Chore: homepage tests (#6278)

src/__tests__/pages/api/widgets/kubernetes.test.js

@@ -0,0 +1,204 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import createMockRes from "test-utils/create-mock-res";
+
+const { kc, coreApi, metricsApi, getKubeConfig, parseCpu, parseMemory, logger } = vi.hoisted(() => {
+  const coreApi = { listNode: vi.fn() };
+  const metricsApi = { getNodeMetrics: vi.fn() };
+
+  const kc = {
+    makeApiClient: vi.fn(() => coreApi),
+  };
+
+  return {
+    kc,
+    coreApi,
+    metricsApi,
+    getKubeConfig: vi.fn(),
+    parseCpu: vi.fn(),
+    parseMemory: vi.fn(),
+    logger: { error: vi.fn(), debug: vi.fn() },
+  };
+});
+
+vi.mock("@kubernetes/client-node", () => ({
+  CoreV1Api: class CoreV1Api {},
+  Metrics: class Metrics {
+    constructor() {
+      return metricsApi;
+    }
+  },
+}));
+
+vi.mock("utils/config/kubernetes", () => ({
+  getKubeConfig,
+}));
+
+vi.mock("utils/kubernetes/utils", () => ({
+  parseCpu,
+  parseMemory,
+}));
+
+vi.mock("utils/logger", () => ({
+  default: () => logger,
+}));
+
+import handler from "pages/api/widgets/kubernetes";
+
+describe("pages/api/widgets/kubernetes", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("returns 500 when no kube config is available", async () => {
+    getKubeConfig.mockReturnValueOnce(null);
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    expect(res.statusCode).toBe(500);
+    expect(res.body.error).toBe("No kubernetes configuration");
+  });
+
+  it("returns 500 when listing nodes fails", async () => {
+    getKubeConfig.mockReturnValueOnce(kc);
+    coreApi.listNode.mockResolvedValueOnce(null);
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    expect(res.statusCode).toBe(500);
+    expect(res.body.error).toContain("fetching nodes");
+  });
+
+  it("logs and returns 500 when listing nodes throws", async () => {
+    getKubeConfig.mockReturnValueOnce(kc);
+    coreApi.listNode.mockRejectedValueOnce({ statusCode: 500, body: "nope", response: "nope" });
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    expect(logger.error).toHaveBeenCalled();
+    expect(logger.debug).toHaveBeenCalled();
+    expect(res.statusCode).toBe(500);
+    expect(res.body.error).toContain("fetching nodes");
+  });
+
+  it("returns 500 when metrics lookup fails", async () => {
+    getKubeConfig.mockReturnValueOnce(kc);
+    parseMemory.mockReturnValue(100);
+    coreApi.listNode.mockResolvedValueOnce({
+      items: [
+        {
+          metadata: { name: "n1" },
+          status: { capacity: { cpu: "1", memory: "100" }, conditions: [{ type: "Ready", status: "True" }] },
+        },
+      ],
+    });
+    metricsApi.getNodeMetrics.mockRejectedValueOnce(new Error("nope"));
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    expect(res.statusCode).toBe(500);
+    expect(res.body.error).toContain("Error getting metrics");
+  });
+
+  it("returns cluster totals and per-node usage", async () => {
+    getKubeConfig.mockReturnValueOnce(kc);
+
+    parseMemory.mockImplementation((value) => {
+      if (value === "100") return 100;
+      if (value === "50") return 50;
+      if (value === "30") return 30;
+      return 0;
+    });
+    parseCpu.mockImplementation((value) => {
+      if (value === "100m") return 0.1;
+      if (value === "200m") return 0.2;
+      return 0;
+    });
+
+    coreApi.listNode.mockResolvedValueOnce({
+      items: [
+        {
+          metadata: { name: "n1" },
+          status: { capacity: { cpu: "1", memory: "100" }, conditions: [{ type: "Ready", status: "True" }] },
+        },
+        {
+          metadata: { name: "n2" },
+          status: { capacity: { cpu: "2", memory: "50" }, conditions: [{ type: "Ready", status: "False" }] },
+        },
+      ],
+    });
+
+    metricsApi.getNodeMetrics.mockResolvedValueOnce({
+      items: [
+        { metadata: { name: "n1" }, usage: { cpu: "100m", memory: "30" } },
+        { metadata: { name: "n2" }, usage: { cpu: "200m", memory: "50" } },
+      ],
+    });
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    expect(res.statusCode).toBe(200);
+    expect(res.body.cluster.cpu.total).toBe(3);
+    expect(res.body.cluster.cpu.load).toBeCloseTo(0.3);
+    expect(res.body.cluster.memory.total).toBe(150);
+    expect(res.body.nodes).toHaveLength(2);
+    expect(res.body.nodes.find((n) => n.name === "n1").cpu.percent).toBeCloseTo(10);
+  });
+
+  it("returns a metrics error when metrics contain an unexpected node name", async () => {
+    getKubeConfig.mockReturnValueOnce(kc);
+    parseMemory.mockReturnValue(100);
+    parseCpu.mockReturnValue(0.1);
+
+    coreApi.listNode.mockResolvedValueOnce({
+      items: [
+        {
+          metadata: { name: "n1" },
+          status: { capacity: { cpu: "1", memory: "100" }, conditions: [{ type: "Ready", status: "True" }] },
+        },
+      ],
+    });
+    metricsApi.getNodeMetrics.mockResolvedValueOnce({
+      items: [{ metadata: { name: "n2" }, usage: { cpu: "100m", memory: "30" } }],
+    });
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    expect(res.statusCode).toBe(500);
+    expect(res.body.error).toContain("Error getting metrics");
+    expect(logger.error).toHaveBeenCalled();
+  });
+
+  it("returns 500 when an unexpected error is thrown", async () => {
+    getKubeConfig.mockImplementationOnce(() => {
+      throw new Error("boom");
+    });
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    expect(res.statusCode).toBe(500);
+    expect(res.body).toEqual({ error: "unknown error" });
+    expect(logger.error).toHaveBeenCalled();
+  });
+});