feat: finish the host-metrics plugin, move host status into core (B16)

plugins/host-metrics/tests/frontend/host-metrics-api.test.ts

@@ -0,0 +1,73 @@
+import { describe, expect, it, vi } from "vitest";
+import { createHostMetricsApi } from "../../src/frontend/host-metrics-api";
+
+function client() {
+  return {
+    get: vi.fn(),
+    post: vi.fn(),
+    put: vi.fn(),
+    patch: vi.fn(),
+    delete: vi.fn(),
+  };
+}
+
+const notFound = () =>
+  Object.assign(new Error("Not found"), { response: { status: 404 } });
+
+describe("host metrics api", () => {
+  it("answers null while a host has no sample", async () => {
+    const api = client();
+    api.get.mockRejectedValue(notFound());
+    await expect(createHostMetricsApi(api).getMetrics(7)).resolves.toBeNull();
+    expect(api.get).toHaveBeenCalledWith("/metrics/7");
+  });
+
+  it("reports a swept viewer instead of throwing", async () => {
+    const api = client();
+    api.post.mockRejectedValueOnce(notFound());
+    await expect(
+      createHostMetricsApi(api).heartbeat("expired-viewer"),
+    ).resolves.toBe(false);
+    expect(api.post).toHaveBeenCalledWith("/metrics/heartbeat", {
+      viewerSessionId: "expired-viewer",
+    });
+
+    api.post.mockResolvedValueOnce({ data: { success: true } });
+    await expect(createHostMetricsApi(api).heartbeat("live")).resolves.toBe(
+      true,
+    );
+  });
+
+  it("carries the server's connection logs on a failed start", async () => {
+    const api = client();
+    api.post.mockRejectedValue(
+      Object.assign(new Error("boom"), {
+        response: {
+          status: 500,
+          data: { error: "No route", connectionLogs: [{ message: "x" }] },
+        },
+      }),
+    );
+    await expect(
+      createHostMetricsApi(api).startMetrics(7),
+    ).rejects.toMatchObject({
+      message: "No route",
+      connectionLogs: [{ message: "x" }],
+    });
+  });
+
+  it("puts the host id between a manager and its action", async () => {
+    const api = client();
+    api.post.mockResolvedValue({ data: { success: true } });
+    await createHostMetricsApi(api).managerPost(
+      7,
+      "services",
+      { a: 1 },
+      "action",
+    );
+    expect(api.post).toHaveBeenCalledWith(
+      "/host-metrics/managers/services/7/action",
+      { a: 1 },
+    );
+  });
+});