import { assertEquals } from "assert";
import { b } from "../helpers.ts";
import * as base64url from "../../public/common/base64url.js";

Deno.test('encodes no bytes as ""', () => {
  assertEquals(base64url.stringify(b()), "");
});

Deno.test("encodes in a URL-safe way", () => {
  const input = b(105, 183, 62, 249, 215, 191, 254);
  assertEquals(
    base64url.stringify(input),
    "abc--de__g",
  );
});

Deno.test("decodes the empty string", () => {
  assertEquals(base64url.parse(""), b());
});

Deno.test("decodes URL-safe strings", () => {
  assertEquals(base64url.parse("_-o"), b(255, 234));
});

Deno.test("decodes URL-unsafe strings (as a bonus)", () => {
  assertEquals(base64url.parse("/+o="), b(255, 234));
});

Deno.test("round-trips", () => {
  const testCases = [
    b(),
    b(1),
    b(1, 2, 3),
    b(255, 234),
    b(105, 183, 62, 249, 215, 191, 254),
  ];

  for (const original of testCases) {
    const string = base64url.stringify(original);
    const parsed = base64url.parse(string);
    assertEquals(parsed, original, `Round-trip failed for ${original}`);
  }
});