import { describe, it, expect } from "vitest";
import { filterNewResults } from "../admin.sports-seasons.$id.events.$eventId.helpers";

describe("filterNewResults", () => {
  it("returns all rows when no existing results", () => {
    const incoming = [
      { participantId: "p1", placement: 1 },
      { participantId: "p2", placement: 2 },
    ];
    expect(filterNewResults(incoming, new Set())).toEqual(incoming);
  });

  it("skips participantIds already in existingIds", () => {
    const incoming = [
      { participantId: "p1", placement: 1 },
      { participantId: "p2", placement: 2 },
    ];
    const existing = new Set(["p1"]);
    expect(filterNewResults(incoming, existing)).toEqual([
      { participantId: "p2", placement: 2 },
    ]);
  });

  it("returns empty array when all are duplicates", () => {
    const incoming = [{ participantId: "p1", placement: 1 }];
    const existing = new Set(["p1"]);
    expect(filterNewResults(incoming, existing)).toEqual([]);
  });
});