file-box/dist/esm/src/pure-functions/sized-chunk-transformer.spec.js

Pack a File into Box for easy move/transfer between servers no matter of where it is.(local path, remote url, or cloud storage)

#!/usr/bin/env -S node --no-warnings --loader ts-node/esm
/* eslint @typescript-eslint/no-unused-vars:off */
import { test } from 'tstest';
import { PassThrough, } from 'stream';
import { sizedChunkTransformer } from './sized-chunk-transformer.js';
test('chunkerTransformStream()', async (t) => {
    const DATA_LIST = [
        'a',
        'b',
    ];
    const DATA = DATA_LIST.join('');
    const createStream = () => {
        const stream = new PassThrough();
        stream.end(DATA);
        return stream;
    };
    const getDataList = (stream) => {
        return new Promise(resolve => {
            const list = [];
            stream.on('end', () => resolve(list));
            stream.on('data', chunk => list.push(chunk));
        });
    };
    const newStream0 = createStream();
    const dataList0 = await getDataList(newStream0);
    t.equal(dataList0.length, 1, 'should get 1 chunks');
    t.equal(dataList0[0].toString(), DATA, 'should get data');
    const newStream1 = createStream().pipe(sizedChunkTransformer(2));
    const dataList1 = await getDataList(newStream1);
    t.equal(dataList1.length, 1, 'should get 1 chunks');
    t.equal(dataList1[0].toString(), DATA, 'should get data');
    const newStream2 = createStream().pipe(sizedChunkTransformer(1));
    const dataList2 = await getDataList(newStream2);
    t.equal(dataList2.length, 2, 'should get 2 chunks');
    t.equal(dataList2.join(''), DATA, 'should get data');
});
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