import { describe, expect, it } from "vitest";
import { mergeRefsWithContentHash, normalizeRefsField } from "../src/refs-field.js";

describe("mergeRefsWithContentHash", () => {
  it("appends a new content hash", () => {
    expect(mergeRefsWithContentHash(["a", "b"], "c")).toEqual(["a", "b", "c"]);
  });

  it("skips duplicate content hash", () => {
    expect(mergeRefsWithContentHash(["a", "b"], "b")).toEqual(["a", "b"]);
  });

  it("preserves order", () => {
    expect(mergeRefsWithContentHash(["x", "y"], "z")).toEqual(["x", "y", "z"]);
  });

  it("handles empty refs", () => {
    expect(mergeRefsWithContentHash([], "a")).toEqual(["a"]);
  });
});

describe("normalizeRefsField", () => {
  it("returns empty array for non-array", () => {
    expect(normalizeRefsField(null)).toEqual([]);
    expect(normalizeRefsField(undefined)).toEqual([]);
    expect(normalizeRefsField(42)).toEqual([]);
  });

  it("passes through string array", () => {
    expect(normalizeRefsField(["a", "b"])).toEqual(["a", "b"]);
  });

  it("filters non-strings from mixed array", () => {
    expect(normalizeRefsField(["a", 1, "b", null])).toEqual(["a", "b"]);
  });

  it("handles empty array", () => {
    expect(normalizeRefsField([])).toEqual([]);
  });
});