node/test/parallel/test-stream-buffer-list.js
Emil Sivervik 0aef78e4d0
test: increase buffer list coverage
1. test consuming BufferList which has strings with > 1 items
Refs: https://coverage.nodejs.org/coverage-0b6d3070a176d437/lib/internal/streams/buffer_list.js.html#L116

2. test consuming BufferList with > 1 items
Refs: https://coverage.nodejs.org/coverage-0b6d3070a176d437/lib/internal/streams/buffer_list.js.html#L152

PR-URL: https://github.com/nodejs/node/pull/36688
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2021-01-18 13:42:49 -08:00

85 lines
1.8 KiB
JavaScript

// Flags: --expose-internals
'use strict';
require('../common');
const assert = require('assert');
const BufferList = require('internal/streams/buffer_list');
// Test empty buffer list.
const emptyList = new BufferList();
emptyList.shift();
assert.deepStrictEqual(emptyList, new BufferList());
assert.strictEqual(emptyList.join(','), '');
assert.deepStrictEqual(emptyList.concat(0), Buffer.alloc(0));
const buf = Buffer.from('foo');
function testIterator(list, count) {
// test iterator
let len = 0;
// eslint-disable-next-line no-unused-vars
for (const x of list) {
len++;
}
assert.strictEqual(len, count);
}
// Test buffer list with one element.
const list = new BufferList();
testIterator(list, 0);
list.push(buf);
testIterator(list, 1);
for (const x of list) {
assert.strictEqual(x, buf);
}
const copy = list.concat(3);
testIterator(copy, 3);
assert.notStrictEqual(copy, buf);
assert.deepStrictEqual(copy, buf);
assert.strictEqual(list.join(','), 'foo');
const shifted = list.shift();
testIterator(list, 0);
assert.strictEqual(shifted, buf);
assert.deepStrictEqual(list, new BufferList());
{
const list = new BufferList();
list.push('foo');
list.push('bar');
list.push('foo');
list.push('bar');
assert.strictEqual(list.consume(6, true), 'foobar');
assert.strictEqual(list.consume(6, true), 'foobar');
}
{
const list = new BufferList();
list.push('foo');
list.push('bar');
assert.strictEqual(list.consume(5, true), 'fooba');
}
{
const list = new BufferList();
list.push(buf);
list.push(buf);
list.push(buf);
list.push(buf);
assert.strictEqual(list.consume(6).toString(), 'foofoo');
assert.strictEqual(list.consume(6).toString(), 'foofoo');
}
{
const list = new BufferList();
list.push(buf);
list.push(buf);
assert.strictEqual(list.consume(5).toString(), 'foofo');
}