import { describe, it, expect } from "vitest";
import { encode_utf8, decode_utf8, test_utf8 } from "../src/struct_binpack.js";

describe("UTF-8 Encoding/Decoding", () => {
  it("should pass the built-in test", () => {
    expect(test_utf8()).toBe(true);
  });

  it("should handle ASCII strings", () => {
    const arr: number[] = [];
    encode_utf8(arr, "hello");
    const result = decode_utf8(arr);
    expect(result).toBe("hello");
  });

  it("should handle empty strings", () => {
    const arr: number[] = [];
    encode_utf8(arr, "");
    const result = decode_utf8(arr);
    expect(result).toBe("");
  });

  it("should handle unicode characters", () => {
    const original = "caf\u00E9"; // café
    const arr: number[] = [];
    encode_utf8(arr, original);
    const result = decode_utf8(arr);
    expect(result).toBe(original);
  });

  it("should handle special math symbols", () => {
    const original = "\u2260"; // ≠
    const arr: number[] = [];
    encode_utf8(arr, original);
    const result = decode_utf8(arr);
    expect(result).toBe(original);
  });

  it("should handle mixed ASCII and unicode", () => {
    const original = "a\u2260b";
    const arr: number[] = [];
    encode_utf8(arr, original);
    const result = decode_utf8(arr);
    expect(result).toBe(original);
  });
});