web/src/lib/utils/base64Utils.test.mjs

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

import assert from 'node:assert/strict';
import { test } from 'node:test';
import { decodeBase64 } from './base64Utils.ts';

test('decode message payloads as UTF-8 text', () => {
  for (const payload of ['plain text', 'Kraków 🦀', '{"city":"Kraków"}', '<city>Kraków</city>']) {
    const encoded = Buffer.from(payload, 'utf8').toString('base64');
    assert.equal(decodeBase64(encoded), payload);
  }
});

test('reject invalid Base64 and preserve empty text', () => {
  assert.equal(decodeBase64('%%%'), null);
  assert.equal(decodeBase64(''), '');
});