addition of new dashboard

backend/modules/dashboard/series.test.js

@@ -0,0 +1,37 @@
+import { jest } from "@jest/globals";
+
+const query = jest.fn();
+const release = jest.fn(async () => {});
+jest.unstable_mockModule("../../db/index.js", () => ({ getPool: async () => ({ query, release }) }));
+
+const { getSeries } = await import("./series.js");
+
+beforeEach(() => {
+  query.mockReset();
+  release.mockClear();
+});
+
+describe("getSeries (combined usage + storage, one query)", () => {
+  it("splits one result set into usage counts and storage byte totals with computed totals", async () => {
+    query.mockResolvedValue({
+      rows: [
+        { date: "2026-06-01", core: 3, audit: 5, core_disk: "100", audit_disk: "50" },
+        { date: "2026-06-02", core: 0, audit: 0, core_disk: "100", audit_disk: "50" },
+      ],
+    });
+
+    const out = await getSeries(7, { from: "2026-06-01", to: "2026-06-02" });
+
+    expect(query).toHaveBeenCalledTimes(1); // single round-trip
+    expect(query.mock.calls[0][1]).toEqual([7, "2026-06-01", "2026-06-02"]);
+    expect(out.usage).toEqual([
+      { date: "2026-06-01", core: 3, audit: 5, total: 8 },
+      { date: "2026-06-02", core: 0, audit: 0, total: 0 },
+    ]);
+    expect(out.storage).toEqual([
+      { date: "2026-06-01", coreDisk: 100, auditDisk: 50, totalDisk: 150 },
+      { date: "2026-06-02", coreDisk: 100, auditDisk: 50, totalDisk: 150 },
+    ]);
+    expect(release).toHaveBeenCalledTimes(1);
+  });
+});