text: /*
   * SPDX-License-Identifier: Apache-2.0
   *
   * The OpenSearch Contributors require contributions made to
   * this file be licensed under the Apache-2.0 license or a
   * compatible open source license.
   *
   * Any modifications Copyright OpenSearch Contributors. See
   * GitHub history for details.
   */
  
  /*
   * Licensed to Elasticsearch B.V. under one or more contributor
   * license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright
   * ownership. Elasticsearch B.V. 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 { createSplitStream, createConcatStream, createPromiseFromStreams } from './';
  
  async function split(stream, input) {
    const concat = createConcatStream();
    concat.write([]);
    stream.pipe(concat);
    const output = createPromiseFromStreams([concat]);
  
    input.forEach((i) => {
      stream.write(i);
    });
    stream.end();
  
    return await output;
  }
  
  describe('splitStream', () => {
    test('splits buffers, produces strings', async () => {
      const output = await split(createSplitStream('&'), [Buffer.from('foo&bar')]);
      expect(output).toEqual(['foo', 'bar']);
    });
  
    test('supports mixed input', async () => {
      const output = await split(createSplitStream('&'), [Buffer.from('foo&b'), 'ar']);
      expect(output).toEqual(['foo', 'bar']);
    });
  
    test('supports buffer split chunks', async () => {
      const output = await split(createSplitStream(Buffer.from('&')), ['foo&b', 'ar']);
      expect(output).toEqual(['foo', 'bar']);
    });
  
    test('splits provided values by a delimiter', async () => {
      const output = await split(createSplitStream('&'), ['foo&b', 'ar']);
      expect(output).toEqual(['foo', 'bar']);
    });
  
    test('handles multi-character delimiters', async () => {
      const output = await split(createSplitStream('oo'), ['foo&b', 'ar']);
      expect(output).toEqual(['f', '&bar']);
    });
  
    test('handles delimiters that span multiple chunks', async () => {
      const output = await split(createSplitStream('ba'), ['foo&b', 'ar']);
      expect(output).toEqual(['foo&', 'r']);
    });
  
    test('produces an empty chunk if the split char is at the end of the input', async () => {
      const output = await split(createSplitStream('&bar'), ['foo&b', 'ar']);
      expect(output).toEqual(['foo', '']);
    });
  });
  