const { sanitizeDepartmentIds } = require("../../src/services/featureFlags");

describe("sanitizeDepartmentIds", () => {
  it("returns empty array when input is not array", () => {
    expect(sanitizeDepartmentIds(null)).toEqual([]);
    expect(sanitizeDepartmentIds("dept")).toEqual([]);
  });

  it("trims ids, removes empty values and deduplicates", () => {
    const value = ["  dept-a  ", "dept-b", "", "dept-a", "   "];
    expect(sanitizeDepartmentIds(value)).toEqual(["dept-a", "dept-b"]);
  });

  it("filters non-string items", () => {
    const value = ["dept-a", 1, true, { id: "dept-b" }, "dept-c"];
    expect(sanitizeDepartmentIds(value)).toEqual(["dept-a", "dept-c"]);
  });
});