import { describe, expect, it } from "vitest";
import { normalizeStringArray } from "./normalize-string-array";

describe("normalizeStringArray", () => {
  it("returns empty array for nullish/empty input", () => {
    expect(normalizeStringArray(undefined)).toEqual([]);
    expect(normalizeStringArray(null)).toEqual([]);
    expect(normalizeStringArray([])).toEqual([]);
  });

  it("trims values and removes empty entries", () => {
    expect(normalizeStringArray(["  staffing  ", " ", "\n"])).toEqual([
      "staffing",
    ]);
  });

  it("deduplicates values case-insensitively while preserving first casing", () => {
    expect(
      normalizeStringArray(["Recruit", "staffing", "recruit", "STAFFING"]),
    ).toEqual(["Recruit", "staffing"]);
  });
});