import { describe, expect, it } from "vitest";
import { hasCompletedInitialSync } from "./initial-sync";

describe("initial sync readiness", () => {
  it("waits while the newly paired source has never completed a sync", () => {
    expect(
      hasCompletedInitialSync(
        [{ deviceId: "source", lastSyncedAt: undefined }],
        "source",
      ),
    ).toBe(false);
  });

  it("does not accept another mesh peer's completed sync", () => {
    expect(
      hasCompletedInitialSync(
        [
          { deviceId: "source" },
          { deviceId: "other", lastSyncedAt: 1_700_000_000_000 },
        ],
        "source",
      ),
    ).toBe(false);
  });

  it("becomes ready after the paired source records a completed sync", () => {
    expect(
      hasCompletedInitialSync(
        [{ deviceId: "source", lastSyncedAt: 1_700_000_000_000 }],
        "source",
      ),
    ).toBe(true);
  });
});