type: "number", scale: "1/2" },
+          },
+        ],
+      },
+    };
+
+    const { container } = renderWithProviders(<Component service={service} />, { settings: { hideErrors: false } });
+
+    // scalar "5" * 2 => 10 => "~10x"
+    expectBlockValue(container, "prometheusmetric.scalar", "~10x");
+    // vector "3" * (1/2) => 1.5
+    expectBlockValue(container, "prometheusmetric.vector", 1.5);
+  });
+
+  it("renders error UI when any query errors", () => {
+    useWidgetAPI.mockImplementation((_widget, _endpoint, params) => {
+      if (params?.query === "bad") return { data: undefined, error: { message: "nope" } };
+      return { data: { data: { resultType: "scalar", result: [0, "1"] } }, error: undefined };
+    });
+
+    renderWithProviders(
+      <Component
+        service={{
+          widget: {
+            type: "prometheusmetric",
+            metrics: [
+              { label: "prometheusmetric.ok", query: "ok" },
+              { label: "prometheusmetric.bad", query: "bad" },
+            ],
+          },
+        }}
+      />,
+      { settings: { hideErrors: false } },
+    );
+
+    expect(screen.getAllByText(/widget\.api_error/i).length).toBeGreaterThan(0);
+    expect(screen.getByText("nope")).toBeInTheDocument();
+  });
+});

src/widgets/prometheusmetric/widget.test.js

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+import { describe, it } from "vitest";
+
+import { expectWidgetConfigShape } from "test-utils/widget-config";
+
+import widget from "./widget";
+
+describe("prometheusmetric widget config", () => {
+  it("exports a valid widget config", () => {
+    expectWidgetConfigShape(widget);
+  });
+});